eaw/Main
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity
Files
b592d0841686445f7caf26112408261c1f981295
Main/st_tos.cpp
sorgelig 0c1eff9334 Some minor fixes.
2018-06-25 01:23:19 +08:00

1155 lines
28 KiB
C++
Raw Blame History

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "hardware.h"
#include "menu.h"
#include "st_tos.h"
#include "file_io.h"
#include "debug.h"
#include "user_io.h"
#include "st_ikbd.h"
#include "fpga_io.h"
#define CONFIG_FILENAME "MIST.CFG"
typedef struct {
unsigned long system_ctrl; // system control word
char tos_img[1024];
char cart_img[1024];
char acsi_img[2][1024];
char video_adjust[2];
char sd_direct;
} tos_config_t;
static tos_config_t config;
#define TOS_BASE_ADDRESS_192k 0xfc0000
#define TOS_BASE_ADDRESS_256k 0xe00000
#define CART_BASE_ADDRESS 0xfa0000
#define VIDEO_BASE_ADDRESS 0x010000
static unsigned char font[2048]; // buffer for 8x16 atari font
// two floppies
static struct {
fileTYPE file;
unsigned char sides;
unsigned char spt;
} fdd_image[2] = { 0 };
// one harddisk
fileTYPE hdd_image[2] = { 0 };
unsigned long hdd_direct = 0;
static unsigned char dma_buffer[512];
static const char *acsi_cmd_name(int cmd) {
static const char *cmdname[] = {
"Test Drive Ready", "Restore to Zero", "Cmd $2", "Request Sense",
"Format Drive", "Read Block limits", "Reassign Blocks", "Cmd $7",
"Read Sector", "Cmd $9", "Write Sector", "Seek Block",
"Cmd $C", "Cmd $D", "Cmd $E", "Cmd $F",
"Cmd $10", "Cmd $11", "Inquiry", "Verify",
"Cmd $14", "Mode Select", "Cmd $16", "Cmd $17",
"Cmd $18", "Cmd $19", "Mode Sense", "Start/Stop Unit",
"Cmd $1C", "Cmd $1D", "Cmd $1E", "Cmd $1F",
// extended commands supported by ICD feature:
"Cmd $20", "Cmd $21", "Cmd $22",
"Read Format Capacities", "Cmd $24", "Read Capacity (10)",
"Cmd $26", "Cmd $27", "Read (10)", "Read Generation",
"Write (10)", "Seek (10)"
};
if (cmd > 0x2b) return NULL;
return cmdname[cmd];
}
void tos_set_video_adjust(char axis, char value) {
config.video_adjust[axis] += value;
EnableFpga();
spi8(MIST_SET_VADJ);
spi8(config.video_adjust[0]);
spi8(config.video_adjust[1]);
DisableFpga();
}
char tos_get_video_adjust(char axis) {
return config.video_adjust[axis];
}
static void mist_memory_set_address(unsigned long a, unsigned char s, char rw) {
// printf("set addr = %x, %d, %d\n", a, s, rw);
a |= rw ? 0x1000000 : 0;
a >>= 1;
EnableFpga();
spi8(MIST_SET_ADDRESS);
spi8(s);
spi8((a >> 16) & 0xff);
spi8((a >> 8) & 0xff);
spi8((a >> 0) & 0xff);
DisableFpga();
}
static void mist_set_control(unsigned long ctrl) {
EnableFpga();
spi8(MIST_SET_CONTROL);
spi8((ctrl >> 24) & 0xff);
spi8((ctrl >> 16) & 0xff);
spi8((ctrl >> 8) & 0xff);
spi8((ctrl >> 0) & 0xff);
DisableFpga();
}
static void mist_memory_read(char *data, unsigned long words) {
EnableFpga();
spi8(MIST_READ_MEMORY);
// transmitted bytes must be multiple of 2 (-> words)
while (words--) {
*data++ = spi_in();
*data++ = spi_in();
}
DisableFpga();
}
static void mist_memory_write(unsigned char *data, unsigned long words) {
