696 lines
50 KiB
C
Executable File
696 lines
50 KiB
C
Executable File
/////////////////////////////////////////////////////////////////////////////////////////////////////////
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//
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// Name: tranzputer.h
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// Created: May 2020
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// Author(s): Philip Smart
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// Description: The TranZPUter library.
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// This file contains methods which allow applications to access and control the traZPUter board and the underlying Sharp MZ80A host.
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// Credits:
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// Copyright: (c) 2019-2020 Philip Smart <philip.smart@net2net.org>
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//
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// History: May 2020 - Initial write of the TranZPUter software.
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// July 2020- Updates to accommodate v2.1 of the tranZPUter board.
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//
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// Notes: See Makefile to enable/disable conditional components
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//
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/////////////////////////////////////////////////////////////////////////////////////////////////////////
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// This source file is free software: you can redistribute it and#or modify
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// it under the terms of the GNU General Public License as published
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// by the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This source file is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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/////////////////////////////////////////////////////////////////////////////////////////////////////////
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#ifndef TRANZPUTER_H
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#define TRANZPUTER_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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// Configurable constants.
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//
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//#define DECODE_Z80_IO 3 // Flag to enable code, via interrupt, to capture Z80 actions on I/O ports an Memory mapped I/O.
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// 0 = No code other than direct service request interrupts.
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// 1 = Decode Z80 I/O address operations.
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// 2 = Decode Z80 I/O operations with data.
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// 3 = NZ700 memory mode decode - This doesnt work per original, the memory change occurs one instruction after the OUT instruction due to the way the Z80 functions in respect to BUSRQ.
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#define REFRESH_BYTE_COUNT 8 // This constant controls the number of bytes read/written to the z80 bus before a refresh cycle is needed.
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#define RFSH_BYTE_CNT 256 // Number of bytes we can write before needing a full refresh for the DRAM.
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#define TZBOARD 210 // tranZPUter SW Hardware versions - v1.0 = 110, v1.1 = 110, v2.0 = 200 and v2.1 = 210
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// tranZPUter Memory Modes - select one of the 32 possible memory models using these constants.
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//
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#define TZMM_ORIG 0x00 // Original Sharp MZ80A mode, no tranZPUter features are selected except the I/O control registers (default: 0x60-063).
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#define TZMM_BOOT 0x01 // Original mode but E800-EFFF is mapped to tranZPUter RAM so TZFS can be booted.
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#define TZMM_TZFS 0x02 // TZFS main memory configuration. all memory is in tranZPUter RAM, E800-FFFF is used by TZFS, SA1510 is at 0000-1000 and RAM is 1000-CFFF, 64K Block 0 selected.
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#define TZMM_TZFS2 0x03 // TZFS main memory configuration. all memory is in tranZPUter RAM, E800-EFFF is used by TZFS, SA1510 is at 0000-1000 and RAM is 1000-CFFF, 64K Block 0 selected, F000-FFFF is in 64K Block 1.
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#define TZMM_TZFS3 0x04 // TZFS main memory configuration. all memory is in tranZPUter RAM, E800-EFFF is used by TZFS, SA1510 is at 0000-1000 and RAM is 1000-CFFF, 64K Block 0 selected, F000-FFFF is in 64K Block 2.
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#define TZMM_TZFS4 0x05 // TZFS main memory configuration. all memory is in tranZPUter RAM, E800-EFFF is used by TZFS, SA1510 is at 0000-1000 and RAM is 1000-CFFF, 64K Block 0 selected, F000-FFFF is in 64K Block 3.
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#define TZMM_CPM 0x06 // CPM main memory configuration, all memory on the tranZPUter board, 64K block 4 selected. Special case for F3C0:F3FF & F7C0:F7FF (floppy disk paging vectors) which resides on the mainboard.
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#define TZMM_CPM2 0x07 // CPM main memory configuration, F000-FFFF are on the tranZPUter board in block 4, 0040-CFFF and E800-EFFF are in block 5, mainboard for D000-DFFF (video), E000-E800 (Memory control) selected.
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// Special case for 0000:003F (interrupt vectors) which resides in block 4, F3C0:F3FF & F7C0:F7FF (floppy disk paging vectors) which resides on the mainboard.
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#define TZMM_MZ700_0 0x0a // MZ700 Mode - 0000:0FFF is on the tranZPUter board in block 6, 1000:CFFF is on the tranZPUter board in block 0, D000:FFFF is on the mainboard.
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#define TZMM_MZ700_1 0x0b // MZ700 Mode - 0000:0FFF is on the tranZPUter board in block 0, 1000:CFFF is on the tranZPUter board in block 0, D000:FFFF is on the tranZPUter in block 6.
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#define TZMM_MZ700_2 0x0c // MZ700 Mode - 0000:0FFF is on the tranZPUter board in block 6, 1000:CFFF is on the tranZPUter board in block 0, D000:FFFF is on the tranZPUter in block 6.
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#define TZMM_MZ700_3 0x0d // MZ700 Mode - 0000:0FFF is on the tranZPUter board in block 0, 1000:CFFF is on the tranZPUter board in block 0, D000:FFFF is inaccessible.
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#define TZMM_MZ700_4 0x0e // MZ700 Mode - 0000:0FFF is on the tranZPUter board in block 6, 1000:CFFF is on the tranZPUter board in block 0, D000:FFFF is inaccessible.
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#define TZMM_TZPU0 0x18 // Everything is in tranZPUter domain, no access to underlying Sharp mainboard unless memory management mode is switched. tranZPUter RAM 64K block 0 is selected.
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#define TZMM_TZPU1 0x19 // Everything is in tranZPUter domain, no access to underlying Sharp mainboard unless memory management mode is switched. tranZPUter RAM 64K block 1 is selected.
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#define TZMM_TZPU2 0x1A // Everything is in tranZPUter domain, no access to underlying Sharp mainboard unless memory management mode is switched. tranZPUter RAM 64K block 2 is selected.
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#define TZMM_TZPU3 0x1B // Everything is in tranZPUter domain, no access to underlying Sharp mainboard unless memory management mode is switched. tranZPUter RAM 64K block 3 is selected.
