562 lines
34 KiB
NASM
562 lines
34 KiB
NASM
;--------------------------------------------------------------------------------------------------------
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;-
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;- Name: CPM_Definitions.asm
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;- Created: January 2020
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;- Author(s): Philip Smart
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;- Description: Sharp MZ series CPM v2.23
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;- Definitions for the Sharp MZ80A CPM v2.23 OS used in the RFS
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;-
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;- Credits:
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;- Copyright: (c) 2019-20 Philip Smart <philip.smart@net2net.org>
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;-
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;- History: Jan 2020 - Initial version.
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; May 2020 - Advent of the new RFS PCB v2.0, quite a few changes to accommodate the
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; additional and different hardware. The SPI is now onboard the PCB and
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; not using the printer interface card.
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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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;-----------------------------------------------
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; Features.
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;-----------------------------------------------
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HW_SPI_ENA EQU 1 ; Set to 1 if hardware SPI is present on the RFS PCB v2 board.
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SW_SPI_ENA EQU 0 ; Set to 1 if software SPI is present on the RFS PCB v2 board.
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PP_SPI_ENA EQU 0 ; Set to 1 if using the SPI interface via the Parallel Port, ie. for RFS PCB v1 which doesnt have SPI onboard.
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;-----------------------------------------------
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; Entry/compilation start points.
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;-----------------------------------------------
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CBIOSSTART EQU 0C000h
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CBIOSDATA EQU CBIOSSTART - 0400H
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UROMADDR EQU 0E800H ; Start of User ROM Address space.
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FDCROMADDR EQU 0F000H
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CBASE EQU 0A000H
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CPMCCP EQU CBASE ; CP/M System entry
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CPMBDOS EQU CPMCCP + 0806H ; BDOS entry
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CPMBIOS EQU CPMCCP + 01600H ; Original CPM22 BIOS entry
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BOOT EQU CBIOSSTART + 0
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WBOOT EQU CBIOSSTART + 3
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WBOOTE EQU CBIOSSTART + 3
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CONST EQU CBIOSSTART + 6
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CONIN EQU CBIOSSTART + 9
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CONOUT EQU CBIOSSTART + 12
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LIST EQU CBIOSSTART + 15
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PUNCH EQU CBIOSSTART + 18
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READER EQU CBIOSSTART + 21
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HOME EQU CBIOSSTART + 24
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SELDSK EQU CBIOSSTART + 27
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SETTRK EQU CBIOSSTART + 30
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SETSEC EQU CBIOSSTART + 33
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SETDMA EQU CBIOSSTART + 36
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READ EQU CBIOSSTART + 39
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WRITE EQU CBIOSSTART + 42
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FRSTAT EQU CBIOSSTART + 45
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SECTRN EQU CBIOSSTART + 48
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UNUSED EQU CBIOSSTART + 51
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BANKTOBANK EQU CBIOSSTART + 54
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CCP EQU CBASE
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CCPCLRBUF EQU CBASE + 3
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DPBASE EQU CPMBIOS
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CDIRBUF EQU CPMBIOS + (MAXDISKS * 16)
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CSVALVMEM EQU CDIRBUF + 128
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CSVALVEND EQU CSVALVMEM + 1253
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IOBYT EQU 00003H ; IOBYTE address
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CDISK EQU 00004H ; Address of Current drive name and user number
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CPMUSERDMA EQU 00080h ; Default CPM User DMA address.
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DPSIZE EQU 16 ; Size of a Disk Parameter Block
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DPBLOCK0 EQU SCRN - (8 * DPSIZE) ; Location of the 1st DPB in the CBIOS Rom.
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DPBLOCK1 EQU DPBLOCK0 + DPSIZE
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DPBLOCK2 EQU DPBLOCK1 + DPSIZE
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DPBLOCK3 EQU DPBLOCK2 + DPSIZE
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DPBLOCK4 EQU DPBLOCK3 + DPSIZE
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DPBLOCK5 EQU DPBLOCK4 + DPSIZE
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DPBLOCK6 EQU DPBLOCK5 + DPSIZE
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DPBLOCK7 EQU DPBLOCK6 + DPSIZE
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;-----------------------------------------------
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; Configurable settings.