EnableFpga();
spi8(MIST_WRITE_MEMORY);
while (words--) {
spi8(*data++);
spi8(*data++);
}
DisableFpga();
}
static void mist_memory_read_block(unsigned char *data) {
EnableFpga();
spi8(MIST_READ_MEMORY);
spi_block_read(data,0);
DisableFpga();
}
static void mist_memory_write_block(unsigned char *data) {
EnableFpga();
spi8(MIST_WRITE_MEMORY);
spi_block_write(data,0);
DisableFpga();
}
void mist_memory_set(char data, unsigned long words) {
EnableFpga();
spi8(MIST_WRITE_MEMORY);
while (words--) {
spi8(data);
spi8(data);
}
DisableFpga();
}
// enable direct sd card access on acsi0
void tos_set_direct_hdd(char on) {
config.sd_direct = 0;
tos_debugf("ACSI: disable direct sd access");
config.system_ctrl &= ~TOS_ACSI0_ENABLE;
hdd_direct = 0;
// check if image access should be enabled instead
if (hdd_image[0].size) {
tos_debugf("ACSI: re-enabling image on ACSI0");
config.system_ctrl |= TOS_ACSI0_ENABLE;
}
mist_set_control(config.system_ctrl);
}
char tos_get_direct_hdd() {
return 0;
}
static void dma_ack(unsigned char status) {
EnableFpga();
spi8(MIST_ACK_DMA);
spi8(status);
DisableFpga();
}
static void dma_nak(void) {
EnableFpga();
spi8(MIST_NAK_DMA);
DisableFpga();
}
static void handle_acsi(unsigned char *buffer) {
static unsigned char asc[2] = { 0,0 };
unsigned char target = buffer[19] >> 5;
unsigned char device = buffer[10] >> 5;
unsigned char cmd = buffer[9];
unsigned int dma_address = 256 * 256 * buffer[0] +
256 * buffer[1] + (buffer[2] & 0xfe);
unsigned char scnt = buffer[3];
unsigned long lba = 256 * 256 * (buffer[10] & 0x1f) +
256 * buffer[11] + buffer[12];
unsigned short length = buffer[13];
if (length == 0) length = 256;
if (user_io_dip_switch1()) {
tos_debugf("ACSI: target %d.%d, \"%s\" (%02x)", target, device, acsi_cmd_name(cmd), cmd);
tos_debugf("ACSI: lba %lu (%lx), length %u", lba, lba, length);
tos_debugf("DMA: scnt %u, addr %p", scnt, dma_address);
if (buffer[20] == 0xa5) {
tos_debugf("DMA: fifo %d/%d %x %s",
(buffer[21] >> 4) & 0x0f, buffer[21] & 0x0f,
buffer[22], (buffer[2] & 1) ? "OUT" : "IN");
tos_debugf("DMA stat=%x, mode=%x, fdc_irq=%d, acsi_irq=%d",
buffer[23], buffer[24], buffer[25], buffer[26]);
}
}
// only a harddisk on ACSI 0/1 is supported
// ACSI 0/1 is only supported if a image is loaded
// ACSI 0 is only supported for direct IO
if (((target < 2) && (hdd_image[target].size != 0)) ||
((target == 0) && hdd_direct)) {
unsigned long blocks = hdd_image[target].size / 512;
// if in hdd direct mode then hdd_direct contains device sizee
if (hdd_direct && target == 0) blocks = hdd_direct;
// only lun0 is fully supported
switch (cmd) {
case 0x25:
if (device == 0) {
bzero(dma_buffer, 512);
dma_buffer[0] = (blocks - 1) >> 24;
dma_buffer[1] = (blocks - 1) >> 16;
dma_buffer[2] = (blocks - 1) >> 8;
dma_buffer[3] = (blocks - 1) >> 0;
dma_buffer[6] = 2; // 512 bytes per block
mist_memory_write(dma_buffer, 4);
dma_ack(0x00);
asc[target] = 0x00;
}
else {
dma_ack(0x02);
asc[target] = 0x25;
}
break;
case 0x00: // test drive ready
case 0x04: // format