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#define TZMM_TZPU4 0x1C // Everything is in tranZPUter domain, no access to underlying Sharp mainboard unless memory management mode is switched. tranZPUter RAM 64K block 4 is selected.
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#define TZMM_TZPU5 0x1D // Everything is in tranZPUter domain, no access to underlying Sharp mainboard unless memory management mode is switched. tranZPUter RAM 64K block 5 is selected.
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#define TZMM_TZPU6 0x1E // Everything is in tranZPUter domain, no access to underlying Sharp mainboard unless memory management mode is switched. tranZPUter RAM 64K block 6 is selected.
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#define TZMM_TZPU7 0x1F // Everything is in tranZPUter domain, no access to underlying Sharp mainboard unless memory management mode is switched. tranZPUter RAM 64K block 7 is selected.
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#define TZMM_ENIOWAIT 0x20 // Enable wait state generator for Sharp system IO operations in region 0xE0-0xFF.
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// IO addresses on the tranZPUter or mainboard.
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//
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#define IO_TZ_CTRLLATCH 0x60 // Control latch which specifies the Memory Model/mode.
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#define IO_TZ_SETXMHZ 0x62 // Switch to alternate CPU frequency provided by K64F.
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#define IO_TZ_SET2MHZ 0x64 // Switch to system CPU frequency.
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#define IO_TZ_CLKSELRD 0x66 // Read the status of the clock select, ie. which clock is connected to the CPU.
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#define IO_TZ_SVCREQ 0x68 // Service request from the Z80 to be provided by the K64F.
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#define IO_TZ_SYSREQ 0x6A // System request from the Z80 to be provided by the K64F.
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// Sharp MZ80A constants.
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//
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#define MZ_MROM_ADDR 0x0000 // Monitor ROM start address.
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#define MZ_MROM_STACK_ADDR 0x1000 // Monitor ROM start stack address.
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#define MZ_MROM_STACK_SIZE 0x0200 // Monitor ROM stack size.
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#define MZ_UROM_ADDR 0xE800 // User ROM start address.
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#define MZ_BANKRAM_ADDR 0xF000 // Floppy API address which is used in TZFS as the paged RAM for additional functionality.
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#define MZ_CMT_ADDR 0x10F0 // Address of the CMT (tape) header record.
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#define MZ_CMT_DEFAULT_LOAD_ADDR 0x1200 // The default load address for a CMT, anything below this is normally illegal.
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#define MZ_VID_RAM_ADDR 0xD000 // Start of Video RAM
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#define MZ_VID_RAM_SIZE 2048 // Size of Video RAM.
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#define MZ_VID_DFLT_BYTE 0x00 // Default character (SPACE) for video RAM.
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#define MZ_ATTR_RAM_ADDR 0xD800 // On machines with the upgrade, the start of the Attribute RAM.
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#define MZ_ATTR_RAM_SIZE 2048 // Size of the attribute RAM.
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#define MZ_ATTR_DFLT_BYTE 0x07 // Default colour (White on Black) for the attribute.
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#define MZ_SCROL_BASE 0xE200 // Base address of the hardware scroll registers.
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#define MZ_SCROL_END 0xE2FF // End address of the hardware scroll registers.
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#define MZ_MEMORY_SWAP 0xE00C // Address when read swaps the memory from 0000-0FFF -> C000-CFFF
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#define MZ_MEMORY_RESET 0xE010 // Address when read resets the memory to the default location 0000-0FFF.
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#define MZ_CRT_NORMAL 0xE014 // Address when read sets the CRT to normal display mode.
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#define MZ_CRT_INVERSE 0xE018 // Address when read sets the CRT to inverted display mode.
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#define MZ_80A_CPU_FREQ 2000000 // CPU Speed of the Sharp MZ-80A
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#define MZ_700_CPU_FREQ 3580000 // CPU Speed of the Sharp MZ-700
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#define MZ_80B_CPU_FREQ 4000000 // CPU Speed of the Sharp MZ-80B
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#define MZ_ROM_SA1510_40C "0:\\TZFS\\SA1510.ROM" // Original 40 character Monitor ROM.
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#define MZ_ROM_SA1510_80C "0:\\TZFS\\SA1510-8.ROM" // Original Monitor ROM patched for 80 character screen mode.
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#define MZ_ROM_1Z_013A_40C "0:\\TZFS\\1Z-013A.ROM" // Original 40 character Monitor ROM for the Sharp MZ700.
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#define MZ_ROM_1Z_013A_80C "0:\\TZFS\\1Z-013A-8.ROM" // Original Monitor ROM patched for the Sharp MZ700 patched for 80 column mode.
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#define MZ_ROM_1Z_013A_KM_40C "0:\\TZFS\\1Z-013A-KM.ROM" // Original 40 character Monitor ROM for the Sharp MZ700 with keyboard remapped for the MZ80A.
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#define MZ_ROM_1Z_013A_KM_80C "0:\\TZFS\\1Z-013A-KM-8.ROM" // Original Monitor ROM patched for the Sharp MZ700 with keyboard remapped for the MZ80A and patched for 80 column mode.
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#define MZ_ROM_MZ80B_IPL "0:\\TZFS\\MZ80B_IPL.ROM" // Original IPL ROM for the Sharp MZ-80B.
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#define MZ_ROM_TZFS "0:\\TZFS\\TZFS.ROM" // tranZPUter Filing System ROM.
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// CP/M constants.
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//
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#define CPM_MAX_DRIVES 16 // Maximum number of drives in CP/M.
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#define CPM_FILE_CCPBDOS "0:\\CPM\\CPM22.BIN" // CP/M CCP and BDOS for warm start reloads.
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#define CPM_DRIVE_TMPL "0:\\CPM\\CPMDSK%02u.RAW" // Template for CPM disk drives stored on the SD card.
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#define CPM_SECTORS_PER_TRACK 32 // Number of sectors in a track on the virtual CPM disk.
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#define CPM_TRACKS_PER_DISK 1024 // Number of tracks on a disk.
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// Service request constants.
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//
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#define TZSVC_CMD_STRUCT_ADDR_TZFS 0x0ED80 // Address of the command structure within TZFS - exists in 64K Block 0.