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;-----------------------------------------------
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MAXRDRETRY EQU 002h
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MAXWRRETRY EQU 002h
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BLKSIZ EQU 4096 ; CP/M allocation size
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HSTSIZ EQU 512 ; host disk sector size
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HSTSPT EQU 32 ; host disk sectors/trk
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HSTBLK EQU HSTSIZ/128 ; CP/M sects/host buff
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CPMSPT EQU HSTBLK * HSTSPT ; CP/M sectors/track
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SECMSK EQU HSTBLK-1 ; sector mask
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WRALL EQU 0 ; write to allocated
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WRDIR EQU 1 ; write to directory
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WRUAL EQU 2 ; write to unallocated
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TMRTICKINTV EQU 5 ; Number of 0.010mSec ticks per interrupt, ie. resolution of RTC.
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MTROFFMSECS EQU 100 ; Time from last access to motor being switched off in seconds in TMRTICKINTV ticks.
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COLW: EQU 80 ; Width of the display screen (ie. columns).
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ROW: EQU 25 ; Number of rows on display screen.
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SCRNSZ: EQU COLW * ROW ; Total size, in bytes, of the screen display area.
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SCRLW: EQU COLW / 8 ; Number of 8 byte regions in a line for hardware scroll.
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MODE80C: EQU 1
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ROMDRVSIZE: EQU 320 ; Size in K of the Rom RFS Drive, currently 240 or 320 are coded. Please set value in make_cpmdisks.sh when changing this parameter.
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; BIOS equates
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MAXDISKS EQU 7 ; Max number of Drives supported
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KEYBUFSIZE EQU 16 ; Ensure this is a power of 2, max size 256.
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; Debugging
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ENADEBUG EQU 0 ; Enable debugging logic, 1 = enable, 0 = disable
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;-------------------------------------------------------
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; Function entry points in the CBIOS ROMS
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;-------------------------------------------------------
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UROMJMPTBL EQU UROMADDR + 00020H ; Position at beginning of each bank of an API jump table of public methods in the bank
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; Public functions in CBIOS User ROM Bank 1 - utility functions, ie. Audio.
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QREBOOT EQU 0 + UROMJMPTBL
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QMELDY EQU 3 + UROMJMPTBL
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QTEMP EQU 6 + UROMJMPTBL
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QMSTA EQU 9 + UROMJMPTBL
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QMSTP EQU 12 + UROMJMPTBL
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QBEL EQU 15 + UROMJMPTBL
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QMODE EQU 18 + UROMJMPTBL
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QTIMESET EQU 21 + UROMJMPTBL
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QTIMEREAD EQU 24 + UROMJMPTBL
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QCHKKY EQU 27 + UROMJMPTBL
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QGETKY EQU 30 + UROMJMPTBL
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; Public functions in CBIOS User ROM Bank 2 - Screen / ANSI terminal functions.
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QPRNT EQU 0 + UROMJMPTBL
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QPRTHX EQU 3 + UROMJMPTBL
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QPRTHL EQU 6 + UROMJMPTBL
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QANSITERM EQU 9 + UROMJMPTBL
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; Public functions in CBIOS User ROM Bank 3 - SD Card functions.
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SD_INIT EQU 0 + UROMJMPTBL
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SD_READ EQU 3 + UROMJMPTBL
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SD_WRITE EQU 6 + UROMJMPTBL
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SD_GETLBA EQU 9 + UROMJMPTBL
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SDC_READ EQU 12 + UROMJMPTBL
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SDC_WRITE EQU 15 + UROMJMPTBL
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; Public functions in CBIOS User ROM Bank 4 - Floppy Disk Controller functions.