if (device == 0) {
asc[target] = 0x00;
dma_ack(0x00);
}
else {
asc[target] = 0x25;
dma_ack(0x02);
}
break;
case 0x03: // request sense
if (device != 0)
asc[target] = 0x25;
bzero(dma_buffer, 512);
dma_buffer[7] = 0x0b;
if (asc[target] != 0) {
dma_buffer[2] = 0x05;
dma_buffer[12] = asc[target];
}
mist_memory_write(dma_buffer, 9); // 18 bytes
dma_ack(0x00);
asc[target] = 0x00;
break;
case 0x08: // read sector
case 0x28: // read (10)
if (device == 0) {
if (cmd == 0x28) {
lba =
256 * 256 * 256 * buffer[11] +
256 * 256 * buffer[12] +
256 * buffer[13] +
buffer[14];
length = 256 * buffer[16] + buffer[17];
// printf("READ(10) %d, %d\n", lba, length);
}
if (lba + length <= blocks) {
DISKLED_ON;
while (length) {
FileSeekLBA(&hdd_image[target], lba++);
FileRead(&hdd_image[target], dma_buffer);
// hexdump(dma_buffer, 32, 0);
mist_memory_write_block(dma_buffer);
length--;
}
DISKLED_OFF;
dma_ack(0x00);
asc[target] = 0x00;
}
else {
tos_debugf("ACSI: read (%d+%d) exceeds device limits (%d)",
lba, length, blocks);
dma_ack(0x02);
asc[target] = 0x21;
}
}
else {
dma_ack(0x02);
asc[target] = 0x25;
}
break;
case 0x0a: // write sector
case 0x2a: // write (10)
if (device == 0) {
if (cmd == 0x2a) {
lba =
256 * 256 * 256 * buffer[11] +
256 * 256 * buffer[12] +
256 * buffer[13] +
buffer[14];
length = 256 * buffer[16] + buffer[17];
// printf("WRITE(10) %d, %d\n", lba, length);
}
if (lba + length <= blocks) {
DISKLED_ON;
while (length) {
mist_memory_read_block(dma_buffer);
FileSeekLBA(&hdd_image[target], lba++);
FileWrite(&hdd_image[target], dma_buffer);
length--;
}
DISKLED_OFF;
dma_ack(0x00);
asc[target] = 0x00;
}
else {
tos_debugf("ACSI: write (%d+%d) exceeds device limits (%d)",
lba, length, blocks);
dma_ack(0x02);
asc[target] = 0x21;
}
}
else {
dma_ack(0x02);
asc[target] = 0x25;
}
break;
case 0x12: // inquiry
if (hdd_direct && target == 0) tos_debugf("ACSI: Inquiry DIRECT");
else tos_debugf("ACSI: Inquiry %s", hdd_image[target].name);
bzero(dma_buffer, 512);
dma_buffer[2] = 2; // SCSI-2
dma_buffer[4] = length - 5; // len
memcpy(dma_buffer + 8, "MIST ", 8); // Vendor
memcpy(dma_buffer + 16, " ", 16); // Clear device entry
if (hdd_direct && target == 0) memcpy(dma_buffer + 16, "SD DIRECT", 9);// Device
else memcpy(dma_buffer + 16, hdd_image[target].name, 11);
memcpy(dma_buffer + 32, "ATH ", 4); // Product revision
memcpy(dma_buffer + 36, VDATE " ", 8); // Serial number
if (device != 0) dma_buffer[0] = 0x7f;
mist_memory_write(dma_buffer, length / 2);
dma_ack(0x00);
asc[target] = 0x00;
break;
case 0x1a: // mode sense
if (device == 0) {
tos_debugf("ACSI: mode sense, blocks = %u", blocks);
bzero(dma_buffer, 512);
dma_buffer[3] = 8; // size of extent descriptor list
dma_buffer[5] = blocks >> 16;
dma_buffer[6] = blocks >> 8;
dma_buffer[7] = blocks;
dma_buffer[10] = 2; // byte 1 of block size in bytes (512)
mist_memory_write(dma_buffer, length / 2);
dma_ack(0x00);
asc[target] = 0x00;
}
else {
asc[target] = 0x25;
dma_ack(0x02);
}
break;
#if 0
case 0x1f: // ICD command?
