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c00453d2eccbb0bd6b4e27a92eddf010ecd5d1ae
mist-devel.mist-firmware/tos.c
harbaum e9bbd0c337 Viking/STEroids/USBstorage
2014-05-15 12:27:42 +00:00

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#include "stdio.h"
#include "string.h"
#include "hardware.h"
#include "menu.h"
#include "tos.h"
#include "fat.h"
#include "fpga.h"
#include "cdc_control.h"
#include "debug.h"
#define CONFIG_FILENAME "MIST CFG"
typedef struct {
unsigned long system_ctrl; // system control word
char tos_img[12];
char cart_img[12];
char acsi_img[2][12];
char video_adjust[2];
char cdc_control_redirect;
} 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];
// one harddisk
fileTYPE hdd_image[2];
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"
};
return cmdname[cmd];
}
char tos_get_cdc_control_redirect(void) {
return config.cdc_control_redirect;
}
void tos_set_cdc_control_redirect(char mode) {
if((mode >= CDC_REDIRECT_NONE) && (mode <= CDC_REDIRECT_MIDI)) {
config.cdc_control_redirect = mode;
// core is only informed about redirections of rs232/par/midi
if(mode < CDC_REDIRECT_RS232)
mode = 0;
else
mode -= CDC_REDIRECT_RS232 - 1;
tos_update_sysctrl((tos_system_ctrl() & ~0x0c000000) |
(((unsigned long)mode) << 26) );
}
}
void tos_set_video_adjust(char axis, char value) {
config.video_adjust[axis] += value;
EnableFpga();
SPI(MIST_SET_VADJ);
SPI(config.video_adjust[0]);
SPI(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) {
a >>= 1; // make word address
EnableFpga();
SPI(MIST_SET_ADDRESS);
SPI((a >> 24) & 0xff);
SPI((a >> 16) & 0xff);
SPI((a >> 8) & 0xff);
SPI((a >> 0) & 0xff);
DisableFpga();
}
static void mist_set_control(unsigned long ctrl) {
EnableFpga();
SPI(MIST_SET_CONTROL);
SPI((ctrl >> 24) & 0xff);
SPI((ctrl >> 16) & 0xff);
SPI((ctrl >> 8) & 0xff);
SPI((ctrl >> 0) & 0xff);
DisableFpga();
}
static void mist_bus_request(char req) {
EnableFpga();
SPI(req?MIST_BUS_REQ:MIST_BUS_REL);
DisableFpga();
}
static void mist_memory_read(char *data, unsigned long words) {
mist_bus_request(1);
EnableFpga();
SPI(MIST_READ_MEMORY);
// transmitted bytes must be multiple of 2 (-> words)
while(words--) {
*data++ = SPI(0);
*data++ = SPI(0);
}
DisableFpga();
mist_bus_request(0);
}
static void mist_memory_write(char *data, unsigned long words) {
mist_bus_request(1);
EnableFpga();
SPI(MIST_WRITE_MEMORY);
while(words--) {
SPI_WRITE(*data++);
SPI_WRITE(*data++);
}
DisableFpga();
mist_bus_request(0);
}
static void mist_memory_read_block(char *data) {
mist_bus_request(1);
EnableFpga();
SPI(MIST_READ_MEMORY);
SPI_block_read(data);
DisableFpga();
mist_bus_request(0);
}
static void mist_memory_write_block(char *data) {
mist_bus_request(1);
EnableFpga();
SPI(MIST_WRITE_MEMORY);
SPI_block_write(data);
DisableFpga();
mist_bus_request(0);
}
void mist_memory_set(char data, unsigned long words) {
mist_bus_request(1);
EnableFpga();
SPI(MIST_WRITE_MEMORY);
while(words--) {
SPI_WRITE(data);
SPI_WRITE(data);
}
DisableFpga();
mist_bus_request(0);
}
static void handle_acsi(unsigned char *buffer) {
unsigned char target = buffer[9] >> 5;
unsigned char cmd = buffer[9] & 0x1f;
unsigned int dma_address = 256 * 256 * buffer[0] +
256 * buffer[1] + buffer[2];
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;
tos_debugf("ACSI: target %d, \"%s\"", target, acsi_cmd_name(cmd));
tos_debugf("ACSI: lba %lu, length %u", lba, length);