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QDSKINIT EQU 0 + UROMJMPTBL
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QSETDRVCFG EQU 3 + UROMJMPTBL
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QSETDRVMAP EQU 6 + UROMJMPTBL
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QSELDRIVE EQU 9 + UROMJMPTBL
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QGETMAPDSK EQU 12 + UROMJMPTBL
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QDSKREAD EQU 15 + UROMJMPTBL
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QDSKWRITE EQU 18 + UROMJMPTBL
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;-----------------------------------------------
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; Memory mapped ports in hardware.
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;-----------------------------------------------
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SCRN: EQU 0D000H
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ARAM: EQU 0D800H
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DSPCTL: EQU 0DFFFH ; Screen 40/80 select register (bit 7)
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KEYPA: EQU 0E000h
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KEYPB: EQU 0E001h
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KEYPC: EQU 0E002h
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KEYPF: EQU 0E003h
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CSTR: EQU 0E002h
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CSTPT: EQU 0E003h
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CONT0: EQU 0E004h
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CONT1: EQU 0E005h
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CONT2: EQU 0E006h
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CONTF: EQU 0E007h
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SUNDG: EQU 0E008h
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TEMP: EQU 0E008h
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MEMSW: EQU 0E00CH
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MEMSWR: EQU 0E010H
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INVDSP: EQU 0E014H
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NRMDSP: EQU 0E015H
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SCLDSP: EQU 0E200H
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SCLBASE: EQU 0E2H
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BNKCTRLRST: EQU 0EFF8H ; Bank control reset, returns all registers to power up default.
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BNKCTRLDIS: EQU 0EFF9H ; Disable bank control registers by resetting the coded latch.
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HWSPIDATA: EQU 0EFFBH ; Hardware SPI Data register (read/write).
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HWSPISTART: EQU 0EFFCH ; Start an SPI transfer.
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BNKSELMROM: EQU 0EFFDh ; Select RFS Bank1 (MROM)
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BNKSELUSER: EQU 0EFFEh ; Select RFS Bank2 (User ROM)
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BNKCTRL: EQU 0EFFFH ; Bank Control register (read/write).
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;
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; RFS v2 Control Register constants.
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;
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BBCLK EQU 1 ; BitBang SPI Clock.
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SDCS EQU 2 ; SD Card Chip Select, active low.
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BBMOSI EQU 4 ; BitBang MOSI (Master Out Serial In).
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CDLTCH1 EQU 8 ; Coded latch up count bit 1
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CDLTCH2 EQU 16 ; Coded latch up count bit 2
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CDLTCH3 EQU 32 ; Coded latch up count bit 3
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BK2A19 EQU 64 ; User ROM Device Select Bit 0 (or Address bit 19).
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BK2A20 EQU 128 ; User ROM Device Select Bit 1 (or Address bit 20).
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; BK2A20 : BK2A19
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; 0 0 = Flash RAM 0 (default).
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; 0 1 = Flash RAM 1.
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; 1 0 = Flasm RAM 2 or Static RAM 0.
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; 1 1 = Reserved.
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BNKCTRLDEF EQU BBMOSI+SDCS+BBCLK ; Default on startup for the Bank Control register.
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;-----------------------------------------------
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; IO ports in hardware and values.
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;-----------------------------------------------
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SPI_OUT EQU 0FFH
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SPI_IN EQU 0FEH
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;
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DOUT_LOW EQU 000H
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DOUT_HIGH EQU 004H
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DOUT_MASK EQU 004H
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DIN_LOW EQU 000H
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DIN_HIGH EQU 001H
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CLOCK_LOW EQU 000H
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CLOCK_HIGH EQU 002H
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CLOCK_MASK EQU 0FDH
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CS_LOW EQU 000H
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CS_HIGH EQU 001H
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;-----------------------------------------------
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; Rom File System Header (MZF)
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;-----------------------------------------------
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RFS_ATRB: EQU 00000h ; Code Type, 01 = Machine Code.
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RFS_NAME: EQU 00001h ; Title/Name (17 bytes).
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RFS_SIZE: EQU 00012h ; Size of program.