tos_debugf("ACSI: ICD command %s ($%02x)",
acsi_cmd_name(buffer[10] & 0x1f), buffer[10] & 0x1f);
asc[target] = 0x05;
dma_ack(0x02);
break;
#endif
default:
tos_debugf("ACSI: >>>>>>>>>>>> Unsupported command <<<<<<<<<<<<<<<<");
asc[target] = 0x20;
dma_ack(0x02);
break;
}
}
else {
tos_debugf("ACSI: Request for unsupported target");
// tell acsi state machine that io controller is done
// but don't generate a acsi irq
dma_nak();
}
}
static void handle_fdc(unsigned char *buffer) {
// extract contents
unsigned int dma_address = 256 * 256 * buffer[0] +
256 * buffer[1] + (buffer[2] & 0xfe);
unsigned char scnt = buffer[3];
unsigned char fdc_cmd = buffer[4];
unsigned char fdc_track = buffer[5];
unsigned char fdc_sector = buffer[6];
unsigned char fdc_data = buffer[7];
unsigned char drv_sel = 3 - ((buffer[8] >> 2) & 3);
unsigned char drv_side = 1 - ((buffer[8] >> 1) & 1);
// tos_debugf("FDC: sel %d, cmd %x", drv_sel, fdc_cmd);
// check if a matching disk image has been inserted
if (drv_sel && fdd_image[drv_sel - 1].file.size) {
// if the fdc has been asked to write protect the disks, then
// write sector commands should never reach the oi controller
// read/write sector command
if ((fdc_cmd & 0xc0) == 0x80) {
// convert track/sector/side into disk offset
unsigned int offset = drv_side;
offset += fdc_track * fdd_image[drv_sel - 1].sides;
offset *= fdd_image[drv_sel - 1].spt;
offset += fdc_sector - 1;
if (user_io_dip_switch1()) {
tos_debugf("FDC %s req %d sec (%c, SD:%d, T:%d, S:%d = %d) -> %p",
(fdc_cmd & 0x10) ? "multi" : "single", scnt,
'A' + drv_sel - 1, drv_side, fdc_track, fdc_sector, offset,
dma_address);
}
while (scnt) {
// check if requested sector is in range
if ((fdc_sector > 0) && (fdc_sector <= fdd_image[drv_sel - 1].spt)) {
DISKLED_ON;
FileSeek(&fdd_image[drv_sel - 1].file, offset, SEEK_SET);
if ((fdc_cmd & 0xe0) == 0x80) {
// read from disk ...
FileRead(&fdd_image[drv_sel - 1].file, dma_buffer);
// ... and copy to ram
mist_memory_write_block(dma_buffer);
}
else {
// read from ram ...
mist_memory_read_block(dma_buffer);
// ... and write to disk
FileWrite(&(fdd_image[drv_sel - 1].file), dma_buffer);
}
DISKLED_OFF;
}
else
tos_debugf("sector out of range");
scnt--;
dma_address += 512;
offset += 1;
}
dma_ack(0x00);
}
else if ((fdc_cmd & 0xc0) == 0xc0) {
char msg[32];
if ((fdc_cmd & 0xe0) == 0xc0) printf("READ ADDRESS\n");
if ((fdc_cmd & 0xf0) == 0xe0) {
printf("READ TRACK %d SIDE %d\n", fdc_track, drv_side);
sprintf(msg, "RD TRK %d S %d", fdc_track, drv_side);
InfoMessage(msg);
}
if ((fdc_cmd & 0xf0) == 0xf0) {
printf("WRITE TRACK %d SIDE %d\n", fdc_track, drv_side);
sprintf(msg, "WR TRK %d S %d", fdc_track, drv_side);
InfoMessage(msg);
}
printf("scnt = %d\n", scnt);
dma_ack(0x00);
}
}
}
static void mist_get_dmastate() {
unsigned char buffer[32];
EnableFpga();
spi8(MIST_GET_DMASTATE);
spi_read(buffer, 32,0);
DisableFpga();
// check if acsi is busy
if (buffer[19] & 0x01)
handle_acsi(buffer);
// check if fdc is busy
if (buffer[8] & 0x01)
handle_fdc(buffer);
}
// color test, used to test the shifter without CPU/TOS
#define COLORS 20
#define PLANES 4
static void tos_write(const char *str);
static void tos_color_test() {
unsigned short buffer[COLORS][PLANES];
int y;
for (y = 0; y<13; y++) {
int i, j;
for (i = 0; i<COLORS; i++)
for (j = 0; j<PLANES; j++)