tos_debugf("DMA: scnt %u, addr %p", scnt, dma_address);
// only a harddisk on ACSI 0 is supported
// ACSI 0 is only supported if a image is loaded
if((target < 2) && (hdd_image[target].size != 0)) {
mist_memory_set_address(dma_address);
switch(cmd) {
case 0x08: // read sector
DISKLED_ON;
while(length) {
FileSeek(&hdd_image[target], lba++, SEEK_SET);
FileRead(&hdd_image[target], dma_buffer);
mist_memory_write(dma_buffer, 256);
length--;
}
DISKLED_OFF;
break;
case 0x0a: // write sector
DISKLED_ON;
while(length) {
mist_memory_read(dma_buffer, 256);
FileSeek(&hdd_image[target], lba++, SEEK_SET);
FileWrite(&hdd_image[target], dma_buffer);
length--;
}
DISKLED_OFF;
break;
case 0x12: // inquiry
tos_debugf("ACSI: Inquiry %11s", hdd_image[target].name);
bzero(dma_buffer, 512);
dma_buffer[2] = 1; // ANSI version
dma_buffer[4] = length-8; // len
memcpy(dma_buffer+8, "MIST ", 8); // Vendor
memcpy(dma_buffer+16, " ", 16); // Clear device entry
memcpy(dma_buffer+16, hdd_image[target].name, 11); // Device
mist_memory_write(dma_buffer, length/2);
break;
case 0x1a: // mode sense
{ unsigned int blocks = hdd_image[target].size / 512;
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);
}
break;
default:
tos_debugf("ACSI: Unsupported command");
break;
}
} else
tos_debugf("ACSI: Request for unsupported target");
EnableFpga();
SPI(MIST_ACK_DMA);
DisableFpga();
}
static void handle_fdc(unsigned char *buffer) {
// extract contents
unsigned int dma_address = 256 * 256 * buffer[0] +
256 * buffer[1] + buffer[2];
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);
// iprintf("FDC: sel %d, cmd %d\n", 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;
while(scnt) {
// iprintf(" sector %d\n", offset);
DISKLED_ON;
FileSeek(&fdd_image[drv_sel-1].file, offset, SEEK_SET);
mist_memory_set_address(dma_address);
if((fdc_cmd & 0xe0) == 0x80) {
// read from disk ...
FileRead(&fdd_image[drv_sel-1].file, dma_buffer);
// ... and copy to ram
mist_memory_write(dma_buffer, 256);
} else {
// read from ram ...
mist_memory_read(dma_buffer, 256);
// ... and write to disk
FileWrite(&(fdd_image[drv_sel-1].file), dma_buffer);
}
DISKLED_OFF;
scnt--;
dma_address += 512;
offset += 1;
}
EnableFpga();
SPI(MIST_ACK_DMA);
DisableFpga();
// iprintf("done\n");
} else if((fdc_cmd & 0xc0) == 0xc0) {
char msg[32];
if((fdc_cmd & 0xe0) == 0xc0) iprintf("READ ADDRESS\n");
if((fdc_cmd & 0xf0) == 0xe0) {
iprintf("READ TRACK %d SIDE %d\n", fdc_track, drv_side);
siprintf(msg, "RD TRK %d S %d", fdc_track, drv_side);
InfoMessage(msg);
}
if((fdc_cmd & 0xf0) == 0xf0) {
iprintf("WRITE TRACK %d SIDE %d\n", fdc_track, drv_side);
siprintf(msg, "WR TRK %d S %d", fdc_track, drv_side);
InfoMessage(msg);
}
iprintf("scnt = %d\n", scnt);
EnableFpga();
SPI(MIST_ACK_DMA);
DisableFpga();
}
}
}
static void mist_get_dmastate() {
static unsigned char buffer[16];
int i;
EnableFpga();
SPI(MIST_GET_DMASTATE);
for(i=0;i<16;i++)
buffer[i] = SPI(0);
DisableFpga();
// check if acsi is busy
if(buffer[8] & 0x10)
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(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);
mist_memory_write((char*)buffer, COLORS*PLANES);
}
}
#if 1
mist_memory_set_address(VIDEO_BASE_ADDRESS);
mist_memory_set(0xf0, 40);
mist_memory_set_address(VIDEO_BASE_ADDRESS+80);
mist_memory_set(0x55, 40);
mist_memory_set_address(VIDEO_BASE_ADDRESS+160);
mist_memory_set(0x0f, 40);
#if 1
tos_write("");