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RFS_DTADR: EQU 00014h ; Load address of program.
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RFS_EXADR: EQU 00016h ; Exec address of program.
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RFS_COMNT: EQU 00018h ; COMMENT
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MZFHDRSZ EQU 128 ; Full MZF Header size
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MZFHDRNCSZ EQU 24 ; Only the primary MZF data, no comment field.
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RFSSECTSZ EQU 256
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MROMSIZE EQU 4096
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UROMSIZE EQU 2048
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BANKSPERTRACK EQU (ROMSECTORSIZE * ROMSECTORS) / UROMSIZE ; (8) We currently only use the UROM for disk images.
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SECTORSPERBANK EQU UROMSIZE / ROMSECTORSIZE ; (16)
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SECTORSPERBLOCK EQU RFSSECTSZ/ROMSECTORSIZE ; (2)
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ROMSECTORSIZE EQU 128
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ROMSECTORS EQU 128
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;ROMBK1: EQU 01016H ; CURRENT MROM BANK
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;ROMBK2: EQU 01017H ; CURRENT USERROM BANK
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;WRKROMBK1: EQU 01018H ; WORKING MROM BANK
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;WRKROMBK2: EQU 01019H ; WORKING USERROM BANK
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;-----------------------------------------------
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; ROM Banks, 0-7 are reserved for alternative
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; Monitor versions, CPM and RFS
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; code in MROM bank,
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; 0-7 are reserved for RFS code in
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; the User ROM bank.
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; 8-15 are reserved for CPM code in
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; the User ROM bank.
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;-----------------------------------------------
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MROMPAGES EQU 8
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USRROMPAGES EQU 12 ; Monitor ROM : User ROM
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ROMBANK0 EQU 0 ; MROM SA1510 40 Char : RFS Bank 0 - Main RFS Entry point and functions.
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ROMBANK1 EQU 1 ; MROM SA1510 80 Char : RFS Bank 1 - Floppy disk controller and utilities.
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ROMBANK2 EQU 2 ; CPM 2.2 CBIOS : RFS Bank 2 - SD Card controller and utilities.
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ROMBANK3 EQU 3 ; RFS Utilities : RFS Bank 3 - Cmdline tools (Memory, Printer, Help)
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ROMBANK4 EQU 4 ; Free : RFS Bank 4 - CMT Utilities.
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ROMBANK5 EQU 5 ; Free : RFS Bank 5
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ROMBANK6 EQU 6 ; Free : RFS Bank 6
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ROMBANK7 EQU 7 ; Free : RFS Bank 7 - Memory and timer test utilities.
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ROMBANK8 EQU 8 ; : CBIOS Bank 1 - Utilities
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ROMBANK9 EQU 9 ; : CBIOS Bank 2 - Screen / ANSI Terminal
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ROMBANK10 EQU 10 ; : CBIOS Bank 3 - SD Card
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ROMBANK11 EQU 11 ; : CBIOS Bank 4 - Floppy disk controller.
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OBJCD EQU 001h
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;-----------------------------------------------
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; IO Registers
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;-----------------------------------------------
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FDC EQU 0D8h ; MB8866 IO Region 0D8h - 0DBh
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FDC_CR EQU 000h + FDC ; Command Register
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FDC_STR EQU 000h + FDC ; Status Register
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FDC_TR EQU 001h + FDC ; Track Register
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FDC_SCR EQU 002h + FDC ; Sector Register
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FDC_DR EQU 003h + FDC ; Data Register
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FDC_MOTOR EQU 004h + FDC ; DS[0-3] and Motor control. 4 drives DS= BIT 0 -> Bit 2 = Drive number, 2=1,1=0,0=0 DS0, 2=1,1=0,0=1 DS1 etc
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; bit 7 = 1 MOTOR ON LOW (Active)
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FDC_SIDE EQU 005h + FDC ; Side select, Bit 0 when set = SIDE SELECT LOW
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;-----------------------------------------------
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; Common character definitions.