buffer[i][j] = ((y + i) & (1 << j)) ? 0xffff : 0x0000;
for (i = 0; i<16; i++) {
mist_memory_set_address(VIDEO_BASE_ADDRESS + (16 * y + i) * 160, 1, 0);
mist_memory_write((unsigned char*)buffer, COLORS*PLANES);
}
}
#if 1
mist_memory_set_address(VIDEO_BASE_ADDRESS, 1, 0);
mist_memory_set(0xf0, 40);
mist_memory_set_address(VIDEO_BASE_ADDRESS + 80, 1, 0);
mist_memory_set(0x55, 40);
mist_memory_set_address(VIDEO_BASE_ADDRESS + 160, 1, 0);
mist_memory_set(0x0f, 40);
#if 1
tos_write("");
tos_write("AAAAAAAABBBBBBBBCCCCCCCCDDDDDDDDEEEEEEEEFFFFFFFFGGGGGGGGHHHHHHHHIIIIIIIIJJJJJJJJ");
tos_write("ABCDEFGHIJHKLMNOPQRSTUVWXYZ0123456789ABCDEFGHIJHKLMNOPQRSTUVWXYZ0123456789");
#endif
// for(;;);
#endif
}
static void tos_write(const char *str) {
static int y = 0;
int l;
// empty string is "cursor home"
if (!str) {
y = 0;
return;
}
// get next higher multiple of 16 for string length
// as dma works in 16 bytes chunks only
int c = (strlen(str) + 15) & ~15;
{
unsigned char *buffer = (unsigned char*)malloc(c);
// 16 pixel lines
for (l = 0; l<16; l++)
{
const char *p = str;
unsigned char *f = buffer;
while (*p) *f++ = font[16 * *p++ + l];
while (f < buffer + c) *f++ = font[16 * ' ' + l];
mist_memory_set_address(VIDEO_BASE_ADDRESS + 80 * (y + l), 1, 0);
mist_memory_write(buffer, c / 2);
}
free(buffer);
}
y += 16;
}
static void tos_clr() {
mist_memory_set_address(VIDEO_BASE_ADDRESS, (32000 + 511) / 512, 0);
mist_memory_set(0, 16000);
tos_write(NULL);
}
// the built-in OSD font, being used if everything else fails
extern unsigned char charfont[256][8];
static void tos_font_load() {
fileTYPE file = { 0 };
if (FileOpen(&file, "SYSTEM.FNT")) {
if (file.size == 4096) {
int i;
for (i = 0; i<4; i++) {
FileRead(&file, font + i * 512);
FileNextSector(&file);
}
return;
}
}
// if we couldn't load something, then just convert the
// built-on OSD font, so we see at least something
unsigned char c, l, n;
// copy 128 chars
for (c = 0; c<128; c++) {
// each character is 8 pixel tall
for (l = 0; l<8; l++) {
unsigned char *d = font + c * 16 + 2 * l;
*d = 0;
for (n = 0; n<8; n++)
if (charfont[c][n] & (1 << l))
*d |= 0x80 >> n;
*(d + 1) = *d;
}
}
}
void tos_load_cartridge(const char *name)
{
fileTYPE file = { 0 };
if (name)
strncpy(config.cart_img, name, 11);
// upload cartridge
if (config.cart_img[0] && FileOpen(&file, config.cart_img)) {
int i;
unsigned char buffer[512];
tos_debugf("%s:\n size = %d", config.cart_img, file.size);
int blocks = file.size / 512;
tos_debugf(" blocks = %d", blocks);
DISKLED_ON;
for (i = 0; i<blocks; i++) {
FileRead(&file, buffer);
if (!(i & 0x7f))
mist_memory_set_address(CART_BASE_ADDRESS + 512 * i, 128, 0);
mist_memory_write_block(buffer);
if (i != blocks - 1)
FileNextSector(&file);
}
DISKLED_OFF;
tos_debugf("%s uploaded", config.cart_img);
return;
}
// erase that ram area to remove any previously uploaded
// image
tos_debugf("Erasing cart memory");
mist_memory_set_address(CART_BASE_ADDRESS, 128, 0);
mist_memory_set(0, 64 * 1024 / 2);
mist_memory_set_address(CART_BASE_ADDRESS + 128 * 512, 128, 0);
mist_memory_set(0, 64 * 1024 / 2);
}
char tos_cartridge_is_inserted() {
return config.cart_img[0];
}
void tos_upload(const char *name)
{
fileTYPE file = { 0 };
// set video offset in fpga
tos_set_video_adjust(0, 0);
if (name)
strncpy(config.tos_img, name, 11);