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#define TZSVC_CMD_STRUCT_ADDR_CPM 0x4F560 // Address of the command structure within CP/M - exists in 64K Block 4.
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#define TZSVC_CMD_STRUCT_ADDR_MZ700 0x6FD80 // Address of the command structure within MZ700 compatible programs - exists in 64K Block 6.
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#define TZSVC_CMD_STRUCT_SIZE 0x280 // Size of the inter z80/K64 service command memory.
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#define TZSVC_CMD_SIZE (sizeof(t_svcControl)-TZSVC_SECTOR_SIZE)
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#define TZVC_MAX_CMPCT_DIRENT_BLOCK TZSVC_SECTOR_SIZE/TZSVC_CMPHDR_SIZE // Maximum number of directory entries per sector.
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#define TZSVC_MAX_DIR_ENTRIES 255 // Maximum number of files in one directory, any more than this will be ignored.
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#define TZSVC_CMPHDR_SIZE 32 // Compacted header size, contains everything except the comment field, padded out to 32bytes.
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#define MZF_FILLER_LEN 8 // Filler to pad a compacted header entry to a power of 2 length.
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#define TZVC_MAX_DIRENT_BLOCK TZSVC_SECTOR_SIZE/MZF_HEADER_SIZE // Maximum number of directory entries per sector.
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#define TZSVC_CMD_READDIR 0x01 // Service command to open a directory and return the first block of entries.
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#define TZSVC_CMD_NEXTDIR 0x02 // Service command to return the next block of an open directory.
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#define TZSVC_CMD_READFILE 0x03 // Service command to open a file and return the first block.
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#define TZSVC_CMD_NEXTREADFILE 0x04 // Service command to return the next block of an open file.
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#define TZSVC_CMD_WRITEFILE 0x05 // Service command to create a file and save the first block.
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#define TZSVC_CMD_NEXTWRITEFILE 0x06 // Service command to write the next block to the open file.
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#define TZSVC_CMD_CLOSE 0x07 // Service command to close any open file or directory.
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#define TZSVC_CMD_LOADFILE 0x08 // Service command to load a file directly into tranZPUter memory.
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#define TZSVC_CMD_SAVEFILE 0x09 // Service command to save a file directly from tranZPUter memory.
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#define TZSVC_CMD_ERASEFILE 0x0a // Service command to erase a file on the SD card.
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#define TZSVC_CMD_CHANGEDIR 0x0b // Service command to change active directory on the SD card.
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#define TZSVC_CMD_LOAD40BIOS 0x20 // Service command requesting that the 40 column version of the SA1510 BIOS is loaded.
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#define TZSVC_CMD_LOAD80BIOS 0x21 // Service command requesting that the 80 column version of the SA1510 BIOS is loaded.
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#define TZSVC_CMD_LOAD700BIOS40 0x22 // Service command requesting that the MZ700 1Z-013A 40 column BIOS is loaded.
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#define TZSVC_CMD_LOAD700BIOS80 0x23 // Service command requesting that the MZ700 1Z-013A 80 column patched BIOS is loaded.
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#define TZSVC_CMD_LOAD80BIPL 0x24 // Service command requesting the MZ-80B IPL is loaded.
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#define TZSVC_CMD_LOADBDOS 0x30 // Service command to reload CPM BDOS+CCP.
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#define TZSVC_CMD_ADDSDDRIVE 0x31 // Service command to attach a CPM disk to a drive number.
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#define TZSVC_CMD_READSDDRIVE 0x32 // Service command to read an attached SD file as a CPM disk drive.
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#define TZSVC_CMD_WRITESDDRIVE 0x33 // Service command to write to a CPM disk drive which is an attached SD file.
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#define TZSVC_CMD_CPU_BASEFREQ 0x40 // Service command to switch to the mainboard frequency.
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#define TZSVC_CMD_CPU_ALTFREQ 0x41 // Service command to switch to the alternate frequency provided by the K64F.
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#define TZSVC_CMD_CPU_CHGFREQ 0x42 // Service command to set the alternate frequency in hertz.
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#define TZSVC_DEFAULT_MZF_DIR "MZF" // Default directory where MZF files are stored.
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#define TZSVC_DEFAULT_CAS_DIR "CAS" // Default directory where BASIC CASsette files are stored.
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#define TZSVC_DEFAULT_BAS_DIR "BAS" // Default directory where BASIC text files are stored.
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#define TZSVC_DEFAULT_MZF_EXT "MZF" // Default file extension for MZF files.
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#define TZSVC_DEFAULT_CAS_EXT "CAS" // Default file extension for CASsette files.
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#define TZSVC_DEFAULT_BAS_EXT "BAS" // Default file extension for BASic script files stored in readable text.
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#define TZSVC_DEFAULT_WILDCARD "*" // Default wildcard file matching.
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#define TZSVC_RESULT_OFFSET 0x01 // Offset into structure of the result byte.
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#define TZSVC_DIRNAME_SIZE 20 // Limit is size of FAT32 directory name.
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#define TZSVC_WILDCARD_SIZE 20 // Very basic pattern matching so small size.
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#define TZSVC_FILENAME_SIZE MZF_FILENAME_LEN // Length of a Sharp MZF filename.
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#define TZSVC_LONG_FNAME_SIZE (sizeof(t_svcCmpDirEnt) - 1) // Length of a standard filename to fit inside a directory entry.
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#define TZSVC_LONG_FMT_FNAME_SIZE 20 // Length of a standard filename formatted in a directory listing.
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#define TZSVC_SECTOR_SIZE 512 // SD Card sector buffer size.
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#define TZSVC_STATUS_OK 0x00 // Flag to indicate the K64F processing completed successfully.
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#define TZSVC_STATUS_FILE_ERROR 0x01 // Flag to indicate a file or directory error.
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#define TZSVC_STATUS_REQUEST 0xFE // Flag to indicate Z80 has posted a request.
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#define TZSVC_STATUS_PROCESSING 0xFF // Flag to indicate the K64F is processing a command.
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#define TZSVC_OPEN 0x00 // Service request to open a directory or file.