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;-----------------------------------------------
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SCROLL EQU 001H ;Set scroll direction UP.
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BELL EQU 007H
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SPACE EQU 020H
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TAB EQU 009H ;TAB ACROSS (8 SPACES FOR SD-BOARD)
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CR EQU 00DH
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LF EQU 00AH
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FF EQU 00CH
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DELETE EQU 07FH
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BACKS EQU 008H
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SOH EQU 1 ; For XModem etc.
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EOT EQU 4
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ACK EQU 6
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NAK EQU 015H
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NUL EQU 000H
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NULL EQU 000H
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CTRL_A EQU 001H
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CTRL_B EQU 002H
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CTRL_C EQU 003H
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CTRL_D EQU 004H
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CTRL_E EQU 005H
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CTRL_F EQU 006H
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CTRL_G EQU 007H
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CTRL_H EQU 008H
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CTRL_I EQU 009H
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CTRL_J EQU 00AH
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CTRL_K EQU 00BH
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CTRL_L EQU 00CH
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CTRL_M EQU 00DH
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CTRL_N EQU 00EH
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CTRL_O EQU 00FH
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CTRL_P EQU 010H
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CTRL_Q EQU 011H
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CTRL_R EQU 012H
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CTRL_S EQU 013H
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CTRL_T EQU 014H
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CTRL_U EQU 015H
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CTRL_V EQU 016H
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CTRL_W EQU 017H
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CTRL_X EQU 018H
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CTRL_Y EQU 019H
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CTRL_Z EQU 01AH
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ESC EQU 01BH
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CTRL_SLASH EQU 01CH
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CTRL_RB EQU 01DH
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CTRL_CAPPA EQU 01EH
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CTRL_UNDSCR EQU 01FH
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CTRL_AT EQU 000H
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NOKEY EQU 0F0H
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CURSRIGHT EQU 0F1H
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CURSLEFT EQU 0F2H
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CURSUP EQU 0F3H
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CURSDOWN EQU 0F4H
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DBLZERO EQU 0F5H
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INSERT EQU 0F6H
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CLRKEY EQU 0F7H
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HOMEKEY EQU 0F8H
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BREAKKEY EQU 0FBH
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; MMC/SD command (SPI mode)
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CMD0 EQU 64 + 0 ; GO_IDLE_STATE
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CMD1 EQU 64 + 1 ; SEND_OP_COND
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ACMD41 EQU 0x40+41 ; SEND_OP_COND (SDC)
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CMD8 EQU 64 + 8 ; SEND_IF_COND
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CMD9 EQU 64 + 9 ; SEND_CSD
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CMD10 EQU 64 + 10 ; SEND_CID
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CMD12 EQU 64 + 12 ; STOP_TRANSMISSION
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CMD13 EQU 64 + 13 ; SEND_STATUS
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ACMD13 EQU 0x40+13 ; SD_STATUS (SDC)
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CMD16 EQU 64 + 16 ; SET_BLOCKLEN
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CMD17 EQU 64 + 17 ; READ_SINGLE_BLOCK
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CMD18 EQU 64 + 18 ; READ_MULTIPLE_BLOCK
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CMD23 EQU 64 + 23 ; SET_BLOCK_COUNT
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ACMD23 EQU 0x40+23 ; SET_WR_BLK_ERASE_COUNT (SDC)
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CMD24 EQU 64 + 24 ; WRITE_BLOCK
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CMD25 EQU 64 + 25 ; WRITE_MULTIPLE_BLOCK
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CMD32 EQU 64 + 32 ; ERASE_ER_BLK_START
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CMD33 EQU 64 + 33 ; ERASE_ER_BLK_END
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CMD38 EQU 64 + 38 ; ERASE
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CMD55 EQU 64 + 55 ; APP_CMD
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CMD58 EQU 64 + 58 ; READ_OCR
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; Card type flags (CardType)
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CT_MMC EQU 001H ; MMC ver 3
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CT_SD1 EQU 002H ; SD ver 1
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CT_SD2 EQU 004H ; SD ver 2
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CT_SDC EQU CT_SD1|CT_SD2 ; SD
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CT_BLOCK EQU 008H ; Block addressing
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; Disk types.