// put cpu into reset
config.system_ctrl |= TOS_CONTROL_CPU_RESET;
mist_set_control(config.system_ctrl);
tos_font_load();
tos_clr();
// do the MiST core handling
tos_write("\x0e\x0f MIST core \x0e\x0f ");
tos_write("Uploading TOS ... ");
tos_debugf("Uploading TOS ...");
DISKLED_ON;
// upload and verify tos image
if (FileOpen(&file, config.tos_img)) {
int i;
unsigned char buffer[512];
unsigned long time;
unsigned long tos_base = TOS_BASE_ADDRESS_192k;
tos_debugf("TOS.IMG:\n size = %d", file.size);
if (file.size >= 256 * 1024)
tos_base = TOS_BASE_ADDRESS_256k;
else if (file.size != 192 * 1024)
tos_debugf("WARNING: Unexpected TOS size!");
int blocks = file.size / 512;
tos_debugf(" blocks = %d", blocks);
tos_debugf(" address = $%08x", tos_base);
// clear first 16k
mist_memory_set_address(0, 16384 / 512, 0);
mist_memory_set(0x00, 8192);
time = GetTimer(0);
tos_debugf("Uploading ...");
for (i = 0; i<blocks; i++) {
FileRead(&file, buffer);
// copy first 8 bytes to address 0 as well
if (i == 0) {
mist_memory_set_address(0, 1, 0);
// write first 4 words
// (actually 8 words/16 bytes as the dma cannot transfer less)
mist_memory_write(buffer, 8);
}
// send address every 64k (128 sectors) as dma can max transfer
// 255 sectors at once
// set real tos base address
if ((i & 0x7f) == 0)
mist_memory_set_address(tos_base + i * 512, 128, 0);
mist_memory_write_block(buffer);
if (i != blocks - 1)
FileNextSector(&file);
}
#if 1
// verify
if (user_io_dip_switch1()) {
char b2[512];
int j, ok;
FileSeekLBA(&file, 0);
for (i = 0; i<blocks; i++) {
if (!(i & 0x7f))
mist_memory_set_address(tos_base + i * 512, 128, 1);
FileRead(&file, b2);
mist_memory_read_block(buffer);
ok = -1;
for (j = 0; j<512; j++)
if (buffer[j] != b2[j])
if (ok < 0)
ok = j;
if (ok >= 0) {
printf("Failed in block %d/%x (%x != %x)\n", i, ok, 0xff & buffer[ok], 0xff & b2[ok]);
hexdump(buffer, 512, 0);
puts("");
hexdump(b2, 512, 0);
// re-read to check whether read or write failed
bzero(buffer, 512);
mist_memory_set_address(tos_base + i * 512, 1, 1);
mist_memory_read_block(buffer);
ok = -1;
for (j = 0; j<512; j++)
if (buffer[j] != b2[j])
if (ok < 0)
ok = j;
if (ok >= 0) {
printf("Re-read failed in block %d/%x (%x != %x)\n", i, ok, 0xff & buffer[ok], 0xff & b2[ok]);
hexdump(buffer, 512, 0);
}
else
printf("Re-read ok!\n");
for (;;);
}
if (i != blocks - 1)
FileNextSector(&file);
}
printf("Verify: %s\n", ok ? "ok" : "failed");
}
#endif
time = GetTimer(0) - time;
tos_debugf("TOS.IMG uploaded in %lu ms (%d kB/s / %d kBit/s)",
time >> 20, file.size / (time >> 20), 8 * file.size / (time >> 20));
}
else {
tos_debugf("Unable to find tos.img");
tos_write("Unable to find tos.img");
DISKLED_OFF;
return;
}
DISKLED_OFF;
// This is the initial boot if no name was given. Otherwise the
// user reloaded a new os
if (!name) {
// load
tos_load_cartridge(NULL);
// try to open both floppies
int i;
for (i = 0; i<2; i++) {
char msg[] = "Found floppy disk image for drive X: ";
char name[] = "DISK_A.ST";
msg[34] = name[5] = 'A' + i;
tos_insert_disk(i, name);
}
if (config.sd_direct) {
tos_set_direct_hdd(1);
tos_write("Enabling direct SD card access via ACSI0");
}
else {
// try to open harddisk image
for (i = 0; i<2; i++) {
if (FileOpen(&file, config.acsi_img[i]))
{
FileClose(&file);
char msg[] = "Found hard disk image for ACSIX";