tos_write("AAAAAAAABBBBBBBBCCCCCCCCDDDDDDDDEEEEEEEEFFFFFFFFGGGGGGGGHHHHHHHHIIIIIIIIJJJJJJJJ");
tos_write("ABCDEFGHIJHKLMNOPQRSTUVWXYZ0123456789ABCDEFGHIJHKLMNOPQRSTUVWXYZ0123456789");
#endif
// for(;;);
#endif
}
static void tos_write(char *str) {
static int y = 0;
int l;
if(!str) {
y = 0;
return;
}
int c = strlen(str);
{
char buffer[c];
// 16 pixel lines
for(l=0;l<16;l++) {
char *p = str, *f=buffer;
while(*p)
*f++ = font[16 * *p++ + l];
mist_memory_set_address(VIDEO_BASE_ADDRESS + 80*(y+l));
mist_memory_write(buffer, c/2);
}
}
y+=16;
}
static void tos_clr() {
mist_memory_set_address(VIDEO_BASE_ADDRESS);
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;
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(char *name) {
fileTYPE file;
if(name)
strncpy(config.cart_img, name, 11);
// upload cartridge
if(config.cart_img[0] && FileOpen(&file, config.cart_img)) {
int i;
char buffer[512];
tos_debugf("%s:\n size = %d", config.cart_img, file.size);
int blocks = file.size / 512;
tos_debugf(" blocks = %d", blocks);
mist_memory_set_address(CART_BASE_ADDRESS);
DISKLED_ON;
for(i=0;i<blocks;i++) {
FileRead(&file, buffer);
mist_memory_write(buffer, 256);
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);
mist_memory_set(0, 128*1024/2);
}
char tos_cartridge_is_inserted() {
return config.cart_img[0];
}
void tos_upload(char *name) {
fileTYPE file;
// 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;
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);
mist_memory_set(0x00, 8192);
#if 0 // spi transfer tests
iprintf("SPI transfer test\n");
// draw some max power pattern on screen
mist_memory_set_address(VIDEO_BASE_ADDRESS);
mist_memory_set(0x55, 16000);
FileRead(&file, buffer);
int run_ok = 0, run_fail = 0;
while(1) {
int j;
char b2[512];
for(j=0;j<512;j++) {
buffer[j] ^= 0x55;
b2[j] = 0xa5;
}
mist_memory_set_address(0);
mist_memory_set(0xaa, 256);
mist_memory_set_address(0);
// mist_memory_write_block(buffer);
mist_memory_write(buffer, 256);
mist_memory_set_address(0);
// mist_memory_read_block(b2);
mist_memory_read(b2, 256);
char ok = 1;
for(j=0;j<512;j++)
if(buffer[j] != b2[j])
ok = 0;
if(ok) run_ok++;
else run_fail++;
if(!ok) {
hexdump(buffer, 512, 0);
hexdump(b2, 512, 0);
// re-read to check whether reading fails
mist_memory_set_address(0);
mist_memory_read(b2, 256);
hexdump(b2, 512, 0);
for(;;);
}
if(!((run_ok + run_fail)%10))
iprintf("ok %d, failed %d\r", run_ok, run_fail);
}
#endif
#if 0
tos_debugf("Erasing: ");
// clear memory to increase chances of catching write problems
mist_memory_set_address(tos_base);
mist_memory_set(0x00, file.size/2);
tos_debugf("done\n");
#endif
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);
// write first 4 words
mist_memory_write(buffer, 4);
// set real tos base address
mist_memory_set_address(tos_base);
}
mist_memory_write(buffer, 256);
if(i != blocks-1)
FileNextSector(&file);
}
#if 1
// verify
if(user_io_dip_switch1()) {
char b2[512];
int j, ok;
FileSeek(&file, 0, SEEK_SET);
mist_memory_set_address(tos_base);
for(i=0;i<blocks;i++) {
FileRead(&file, b2);
mist_memory_read(buffer, 256);
// toggle reset for trigger
// config.system_ctrl &= ~TOS_CONTROL_CPU_RESET;
// mist_set_control(config.system_ctrl & ~TOS_CONTROL_CPU_RESET);
// mist_set_control(config.system_ctrl | TOS_CONTROL_CPU_RESET);
ok = -1;
for(j=0;j<512;j++)
if(buffer[j] != b2[j])
if(ok < 0)
ok = j;
if(ok >= 0) {