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DSKTYP_FDC EQU 0 ; Type of disk is a Floppy disk and handled by the FDC controller.
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DSKTYP_ROM EQU 1 ; Type of disk is a ROM and handled by the ROM methods.
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DSKTYP_SDC EQU 2 ; Type of disk is an SD Card and handled by the SD Card methods.
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;
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; Rom Filing System constants.
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;
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RFS_DIRENT EQU 256 ; Directory entries in the RFS directory.
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RFS_DIRENTSZ EQU 32 ; Size of a directory entry.
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RFS_DIRSIZE EQU RFS_DIRENT * RFS_DIRENTSZ ; Total size of the directory.
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RFS_BLOCKSZ EQU 65536 ; Size of a file block per directory entry.
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RFS_IMGSZ EQU RFS_DIRSIZE + (RFS_DIRENT * RFS_BLOCKSZ) ; Total size of the RFS image.
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;
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; CPM constants
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;
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CPM_SD_SEC EQU 32
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CPM_SD_TRK EQU 1024
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CPM_SD_IMGSZ EQU CPM_SD_TRK * CPM_SD_SEC * SD_SECSIZE
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;
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; SD Card constants.
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;
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SD_SECSIZE EQU 512 ; Default size of an SD Sector
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SD_SECPTRK EQU CPM_SD_SEC ; Sectors of SD_SECSIZE per virtual track.
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SD_TRACKS EQU CPM_SD_TRK ; Number of virtual tracks per disk image.
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;-----------------------------------------------
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; BIOS WORK AREA (MZ80A)
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;-----------------------------------------------
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ORG CBIOSDATA
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; Keyboard processing, ensure starts where LSB = 0.
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VARSTART EQU $ ; Start of variables.
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KEYBUF: DS virtual KEYBUFSIZE ; Interrupt driven keyboard buffer.
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KEYCOUNT: DS virtual 1
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KEYWRITE: DS virtual 2 ; Pointer into the buffer where the next character should be placed.
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KEYREAD: DS virtual 2 ; Pointer into the buffer where the next character can be read.
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KEYLAST: DS virtual 1 ; KEY LAST VALUE
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KEYRPT: DS virtual 1 ; KEY REPEAT COUNTER
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USRBANKSAV: DS virtual 1 ; Save user bank number when calling another user bank.
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HLSAVE: DS virtual 2 ; Space to save HL register when manipulating stack.
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ROMCTL DS virtual 1 ; Rom Paging control register contents.
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;
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SPV:
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IBUFE: ; TAPE BUFFER (128 BYTES)
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ATRB: DS virtual 1 ; ATTRIBUTE
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NAME: DS virtual 17 ; FILE NAME
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SIZE: DS virtual 2 ; BYTESIZE
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DTADR: DS virtual 2 ; DATA ADDRESS
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EXADR: DS virtual 2 ; EXECUTION ADDRESS
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SWPW: DS virtual 10 ; SWEEP WORK
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KDATW: DS virtual 2 ; KEY WORK
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;KANAF: DS virtual 1 ; KANA FLAG (01=GRAPHIC MODE)
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DSPXY: DS virtual 2 ; DISPLAY COORDINATES
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;DSPXYLST: DS virtual 2 ; Last known cursor position, to compare with DSPXY to detect changes.
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FLASHCTL: DS virtual 1 ; CURSOR FLASH CONTROL. BIT 0 = Cursor On/Off, BIT 1 = Cursor displayed.
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DSPXYADDR: DS virtual 2 ; Address of last known position.