msg[30] = '0' + i;
tos_write(msg);
tos_select_hdd_image(i, config.acsi_img[i]);
}
}
}
}
tos_write("Booting ... ");
// clear sector count register -> stop DMA
mist_memory_set_address(0, 0, 0);
ikbd_reset();
// let cpu run (release reset)
config.system_ctrl &= ~TOS_CONTROL_CPU_RESET;
mist_set_control(config.system_ctrl);
}
static unsigned long get_long(char *buffer, int offset) {
unsigned long retval = 0;
int i;
for (i = 0; i<4; i++)
retval = (retval << 8) + *(unsigned char*)(buffer + offset + i);
return retval;
}
void tos_poll() {
// 1 == button not pressed, 2 = 1 sec exceeded, else timer running
static unsigned long timer = 1;
mist_get_dmastate();
// check the user button
if (user_io_user_button()) {
if (timer == 1)
timer = GetTimer(1000);
else if (timer != 2)
if (CheckTimer(timer)) {
tos_reset(1);
timer = 2;
}
}
else {
// released while still running (< 1 sec)
if (!(timer & 3))
tos_reset(0);
timer = 1;
}
}
void tos_update_sysctrl(unsigned long n) {
// printf(">>>>>>>>>>>> set sys %x, eth is %s\n", n, (n&TOS_CONTROL_ETHERNET)?"on":"off");
// some of the usb drivers also call this without knowing which
// core is running. So make sure this only happens if the Atari ST (MIST)
// core is running
if (user_io_core_type() == CORE_TYPE_MIST) {
config.system_ctrl = n;
mist_set_control(config.system_ctrl);
}
}
static void nice_name(char *dest, char *src) {
char *c;
// copy and append nul
strncpy(dest, src, 8);
for (c = dest + 7; *c == ' '; c--); c++;
*c++ = '.';
strncpy(c, src + 8, 3);
for (c += 2; *c == ' '; c--); c++;
*c++ = '\0';
}
static char buffer[17]; // local buffer to assemble file name (8+3+2)
char *tos_get_disk_name(char index) {
fileTYPE file;
char *c;
if (index <= 1)
file = fdd_image[index].file;
else
file = hdd_image[index - 2];
if (!file.size) {
strcpy(buffer, "* no disk *");
return buffer;
}
nice_name(buffer, file.name);
return buffer;
}
char *tos_get_image_name() {
nice_name(buffer, config.tos_img);
return buffer;
}
char *tos_get_cartridge_name() {
if (!config.cart_img[0]) // no cart name set
strcpy(buffer, "* no cartridge *");
else
nice_name(buffer, config.cart_img);
return buffer;
}
char tos_disk_is_inserted(char index) {
if (index <= 1)
return (fdd_image[index].file.size != 0);
return hdd_image[index - 2].size != 0;
}
void tos_select_hdd_image(char i, const char *name)
{
tos_debugf("Select ACSI%c image %s", '0' + i, name);
if(name) strcpy(config.acsi_img[i], name);
else config.acsi_img[i][0] = 0;
if (!name)
{
FileClose(&hdd_image[i]);
hdd_image[i].size = 0;
config.system_ctrl &= ~(TOS_ACSI0_ENABLE << i);
}
else
{
if (FileOpen(&hdd_image[i], name))
{
config.system_ctrl |= (TOS_ACSI0_ENABLE << i);
}
}
// update system control
mist_set_control(config.system_ctrl);
}
void tos_insert_disk(char i, const char *name)
{
if (i > 1)
{
tos_select_hdd_image(i - 2, name);
return;
}
tos_debugf("%c: eject", i + 'A');
// toggle write protect bit to help tos detect a media change
int wp_bit = (!i) ? TOS_CONTROL_FDC_WR_PROT_A : TOS_CONTROL_FDC_WR_PROT_B;
// any disk ejected is "write protected" (as nothing covers the write protect mechanism)
mist_set_control(config.system_ctrl | wp_bit);
// first "eject" disk
fdd_image[i].file.size = 0;
fdd_image[i].sides = 1;
fdd_image[i].spt = 0;
FileClose(&fdd_image[i].file);
// no new disk given?