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#define TZSVC_NEXT 0x01 // Service request to return the next directory block or file block or write the next file block.
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#define TZSVC_CLOSE 0x02 // Service request to close open dir/file.
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// Constants for the Sharp MZ80A MZF file format.
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#define MZF_HEADER_SIZE 128 // Size of the MZF header.
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#define MZF_ATTRIBUTE 0x00 // Code Type, 01 = Machine Code.
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#define MZF_FILENAME 0x01 // Title/Name (17 bytes).
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#define MZF_FILENAME_LEN 17 // Length of the filename, it is not NULL terminated, generally a CR can be taken as terminator but not guaranteed.
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#define MZF_FILESIZE 0x12 // Size of program.
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#define MZF_LOADADDR 0x14 // Load address of program.
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#define MZF_EXECADDR 0x16 // Exec address of program.
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#define MZF_COMMENT 0x18 // Comment, used for details of the file or startup code.
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#define MZF_COMMENT_LEN 104 // Length of the comment field.
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// Constants for other handled file formats.
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//
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#define CAS_HEADER_SIZE 256 // Size of the CASsette header.
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// Pin Constants - Pins assigned at the hardware level to specific tasks/signals.
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//
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#define MAX_TRANZPUTER_PINS 53
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#define Z80_MEM0_PIN 16
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#define Z80_MEM1_PIN 17
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#define Z80_MEM2_PIN 19
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#define Z80_MEM3_PIN 18
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#define Z80_MEM4_PIN 49
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#define ENIOWAIT_PIN 50
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#define Z80_WR_PIN 48
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#define Z80_RD_PIN 55
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#define Z80_IORQ_PIN 8
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#define Z80_MREQ_PIN 7
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#define Z80_A0_PIN 15
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#define Z80_A1_PIN 22
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#define Z80_A2_PIN 23
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#define Z80_A3_PIN 9
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#define Z80_A4_PIN 10
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#define Z80_A5_PIN 13
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#define Z80_A6_PIN 11
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#define Z80_A7_PIN 12
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#define Z80_A8_PIN 35
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#define Z80_A9_PIN 36
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#define Z80_A10_PIN 37
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#define Z80_A11_PIN 38
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#define Z80_A12_PIN 3
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#define Z80_A13_PIN 4
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#define Z80_A14_PIN 26
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#define Z80_A15_PIN 27
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#define Z80_A16_PIN 33
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#define Z80_A17_PIN 34
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#define Z80_A18_PIN 24
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#define Z80_D0_PIN 0
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#define Z80_D1_PIN 1
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#define Z80_D2_PIN 29
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#define Z80_D3_PIN 30
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#define Z80_D4_PIN 43
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#define Z80_D5_PIN 46
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#define Z80_D6_PIN 44
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#define Z80_D7_PIN 45
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#define Z80_WAIT_PIN 54
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#define Z80_BUSACK_PIN 5
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#define Z80_NMI_PIN 39
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#define Z80_INT_PIN 28
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#define Z80_RESET_PIN 6
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#define SYSCLK_PIN 25
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#define CTL_RFSH_PIN 53
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#define CTL_HALT_PIN 51
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#define CTL_M1_PIN 20
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#define CTL_BUSRQ_PIN 2
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#define CTL_BUSACK_PIN 21
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#define CTL_CLK_PIN 14
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#define CTL_CLKSLCT_PIN 47
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#define TZ_BUSACK_PIN 52
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#define TZ_SVCREQ_PIN 56
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#define TZ_SYSREQ_PIN 57
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// IRQ mask values for the different types of IRQ trigger.
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//
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#define IRQ_MASK_CHANGE 0x10B0000