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MANG: DS virtual 6 ; COLUMN MANAGEMENT
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MANGE: DS virtual 1 ; COLUMN MANAGEMENT END
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PBIAS: DS virtual 1 ; PAGE BIAS
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ROLTOP: DS virtual 1 ; ROLL TOP BIAS
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MGPNT: DS virtual 1 ; COLUMN MANAG. POINTER
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PAGETP: DS virtual 2 ; PAGE TOP
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ROLEND: DS virtual 1 ; ROLL END
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DS virtual 14 ; BIAS
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FLASH: DS virtual 1 ; FLASHING DATA
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SFTLK: DS virtual 1 ; SHIFT LOCK
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REVFLG: DS virtual 1 ; REVERSE FLAG
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FLSDT: DS virtual 1 ; CURSOR DATA
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STRGF: DS virtual 1 ; STRING FLAG
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DPRNT: DS virtual 1 ; TAB COUNTER
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;AMPM: DS virtual 1 ; AMPM DATA
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;TIMFG: DS virtual 1 ; TIME FLAG
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SWRK: DS virtual 1 ; KEY SOUND FLAG
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TEMPW: DS virtual 1 ; TEMPO WORK
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ONTYO: DS virtual 1 ; ONTYO WORK
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OCTV: DS virtual 1 ; OCTAVE WORK
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RATIO: DS virtual 2 ; ONPU RATIO
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;BUFER: DS virtual 81 ; GET LINE BUFFER
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;KEYBUF: DS virtual 1 ; KEY BUFFER
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DRVAVAIL DS virtual 1 ; Flag to indicate which drive controllers are available. Bit 2 = SD, Bit 1 = ROM, Bit 0 = FDC
|
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TIMESEC DS virtual 6 ; RTC 48bit TIME IN MILLISECONDS
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FDCCMD DS virtual 1 ; LAST FDC COMMAND SENT TO CONTROLLER.
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MOTON DS virtual 1 ; MOTOR ON = 1, OFF = 0
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INVFDCDATA: DS virtual 1 ; INVERT DATA COMING FROM FDC, 1 = INVERT, 0 = AS IS
|
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TRK0FD1 DS virtual 1 ; FD 1 IS AT TRACK 0 = BIT 0 set
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TRK0FD2 DS virtual 1 ; FD 2 IS AT TRACK 0 = BIT 0 set
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TRK0FD3 DS virtual 1 ; FD 3 IS AT TRACK 0 = BIT 0 set
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TRK0FD4 DS virtual 1 ; FD 4 IS AT TRACK 0 = BIT 0 set
|
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RETRIES DS virtual 2 ; DATA READ RETRIES
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TMPADR DS virtual 2 ; TEMPORARY ADDRESS STORAGE
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TMPSIZE DS virtual 2 ; TEMPORARY SIZE
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TMPCNT DS virtual 2 ; TEMPORARY COUNTER
|
|
;
|
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CPMROMLOC: DS virtual 2 ; Upper Byte = ROM Bank, Lower Byte = Page of CPM Image.
|
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CPMROMDRV0: DS virtual 2 ; Upper Byte = ROM Bank, Lower Byte = Page of CPM Rom Drive Image Disk 0.
|
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CPMROMDRV1: DS virtual 2 ; Upper Byte = ROM Bank, Lower Byte = Page of CPM Rom Drive Image Disk 1.
|
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NDISKS: DS virtual 1 ; Dynamically calculated number of disks on boot.
|
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DISKMAP: DS virtual MAXDISKS ; Disk map of CPM logical to physical controller disk.
|
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FDCDISK: DS virtual 1 ; Physical disk number.
|
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SECPERTRK: DS virtual 1 ; Sectors per track for 1 head.
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SECPERHEAD: DS virtual 1 ; Sectors per head.
