Various changes to FDC emulation.
Support for multiple disc image formats. Added preliminary FDI support.
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TomW
parent
37fe4a56be
commit
a8159f8c09
20 changed files with 3797 additions and 393 deletions
203
src/disc.c
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203
src/disc.c
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#include "ibm.h"
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#include "config.h"
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#include "disc.h"
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#include "disc_fdi.h"
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#include "disc_img.h"
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#include "fdc.h"
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#include "timer.h"
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int disc_drivesel = 0;
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int disc_poll_time = 16;
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int disc_track[2];
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int writeprot[2], fwriteprot[2];
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DRIVE drives[2];
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int curdrive = 0;
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//char discfns[2][260] = {"", ""};
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int defaultwriteprot = 0;
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int fdc_time;
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int disc_time;
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int fdc_ready;
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int drive_empty[2] = {1, 1};
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int disc_changed[2];
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int motorspin;
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int motoron;
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int fdc_indexcount = 52;
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/*void (*fdc_callback)();
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void (*fdc_data)(uint8_t dat);
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void (*fdc_spindown)();
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void (*fdc_finishread)();
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void (*fdc_notfound)();
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void (*fdc_datacrcerror)();
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void (*fdc_headercrcerror)();
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void (*fdc_writeprotect)();
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int (*fdc_getdata)(int last);
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void (*fdc_sectorid)(uint8_t track, uint8_t side, uint8_t sector, uint8_t size, uint8_t crc1, uint8_t crc2);
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void (*fdc_indexpulse)();*/
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static struct
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{
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char *ext;
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void (*load)(int drive, char *fn);
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void (*close)(int drive);
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int size;
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}
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loaders[]=
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{
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{"IMG", img_load, img_close, -1},
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{"IMA", img_load, img_close, -1},
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{"FDI", fdi_load, fdi_close, -1},
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{0,0,0}
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};
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static int driveloaders[4];
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void disc_load(int drive, char *fn)
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{
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int c = 0, size;
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char *p;
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FILE *f;
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// pclog("disc_load %i %s\n", drive, fn);
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// setejecttext(drive, "");
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if (!fn) return;
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p = get_extension(fn);
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if (!p) return;
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// setejecttext(drive, fn);
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pclog("Loading :%i %s %s\n", drive, fn,p);
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f = fopen(fn, "rb");
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if (!f) return;
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fseek(f, -1, SEEK_END);
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size = ftell(f) + 1;
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fclose(f);
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while (loaders[c].ext)
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{
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if (!strcasecmp(p, loaders[c].ext) && (size == loaders[c].size || loaders[c].size == -1))
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{
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pclog("Loading as %s\n", p);
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driveloaders[drive] = c;
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loaders[c].load(drive, fn);
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drive_empty[drive] = 0;
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disc_changed[drive] = 1;
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strcpy(discfns[drive], fn);
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return;
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}
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c++;
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}
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pclog("Couldn't load %s %s\n",fn,p);
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drive_empty[drive] = 1;
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discfns[drive][0] = 0;
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}
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void disc_close(int drive)
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{
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// pclog("disc_close %i\n", drive);
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if (loaders[driveloaders[drive]].close) loaders[driveloaders[drive]].close(drive);
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drive_empty[drive] = 1;
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discfns[drive][0] = 0;
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}
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int disc_notfound=0;
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static int disc_period = 32;
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void disc_poll()
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{
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disc_poll_time += disc_period * TIMER_USEC;
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if (drives[disc_drivesel].poll)
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drives[disc_drivesel].poll();
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if (disc_notfound)
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{
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disc_notfound--;
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if (!disc_notfound)
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fdc_notfound();
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}
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}
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void disc_set_rate(int rate)
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{
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switch (rate)
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{
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case 0: /*High density*/
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case 1: /*High density (360 rpm)*/
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disc_period = 16;
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break;
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case 2: /*Double density*/
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disc_period = 32;
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break;
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case 3: /*Extended density*/
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disc_period = 8;
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break;
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}
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}
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void disc_init()
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{
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// pclog("disc_init %p\n", drives);
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drives[0].poll = drives[1].poll = 0;
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drives[0].seek = drives[1].seek = 0;
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drives[0].readsector = drives[1].readsector = 0;
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curdrive = 0;
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disc_period = 32;
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timer_add(disc_poll, &disc_poll_time, &motoron, NULL);
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}
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int oldtrack[2] = {0, 0};
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void disc_seek(int drive, int track)
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{
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if (drives[drive].seek)
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drives[drive].seek(drive, track);
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// if (track != oldtrack[drive])
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fdc_discchange_clear(drive);
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// ddnoise_seek(track - oldtrack[drive]);
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oldtrack[drive] = track;
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disctime = 5000;
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}
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void disc_readsector(int drive, int sector, int track, int side, int density)
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{
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if (drives[drive].readsector)
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drives[drive].readsector(drive, sector, track, side, density);
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else
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disc_notfound = 1000;
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}
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void disc_writesector(int drive, int sector, int track, int side, int density)
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{
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if (drives[drive].writesector)
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drives[drive].writesector(drive, sector, track, side, density);
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else
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disc_notfound = 1000;
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}
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void disc_readaddress(int drive, int track, int side, int density)
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{
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if (drives[drive].readaddress)
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drives[drive].readaddress(drive, track, side, density);
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else
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disc_notfound = 1000;
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}
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void disc_format(int drive, int track, int side, int density)
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{
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if (drives[drive].format)
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drives[drive].format(drive, track, side, density);
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else
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disc_notfound = 1000;
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}
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void disc_stop(int drive)
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{
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if (drives[drive].stop)
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drives[drive].stop(drive);
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}
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