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#define IRQ_MASK_RISING 0x1090000 //0x040040
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#define IRQ_MASK_FALLING 0x10A0000
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#define IRQ_MASK_LOW 0x1080000
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#define IRQ_MASK_HIGH 0x10C0000
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// Customised pin manipulation methods implemented as stripped down macros. The original had too much additional overhead with procedure call and validation tests,
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// speed is of the essence for this project as pins change mode and value constantly.
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//
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// Studying the Teensyduino code these macros could be stripped down further and go direct to the BITBAND registers if more speed is needed.
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//
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#define STR(x) #x
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#define XSTR(s) STR(s)
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#define pinLow(a) *portClearRegister(pinMap[a]) = 1
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#define pinHigh(a) *portSetRegister(pinMap[a]) = 1
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#define pinSet(a, b) if(b) { *portSetRegister(pinMap[a]) = 1; } else { *portClearRegister(pinMap[a]) = 1; }
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#define pinGet(a) *portInputRegister(pinMap[a])
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#define pinInput(a) { *portModeRegister(pinMap[a]) = 0; *ioPin[a] = PORT_PCR_MUX(1) | PORT_PCR_PE | PORT_PCR_PS; }
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#define pinOutput(a) { *portModeRegister(pinMap[a]) = 1;\
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*ioPin[a] = PORT_PCR_SRE | PORT_PCR_DSE | PORT_PCR_MUX(1);\
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*ioPin[a] &= ~PORT_PCR_ODE; }
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#define pinOutputSet(a,b) { *portModeRegister(pinMap[a]) = 1;\
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*ioPin[a] = PORT_PCR_SRE | PORT_PCR_DSE | PORT_PCR_MUX(1);\
|
|
*ioPin[a] &= ~PORT_PCR_ODE;\
|
|
if(b) { *portSetRegister(pinMap[a]) = 1; } else { *portClearRegister(pinMap[a]) = 1; } }
|
|
#define installIRQ(a, mask) { uint32_t cfg;\
|
|
cfg = *ioPin[a];\
|
|
cfg &= ~0x000F0000;\
|
|
*ioPin[a] = cfg;\
|
|
cfg |= mask;\
|
|
*ioPin[a] = cfg;\
|
|
}
|
|
#define removeIRQ(a) { \
|
|
*ioPin[a] = ((*ioPin[a] & ~0x000F0000) | 0x01000000);\
|
|
}
|
|
#define pinIndex(a) getPinIndex(pinMap[a])
|
|
|
|
#define setZ80Data(a) { GPIOB_PDOR = (GPIOB_PDOR & 0xff00ffff) | ((a << 16) & 0x00ff0000); }
|
|
#define setZ80Addr(a) { GPIOA_PDOR = (GPIOA_PDOR & 0xffff0fff) | (a & 0x00000f000); GPIOC_PDOR = (GPIOC_PDOR & 0xfffff000) | (a & 0x00000fff); }
|
|
#define setZ80AddrLower(a) { GPIOC_PDOR = (GPIOC_PDOR & 0xffffff00) | (a & 0x000000ff); }
|
|
#define setZ80RefreshAddr(a) { GPIOC_PDOR = (GPIOC_PDOR & 0xffffff80) | (a & 0x0000007f); }
|
|
#define readZ80AddrLower() ( GPIOC_PDIR & 0x000000ff )
|
|
#define readZ80Addr() ( (GPIOA_PDIR & 0x00000f000) | (GPIOC_PDIR & 0x00000fff) )
|
|
#define readZ80DataBus() ( (GPIOB_PDIR >> 16) & 0x000000ff )
|
|
#define readCtrlLatch() ( GPIOB_PDIR & 0x0000003f )
|
|
#define writeCtrlLatch(a) { writeZ80IO(IO_TZ_CTRLLATCH, a); }
|
|
#define setZ80Direction(a) { for(uint8_t idx=Z80_D0; idx <= Z80_D7; idx++) { if(a == WRITE) { pinOutput(idx); } else { pinInput(idx); } }; z80Control.busDir = a; }
|
|
#define reqZ80BusChange(a) { if(a == MAINBOARD_ACCESS && z80Control.ctrlMode == TRANZPUTER_ACCESS) \
|
|
{\
|
|
pinHigh(CTL_BUSACK);\
|
|
z80Control.ctrlMode = MAINBOARD_ACCESS;\
|
|
z80Control.curCtrlLatch = TZMM_ORIG | TZMM_ENIOWAIT;\
|
|
writeCtrlLatch(z80Control.curCtrlLatch);\
|
|
} else if(a == TRANZPUTER_ACCESS && z80Control.ctrlMode == MAINBOARD_ACCESS)\
|
|
{\
|
|
pinLow(CTL_BUSACK);\
|
|
z80Control.ctrlMode = TRANZPUTER_ACCESS;\
|
|
z80Control.curCtrlLatch = TZMM_TZPU7 | TZMM_ENIOWAIT;\
|
|
writeCtrlLatch(z80Control.curCtrlLatch);\
|
|
} }
|
|
// Lower level macro without pin mapping as this is called in the ResetHandler to halt the Z80 whilst the K64F starts up and is able to load up tranZPUter software.
|
|
#define holdZ80() { \
|
|
*portModeRegister(CTL_BUSRQ_PIN) = 1; \
|
|
*portConfigRegister(CTL_BUSRQ_PIN) = PORT_PCR_SRE | PORT_PCR_DSE | PORT_PCR_MUX(1); \
|
|
*portConfigRegister(CTL_BUSRQ_PIN) &= ~PORT_PCR_ODE; \
|
|
*portClearRegister(CTL_BUSRQ_PIN) = 1; \
|
|
}
|
|
|
|
|
|
|
|
// Enumeration of the various pins on the project. These enums make it easy to refer to a signal and they are mapped
|
|
// to the actual hardware pin via the pinMap array.
|
|
// One of the big advantages is that a swath of pins, such as the address lines, can be switched in a tight loop rather than
|
|
// individual pin assignments or clunky lists.
|
|
//
|
|
enum pinIdxToPinNumMap {
|
|
Z80_A0 = 0,
|
|
Z80_A1 = 1,
|
|
Z80_A2 = 2,
|
|
Z80_A3 = 3,
|
|
Z80_A4 = 4,
|
|
Z80_A5 = 5,
|
|
Z80_A6 = 6,
|
|
Z80_A7 = 7,
|
|
Z80_A8 = 8,
|
|
Z80_A9 = 9,
|
|
Z80_A10 = 10,
|
|
Z80_A11 = 11,
|
|
Z80_A12 = 12,
|
|
Z80_A13 = 13,
|
|
Z80_A14 = 14,
|
|
Z80_A15 = 15,
|
|
Z80_A16 = 16,
|
|
Z80_A17 = 17,
|
|
Z80_A18 = 18,
|
|
|
|
Z80_D0 = 19,
|
|
Z80_D1 = 20,
|
|
Z80_D2 = 21,
|
|
Z80_D3 = 22,
|
|
Z80_D4 = 23,
|
|
Z80_D5 = 24,
|
|
Z80_D6 = 25,
|
|
Z80_D7 = 26,
|
|
|
|
Z80_MEM0 = 27,
|
|
Z80_MEM1 = 28,
|
|
Z80_MEM2 = 29,
|
|
Z80_MEM3 = 30,
|
|
Z80_MEM4 = 31,
|
|
ENIOWAIT = 32,
|
|
|
|
Z80_IORQ = 33,
|
|
Z80_MREQ = 34,
|
|
Z80_RD = 35,
|
|
Z80_WR = 36,
|
|
Z80_WAIT = 37,
|
|
Z80_BUSACK = 38,
|
|
|
|
Z80_NMI = 39,
|
|
Z80_INT = 40,
|
|
Z80_RESET = 41,
|
|
MB_SYSCLK = 42,
|
|
TZ_BUSACK = 43,
|
|
TZ_SVCREQ = 44,
|
|
TZ_SYSREQ = 45,
|
|
|
|
CTL_BUSACK = 46,
|
|
CTL_BUSRQ = 47,
|
|
CTL_RFSH = 48,
|
|
CTL_HALT = 49,
|
|
CTL_M1 = 50,
|
|
CTL_CLK = 51,
|
|
CTL_CLKSLCT = 52
|
|
};
|
|
|
|
// Possible control modes that the K64F can be in, do nothing where the Z80 runs normally, control the Z80 and mainboard, or control the Z80 and tranZPUter.