iprintf("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);
mist_memory_read(buffer, 256);
ok = -1;
for(j=0;j<512;j++)
if(buffer[j] != b2[j])
if(ok < 0)
ok = j;
if(ok >= 0) {
iprintf("Re-read failed in block %d/%x (%x != %x)\n", i, ok, 0xff & buffer[ok], 0xff & b2[ok]);
hexdump(buffer, 512, 0);
} else
iprintf("Re-read ok!\n");
for(;;);
}
if(i != blocks-1)
FileNextSector(&file);
}
iprintf("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;
fileTYPE file;
if(FileOpen(&file, name)) {
tos_write(msg);
tos_insert_disk(i, &file);
}
}
// try to open harddisk image
for(i=0;i<2;i++) {
if(FileOpen(&file, config.acsi_img[i])) {
char msg[] = "Found hard disk image for ACSIX";
msg[30] = '0'+i;
tos_write(msg);
tos_select_hdd_image(i, &file);
}
}
}
tos_write("Booting ... ");
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) {
// iprintf(">>>>>>>>>>>> set sys %x, eth is %s\n", n, (n&TOS_CONTROL_ETHERNET)?"on":"off");
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, fileTYPE *file) {
tos_debugf("Select ACSI%c image %11s", '0'+i, file->name);
if(file) memcpy(config.acsi_img[i], file->name, 12);
else config.acsi_img[i][0] = 0;
// try to open harddisk image
hdd_image[i].size = 0;
config.system_ctrl &= ~(TOS_ACSI0_ENABLE<<i);
if(file) {
config.system_ctrl |= (TOS_ACSI0_ENABLE<<i);
hdd_image[i] = *file;
}
// update system control
mist_set_control(config.system_ctrl);
}
void tos_insert_disk(char i, fileTYPE *file) {
if(i > 1) {
tos_select_hdd_image(i-2, file);
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;
// no new disk given?
if(!file) return;
// open floppy
fdd_image[i].file = *file;
tos_debugf("%c: insert %.11s", i+'A', fdd_image[i].file.name);
// check image size and parameters
// check if image size suggests it's a two sided disk
if(fdd_image[i].file.size > 80*9*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=80;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_image[i].size) {
InfoMessage("Card removed: Disabling 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) {
fileTYPE file;
// set default values
config.system_ctrl = TOS_MEMCONFIG_4M | TOS_CONTROL_BLITTER;
memcpy(config.tos_img, "TOS IMG", 12);
config.cart_img[0] = 0;
memcpy(config.acsi_img[0], "HARDDISKHD ", 12);
config.acsi_img[1][0] = 0;
config.video_adjust[0] = config.video_adjust[1] = 0;
config.cdc_control_redirect = CDC_REDIRECT_NONE;
// try to load config
if (FileOpen(&file, CONFIG_FILENAME)) {
tos_debugf("Configuration file size: %lu (should be %lu)", file.size, sizeof(tos_config_t));
if(file.size == sizeof(tos_config_t)) {
FileRead(&file, sector_buffer);
memcpy(&config, sector_buffer, sizeof(tos_config_t));
}
}
// ethernet is auto detected later
config.system_ctrl &= ~TOS_CONTROL_ETHERNET;
}
// save configuration
void tos_config_save(void) {
fileTYPE file;
// save configuration data
if (FileOpen(&file, CONFIG_FILENAME)) {
tos_debugf("Existing conf file size: %lu", file.size);
if(file.size != sizeof(tos_config_t)) {
file.size = sizeof(tos_config_t);
if (!UpdateEntry(&file))
return;
}
} else {
tos_debugf("Creating new config");
strncpy(file.name, CONFIG_FILENAME, 11);
file.attributes = 0;
file.size = sizeof(tos_config_t);
if(!FileCreate(0, &file)) {
tos_debugf("File creation failed.");
return;
}
}
// finally write the config
memcpy(sector_buffer, &config, sizeof(tos_config_t));
FileWrite(&file, sector_buffer);
}
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