if (!name) return;
// open floppy
if (!FileOpen(&fdd_image[i].file, name)) return;
tos_debugf("%c: insert %s", i + 'A', name);
// check image size and parameters
// check if image size suggests it's a two sided disk
if (fdd_image[i].file.size > 85 * 11 * 512)
fdd_image[i].sides = 2;
// try common sector/track values
int m, s, t;
for (m = 0; m <= 2; m++) // multiplier for hd/ed disks
for (s = 9; s <= 12; s++)
for (t = 78; t <= 85; t++)
if (512 * (1 << m)*s*t*fdd_image[i].sides == fdd_image[i].file.size)
fdd_image[i].spt = s*(1 << m);
if (!fdd_image[i].spt) {
// read first sector from disk
/*
if (MMC_Read(0, dma_buffer)) {
fdd_image[i].spt = dma_buffer[24] + 256 * dma_buffer[25];
fdd_image[i].sides = dma_buffer[26] + 256 * dma_buffer[27];
}
else
*/
fdd_image[i].file.size = 0;
}
if (fdd_image[i].file.size) {
// restore state of write protect bit
tos_update_sysctrl(config.system_ctrl);
tos_debugf("%c: detected %d sides with %d sectors per track",
i + 'A', fdd_image[i].sides, fdd_image[i].spt);
}
}
// force ejection of all disks (SD card has been removed)
void tos_eject_all() {
int i;
for (i = 0; i<2; i++)
tos_insert_disk(i, NULL);
// ejecting an SD card while a hdd image is mounted may be a bad idea
for (i = 0; i<2; i++) {
if (hdd_direct)
hdd_direct = 0;
if (hdd_image[i].size) {
InfoMessage("Card removed:\nDisabling Harddisk!");
hdd_image[i].size = 0;
}
}
}
void tos_reset(char cold) {
ikbd_reset();
tos_update_sysctrl(config.system_ctrl | TOS_CONTROL_CPU_RESET); // set reset
if (cold) {
#if 0 // clearing mem should be sifficient. But currently we upload TOS as it may be damaged
// clear first 16k
mist_memory_set_address(8);
mist_memory_set(0x00, 8192 - 4);
#else
tos_upload(NULL);
#endif
}
tos_update_sysctrl(config.system_ctrl & ~TOS_CONTROL_CPU_RESET); // release reset
}
unsigned long tos_system_ctrl(void)
{
return config.system_ctrl;
}
void tos_config_init(void)
{
// set default values
config.system_ctrl = TOS_MEMCONFIG_4M | TOS_CONTROL_BLITTER;
strcpy(config.tos_img, "TOS.IMG");
config.cart_img[0] = 0;
strcpy(config.acsi_img[0], "HARDDISK.HD");
config.acsi_img[1][0] = 0;
config.video_adjust[0] = config.video_adjust[1] = 0;
// try to load config
int size = FileLoadConfig(CONFIG_FILENAME, 0, 0);
if (size>0)
{
tos_debugf("Configuration file size: %lu (should be %lu)", size, sizeof(tos_config_t));
if (size == sizeof(tos_config_t))
{
FileLoadConfig(CONFIG_FILENAME, &config, size);
}
}
// ethernet is auto detected later
config.system_ctrl &= ~TOS_CONTROL_ETHERNET;
}
// save configuration
void tos_config_save(void)
{
FileSaveConfig(CONFIG_FILENAME, &config, sizeof(tos_config_t));
}
Reference in New Issue View Git Blame Copy Permalink