|
|
enum CTRL_MODE {
|
|
Z80_RUN = 0,
|
|
TRANZPUTER_ACCESS = 1,
|
|
MAINBOARD_ACCESS = 2
|
|
};
|
|
|
|
// Possible bus directions that the K64F can setup for controlling the Z80.
|
|
enum BUS_DIRECTION {
|
|
READ = 0,
|
|
WRITE = 1,
|
|
TRISTATE = 2
|
|
};
|
|
|
|
// Possible video frames stored internally.
|
|
//
|
|
enum VIDEO_FRAMES {
|
|
SAVED = 0,
|
|
WORKING = 1
|
|
};
|
|
|
|
// Possible machines the tranZPUter can emulate.
|
|
//
|
|
enum MACHINE_MODE {
|
|
MZ80A = 0,
|
|
MZ700 = 1,
|
|
MZ80B = 2
|
|
};
|
|
|
|
// Types of file which have handlers and can be processed.
|
|
//
|
|
enum FILE_TYPE {
|
|
MZF = 0, // Sharp MZF tape image files.
|
|
CAS = 1, // BASIC CASsette image files.
|
|
BAS = 2, // BASic ASCII text script files.
|
|
ALL = 10, // All files to be considered.
|
|
ALLFMT = 11 // Special case for directory listings, all files but truncated and formatted.
|
|
};
|
|
|
|
// Structure to define a Sharp MZ80A MZF directory structure. This header appears at the beginning of every Sharp MZ80A tape (and more recently archived/emulator) images.
|
|
//
|
|
typedef struct __attribute__((__packed__)) {
|
|
uint8_t attr; // MZF attribute describing the file.
|
|
uint8_t fileName[MZF_FILENAME_LEN]; // Each directory entry is the size of an MZF filename.
|
|
uint16_t fileSize; // Size of file.
|
|
uint16_t loadAddr; // Load address for the file.
|
|
uint16_t execAddr; // Execution address where the Z80 starts processing.
|
|
uint8_t comment[MZF_COMMENT_LEN]; // Text comment field but often contains a startup machine code program.
|
|
} t_svcDirEnt;
|
|
|
|
// Structure to define a compacted Sharp MZ80A MZF directory structure (no comment) for use in directory listings.
|
|
// This header appears at the beginning of every Sharp MZ80A tape (and more recently archived/emulator) images.
|
|
//
|
|
typedef struct __attribute__((__packed__)) {
|
|
uint8_t attr; // MZF attribute describing the file.
|
|
uint8_t fileName[MZF_FILENAME_LEN]; // Each directory entry is the size of an MZF filename.
|
|
uint16_t fileSize; // Size of file.
|
|
uint16_t loadAddr; // Load address for the file.
|
|
uint16_t execAddr; // Execution address where the Z80 starts processing.
|
|
uint8_t filler[MZF_FILLER_LEN]; // Filler to pad to a power of 2 length.
|
|
} t_svcCmpDirEnt;
|
|
|
|
// Structure to hold the map betwen an SD filename and the Sharp file it contains. The file is an MZF format file with a 128 byte header
|
|
// and this header contains the name understood on the Sharp MZ80A.
|
|
//
|
|
typedef struct __attribute__((__packed__)) {
|
|
uint8_t *sdFileName; // Name of file on the SD card.
|
|
t_svcCmpDirEnt mzfHeader; // Compact Sharp header data of this file.
|
|
} t_sharpToSDMap;
|
|
|
|
// Structure to define the control information for a CP/M disk drive.
|
|
//
|
|
typedef struct {
|
|
uint8_t *fileName; // FQFN of the CPM disk image file.
|
|
uint32_t lastTrack; // Track of last successful operation.
|
|
uint32_t lastSector; // Sector of last successful operation.
|
|
FIL File; // Opened file handle of the CPM disk image.
|
|
} t_cpmDrive;
|
|
|
|
// Structure to define which CP/M drives are added to the system, mapping a number from CP/M into a record containing the details of the file on the SD card.
|
|
//
|
|
typedef struct {
|
|
t_cpmDrive *drive[CPM_MAX_DRIVES]; // 1:1 map of CP/M drive number to an actual file on the SD card.
|
|
} t_cpmDriveMap;
|
|
|
|
// Structure to hold a map of an entire directory of files on the SD card and their associated Sharp MZ0A filename.
|
|
typedef struct __attribute__((__packed__)) {
|
|
uint8_t valid; // Is this mapping valid?
|
|
uint8_t entries; // Number of entries in cache.
|
|
uint8_t type; // Type of file being cached.
|
|
char directory[TZSVC_DIRNAME_SIZE]; // Directory this mapping is associated with.
|
|
union {
|
|
t_sharpToSDMap *mzfFile[TZSVC_MAX_DIR_ENTRIES]; // File mapping of SD file to its Sharp MZ80A name.
|
|
uint8_t *sdFileName[TZSVC_MAX_DIR_ENTRIES]; // No mapping for SD filenames, just the file name.
|
|
};
|
|
} t_dirMap;
|
|
|
|
|
|
// Structure to maintain all MZ700 hardware control information in order to emulate the machine.
|
|
//
|
|
typedef struct {
|
|
uint32_t config; // Compacted control register, 31:19 = reserved, 18 = Inhibit mode, 17 = Upper D000:FFFF is RAM (=1), 16 = Lower 0000:0FFF is RAM (=1), 15:8 = old memory mode, 7:0 = current memory mode.
|
|
//uint8_t memoryMode; // The memory mode the MZ700 is currently running under, this is determined by the memory control commands from the MZ700.
|
|
//uint8_t lockMemoryMode; // The preserved memory mode when entering the locked state.
|
|
//uint8_t inhibit; // The inhibit flag, blocks the upper 0xD000:0xFFFF region from being accessed, affects the memoryMode temporarily.
|
|
//uint8_t update; // Update flag, indicates to the ISR that a memory mode update is needed.
|
|
//uint8_t b0000; // Block 0000:0FFF mode.
|
|
//uint8_t bD000; // Block D000:FFFF mode.
|
|
} t_mz700;
|
|
|
|
// Structure to maintain all MZ-80B hardware control information in oder to emulate the machine as near as possible.