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SECTORCNT: DS virtual 1 ; Sector size as a count of how many sectors make 512 bytes.
|
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DISKTYPE: DS virtual 1 ; Disk type of current selection.
|
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MTROFFTIMER:DS virtual 1 ; Second down counter for FDC motor off.
|
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;
|
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SEKDSK: DS virtual 1 ; Seek disk number
|
|
SEKTRK: DS virtual 2 ; Seek disk track
|
|
SEKSEC: DS virtual 1 ; Seek sector number
|
|
SEKHST: DS virtual 1 ; Seek sector host
|
|
;
|
|
HSTDSK: DS virtual 1 ; Host disk number
|
|
HSTTRK: DS virtual 2 ; Host track number
|
|
HSTSEC: DS virtual 1 ; Host sector number
|
|
HSTWRT: DS virtual 1 ; Host write flag
|
|
HSTACT: DS virtual 1 ;
|
|
;
|
|
UNACNT: DS virtual 1 ; Unalloc rec cnt
|
|
UNADSK: DS virtual 1 ; Last unalloc disk
|
|
UNATRK: DS virtual 2 ; Last unalloc track
|
|
UNASEC: DS virtual 1 ; Last unalloc sector
|
|
;
|
|
ERFLAG: DS virtual 1 ; Error number, 0 = no error.
|
|
READOP: DS virtual 1 ; If read operation then 1, else 0 for write.
|
|
RSFLAG: DS virtual 1 ; Read sector flag.
|
|
WRTYPE: DS virtual 1 ; Write operation type.
|
|
TRACKNO: DS virtual 2 ; Host controller track number
|
|
SECTORNO: DS virtual 1 ; Host controller sector number
|
|
DMAADDR: DS virtual 2 ; Last DMA address
|
|
HSTBUF: DS virtual 512 ; Host buffer for disk sector storage
|
|
HSTBUFE:
|
|
|
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SDVER: DS virtual 1 ; SD Card version.
|
|
SDCAP: DS virtual 1 ; SD Card capabilities..
|
|
SDSTARTSEC DS virtual 4 ; Starting sector of data to read/write from/to SD card.
|
|
SDBUF: DS virtual 11 ; SD Card command fram buffer for the command and response storage.
|
|
|
|
CURSORPSAV DS virtual 2 ; Cursor save position;default 0,0
|
|
HAVELOADED DS virtual 1 ; To show that a value has been put in for Ansi emualtor.
|
|
ANSIFIRST DS virtual 1 ; Holds first character of Ansi sequence
|
|
NUMBERBUF DS virtual 20 ; Buffer for numbers in Ansi
|
|
NUMBERPOS DS virtual 2 ; Address within buffer
|
|
CHARACTERNO DS virtual 1 ; Byte within Ansi sequence. 0=first,255=other
|
|
CURSORCOUNT DS virtual 1 ; 1/50ths of a second since last change
|
|
FONTSET DS virtual 1 ; Ansi font setup.
|
|
JSW_FF DS virtual 1 ; Byte value to turn on/off FF routine
|
|
JSW_LF DS virtual 1 ; Byte value to turn on/off LF routine
|
|
CHARACTER DS virtual 1 ; To buffer character to be printed.
|
|
CURSORPOS DS virtual 2 ; Cursor position, default 0,0.
|
|
BOLDMODE DS virtual 1
|
|
HIBRITEMODE DS virtual 1 ; 0 means on, &C9 means off
|
|
UNDERSCMODE DS virtual 1
|
|
ITALICMODE DS virtual 1
|
|
INVMODE DS virtual 1
|
|
CHGCURSMODE DS virtual 1
|
|
ANSIMODE DS virtual 1 ; 1 = on, 0 = off
|
|
COLOUR EQU 0
|
|
|
|
SPSAVE: DS virtual 2 ; CPM Stack save.
|
|
SPISRSAVE: DS virtual 2
|
|
; Stack space for the CBIOS.
|
|
MSGSTRBUF: DS virtual 128 ; Lower end of the stack space is for interbank message printing, ie.space for a string to print.
|
|
BIOSSTACK EQU $
|
|
; Stack space for the Interrupt Service Routine.
|
|
DS virtual 16 ; Max 8 stack pushes.
|
|
ISRSTACK EQU $
|
|
|
|
DBGSTACKP: DS virtual 2
|
|
DS virtual 64
|
|
DBGSTACK: EQU $
|
|
|
|
VAREND EQU $ ; End of variables
|