|
|
typedef struct {
|
|
uint32_t config; // Compacted control register, 31:19 = reserved, 18 = Inhibit mode, 17 = Upper D000:FFFF is RAM (=1), 16 = Lower 0000:0FFF is RAM (=1), 15:8 = old memory mode, 7:0 = current memory mode.
|
|
} t_mz80b;
|
|
|
|
// Structure to maintain all the control and management variables of the Z80 and underlying hardware so that the state of run is well known by any called method.
|
|
//
|
|
typedef struct {
|
|
#ifndef __APP__
|
|
uint32_t svcControlAddr; // Address of the service control record within the 512K static RAM bank.
|
|
uint8_t refreshAddr; // Refresh address for times when the K64F must issue refresh cycles on the Z80 bus.
|
|
uint8_t disableRefresh; // Disable refresh if the mainboard DRAM isnt being used.
|
|
uint8_t runCtrlLatch; // Latch value the Z80 is running with.
|
|
uint8_t curCtrlLatch; // Latch value set during tranZPUter access of the Z80 bus.
|
|
uint8_t videoRAM[2][2048]; // Two video memory buffer frames, allows for storage of original frame in [0] and working frame in [1].
|
|
uint8_t attributeRAM[2][2048]; // Two attribute memory buffer frames, allows for storage of original frame in [0] and working frame in [1].
|
|
|
|
enum CTRL_MODE ctrlMode; // Mode of control, ie normal Z80 Running, controlling mainboard, controlling tranZPUter.
|
|
enum BUS_DIRECTION busDir; // Direction the bus has been configured for.
|
|
|
|
enum MACHINE_MODE machineMode; // Machine compatibility, 0 = Sharp MZ-80A, 1 = MZ-700, 2 = MZ-80B
|
|
t_mz700 mz700; // MZ700 emulation control to detect IO commands and adjust the memory map accordingly.
|
|
t_mz80b mz80b; // MZ-80B emulation control to detect IO commands and adjust the memory map and I/O forwarding accordingly.
|
|
|
|
uint8_t resetEvent; // A Z80_RESET event occurred, probably user pressing RESET button.
|
|
uint8_t svcRequest; // A service request has been made by the Z80 (1).
|
|
uint8_t sysRequest; // A system request has been made by the Z80 (1).
|
|
uint8_t ioAddr; // Address of a Z80 IO instruction.
|
|
uint8_t ioEvent; // Event flag to indicate that an IO instruction was captured.
|
|
uint8_t ioData; // Data of a Z80 IO instruction.
|
|
uint8_t memorySwap; // A memory Swap event has occurred, 0000-0FFF -> C000-CFFF (1), or C000-CFFF -> 0000-0FFF (0)
|
|
uint8_t crtMode; // A CRT event has occurred, Normal mode (0) or Reverse Mode (1)
|
|
uint8_t scroll; // Hardware scroll offset.
|
|
volatile uint32_t portA; // ISR store of GPIO Port A used for signal decoding.
|
|
volatile uint32_t portB; // ISR store of GPIO Port B used for signal decoding.
|
|
volatile uint32_t portC; // ISR store of GPIO Port C used for signal decoding.
|
|
volatile uint32_t portD; // ISR store of GPIO Port D used for signal decoding.
|
|
volatile uint32_t portE; // ISR store of GPIO Port E used for signal decoding.
|
|
#endif
|
|
} t_z80Control;
|
|
|
|
// Structure to maintain higher level OS control and management variables typically used for TZFS and CPM.
|
|
//
|
|
typedef struct {
|
|
uint8_t tzAutoBoot; // Autoboot the tranZPUter into TZFS mode.
|
|
t_dirMap dirMap; // Directory map of SD filenames to Sharp MZ80A filenames.
|
|
t_cpmDriveMap cpmDriveMap; // Map of file number to an open SD disk file to be used as a CPM drive.
|
|
uint8_t *lastFile; // Last file loaded - typically used for CPM to reload itself.
|
|
} t_osControl;
|
|
|
|
// Structure to contain inter CPU communications memory for command service processing and results.
|
|
// Typically the z80 places a command into the structure in it's memory space and asserts an I/O request,
|
|
// the K64F detects the request and reads the lower portion of the struct from z80 memory space,
|
|
// determines the command and then either reads the remainder or writes to the remainder. This struct
|
|
// exists in both the z80 and K64F domains and data is sync'd between them as needed.
|
|
//
|
|
typedef struct __attribute__((__packed__)) {
|
|
uint8_t cmd; // Command request.
|
|
uint8_t result; // Result code. 0xFE - set by Z80, command available, 0xFE - set by K64F, command ack and processing. 0x00-0xF0 = cmd complete and result of processing.
|
|
union {
|
|
uint8_t dirSector; // Virtual directory sector number.
|
|
uint8_t fileSector; // Sector within open file to read/write.
|
|
};
|
|
uint16_t trackNo; // For virtual drives with track and sector this is the track number
|
|
uint16_t sectorNo; // For virtual drives with tracl and sector this is the sector number.
|
|
uint8_t fileNo; // File number of a file within the last directory listing to open/update.
|
|
uint8_t fileType; // Type of file being processed.
|
|
union {
|
|
uint16_t loadAddr; // Load address for ROM/File images which need to be dynamic.
|
|
uint16_t saveAddr; // Save address for ROM/File images which need to be dynamic.
|
|
uint16_t cpuFreq; // CPU Frequency in KHz - used for setting of the alternate CPU clock frequency.
|
|
};
|
|
union {
|
|
uint16_t loadSize; // Size for ROM/File to be loaded.
|
|
uint16_t saveSize; // Size for ROM/File to be saved.
|
|
};
|
|
uint8_t directory[TZSVC_DIRNAME_SIZE]; // Directory in which to look for a file. If no directory is given default to MZF.
|
|
uint8_t filename[TZSVC_FILENAME_SIZE]; // File to open or create.
|
|
uint8_t wildcard[TZSVC_WILDCARD_SIZE]; // A basic wildcard pattern match filter to be applied to a directory search.
|
|
uint8_t sector[TZSVC_SECTOR_SIZE]; // Sector buffer generally for disk read/write.
|
|
} t_svcControl;
|
|
|
|
// Structure to define all the directory entries which are packed into a single SD sector which is used between the Z80<->K64F.
|
|
//
|
|
typedef struct __attribute__((__packed__)) {
|
|
t_svcDirEnt dirEnt[TZVC_MAX_DIRENT_BLOCK]; // Fixed number of directory entries per sector/block.
|
|
} t_svcDirBlock;
|
|
|
|
// Structure to hold compacted directory entries which are packed into a single SD sector which is used between the Z80<->K64F.
|
|
//
|
|
typedef struct __attribute__((__packed__)) {
|
|
t_svcCmpDirEnt dirEnt[TZVC_MAX_CMPCT_DIRENT_BLOCK];// Fixed number of compacted directory entries per sector/block.
|
|
} t_svcCmpDirBlock;
|
|
|
|
// Mapping table from Sharp MZ80A Ascii to real Ascii.
|
|
//
|
|
typedef struct {
|
|
uint8_t asciiCode;
|
|
} t_asciiMap;
|
|
|
|
// Application execution constants.
|
|
//
|
|
|
|
// For the ARM Cortex-M compiler, the standard filestreams in an app are set by the CRT0 startup code,
|
|
// the original reentrant definition is undefined as it is not needed in the app.
|
|
#if defined __APP__ && defined __K64F__
|
|
#undef stdout
|
|
#undef stdin
|
|
#undef stderr
|
|
FILE *stdout;
|
|
FILE *stdin;
|
|
FILE *stderr;
|
|
#endif
|
|
|
|
// References to variables within the main library code.
|
|
extern volatile uint32_t *ioPin[MAX_TRANZPUTER_PINS];
|
|
extern uint8_t pinMap[MAX_TRANZPUTER_PINS];
|
|
|
|
// Prototypes.
|
|
//
|
|
#if defined __APP__
|
|
void yield(void);
|
|
#endif
|
|
void setupZ80Pins(uint8_t, volatile uint32_t *);
|
|
void resetZ80(void);
|
|
uint8_t reqZ80Bus(uint32_t);
|
|
uint8_t reqMainboardBus(uint32_t);
|
|
uint8_t reqTranZPUterBus(uint32_t);
|
|
void setupSignalsForZ80Access(enum BUS_DIRECTION);
|
|
void releaseZ80(void);
|
|
void refreshZ80(void);
|
|
void setCtrlLatch(uint8_t);
|
|
uint32_t setZ80CPUFrequency(float, uint8_t);
|
|
uint8_t copyFromZ80(uint8_t *, uint32_t, uint32_t, uint8_t);
|
|
uint8_t copyToZ80(uint32_t, uint8_t *, uint32_t, uint8_t);
|
|
uint8_t writeZ80Memory(uint16_t, uint8_t);
|
|
uint8_t readZ80Memory(uint16_t);
|
|
uint8_t writeZ80IO(uint16_t, uint8_t);
|
|
uint8_t readZ80IO(uint16_t);
|
|
void fillZ80Memory(uint32_t, uint32_t, uint8_t, uint8_t);
|
|
void captureVideoFrame(enum VIDEO_FRAMES, uint8_t);
|
|
void refreshVideoFrame(enum VIDEO_FRAMES, uint8_t, uint8_t);
|
|
FRESULT loadVideoFrameBuffer(char *, enum VIDEO_FRAMES);
|
|
FRESULT saveVideoFrameBuffer(char *, enum VIDEO_FRAMES);
|
|
char *getVideoFrame(enum VIDEO_FRAMES);
|
|
char *getAttributeFrame(enum VIDEO_FRAMES);
|
|
FRESULT loadZ80Memory(const char *, uint32_t, uint32_t, uint32_t, uint32_t *, uint8_t, uint8_t);
|
|
FRESULT saveZ80Memory(const char *, uint32_t, uint32_t, t_svcDirEnt *, uint8_t);
|
|
FRESULT loadMZFZ80Memory(const char *, uint32_t, uint32_t *, uint8_t, uint8_t);
|
|
|
|
// Getter/Setter methods!
|
|
uint8_t isZ80Reset(void);
|
|
uint8_t isZ80MemorySwapped(void);
|
|
uint8_t getZ80IO(uint8_t *);
|
|
void clearZ80Reset(void);
|
|
void convertSharpFilenameToAscii(char *, char *, uint8_t);
|
|
|
|
// tranZPUter OS i/f methods.
|
|
uint8_t setZ80SvcStatus(uint8_t);
|
|
void svcSetDefaults(enum FILE_TYPE);
|
|
uint8_t svcReadDir(uint8_t, enum FILE_TYPE);
|
|
uint8_t svcFindFile(char *, char *, uint8_t, enum FILE_TYPE);
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uint8_t svcReadDirCache(uint8_t, enum FILE_TYPE);
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uint8_t svcFindFileCache(char *, char *, uint8_t, enum FILE_TYPE);
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uint8_t svcCacheDir(const char *, enum FILE_TYPE, uint8_t);
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uint8_t svcReadFile(uint8_t, enum FILE_TYPE);
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uint8_t svcWriteFile(uint8_t, enum FILE_TYPE);
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uint8_t svcLoadFile(enum FILE_TYPE);
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uint8_t svcSaveFile(enum FILE_TYPE);
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uint8_t svcEraseFile(enum FILE_TYPE);
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uint8_t svcAddCPMDrive(void);
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uint8_t svcReadCPMDrive(void);
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uint8_t svcWriteCPMDrive(void);
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uint32_t getServiceAddr(void);
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void processServiceRequest(void);
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void loadTranZPUterDefaultROMS(void);
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void tranZPUterControl(void);
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uint8_t testTZFSAutoBoot(void);
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void setupTranZPUter(void);
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#if defined __APP__
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int memoryDumpZ80(uint32_t, uint32_t, uint32_t, uint8_t, uint8_t);
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#endif
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// Debug methods.
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#if defined __APP__ && defined __TZPU_DEBUG__
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void displaySignals(void);
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif // TRANZPUTER_H
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