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FDC changes :

Browse source 
- Seperated disk and disk drive emulation
- Support more drive types - 5.25" dual RPM, 3.5" DD, 3.5" HD, 3.5" HD 3-Mode
- Support drive swapping (FDC37c665 only)
- Support FDC FIFO
- Support other FDC 'enhanced mode' behaviour
- Support IBM XDF format images
- Formatting now formats both tracks, and uses correct 'fill' byte
- Various other improvements

Many of these changes provided by Battler
This commit is contained in:
TomW 2015-12-12 16:31:08 +00:00
commit eebdc165b2
16 changed files with 1530 additions and 340 deletions
Download patch file Download diff file Expand all files Collapse all files

93
src/disc.c
View file

@ -5,6 +5,7 @@
#include "disc_fdi.h"
#include "disc_img.h"
#include "fdc.h"
#include "fdd.h"
#include "timer.h"
int disc_drivesel = 0;
@ -57,6 +58,8 @@ loaders[]=
{
{"IMG", img_load, img_close, -1},
{"IMA", img_load, img_close, -1},
{"360", img_load, img_close, -1},
{"XDF", img_load, img_close, -1},
{"FDI", fdi_load, fdi_close, -1},
{0,0,0}
};
@ -105,6 +108,7 @@ void disc_close(int drive)
if (loaders[driveloaders[drive]].close) loaders[driveloaders[drive]].close(drive);
drive_empty[drive] = 1;
discfns[drive][0] = 0;
drives[drive].hole = NULL;
drives[drive].poll = NULL;
drives[drive].seek = NULL;
drives[drive].readsector = NULL;
@ -116,6 +120,20 @@ void disc_close(int drive)
int disc_notfound=0;
static int disc_period = 32;
int disc_hole(int drive)
{
drive ^= fdd_swap;
if (drives[drive].hole)
{
return drives[drive].hole(drive);
}
else
{
return 0;
}
}
void disc_poll()
{
disc_poll_time += disc_period * TIMER_USEC;
@ -131,14 +149,50 @@ void disc_poll()
}
}
void disc_set_rate(int rate)
int disc_get_bitcell_period(int rate)
{
int bit_rate;
switch (rate)
{
case 0: /*High density*/
bit_rate = 500;
break;
case 1: /*Double density (360 rpm)*/
bit_rate = 300;
break;
case 2: /*Double density*/
bit_rate = 250;
break;
case 3: /*Extended density*/
bit_rate = 1000;
break;
}
return 1000000 / bit_rate*2; /*Bitcell period in ns*/
}
void disc_set_rate(int drive, int drvden, int rate)
{
switch (rate)
{
case 0: /*High density*/
case 1: /*High density (360 rpm)*/
disc_period = 16;
break;
case 1:
switch(drvden)
{
case 0: /*Double density (360 rpm)*/
disc_period = 26;
break;
case 1: /*High density (360 rpm)*/
disc_period = 16;
break;
case 2:
disc_period = 4;
break;
}
case 2: /*Double density*/
disc_period = 32;
break;
@ -167,47 +221,64 @@ void disc_init()
int oldtrack[2] = {0, 0};
void disc_seek(int drive, int track)
{
// pclog("disc_seek: drive=%i track=%i\n", drive, track);
if (drives[drive].seek)
drives[drive].seek(drive, track);
// if (track != oldtrack[drive])
fdc_discchange_clear(drive);
// fdc_discchange_clear(drive);
// ddnoise_seek(track - oldtrack[drive]);
oldtrack[drive] = track;
disctime = 5000;
// oldtrack[drive] = track;
}
void disc_readsector(int drive, int sector, int track, int side, int density)
void disc_readsector(int drive, int sector, int track, int side, int density, int sector_size)
{
drive ^= fdd_swap;
if (drives[drive].readsector)
drives[drive].readsector(drive, sector, track, side, density);
drives[drive].readsector(drive, sector, track, side, density, sector_size);
else
disc_notfound = 1000;
}
void disc_writesector(int drive, int sector, int track, int side, int density)
void disc_writesector(int drive, int sector, int track, int side, int density, int sector_size)
{
drive ^= fdd_swap;
if (drives[drive].writesector)
drives[drive].writesector(drive, sector, track, side, density);
drives[drive].writesector(drive, sector, track, side, density, sector_size);
else
disc_notfound = 1000;
}
void disc_readaddress(int drive, int track, int side, int density)
{
drive ^= fdd_swap;
if (drives[drive].readaddress)
drives[drive].readaddress(drive, track, side, density);
}
void disc_format(int drive, int track, int side, int density)
void disc_format(int drive, int track, int side, int density, uint8_t fill)
{
drive ^= fdd_swap;
if (drives[drive].format)
drives[drive].format(drive, track, side, density);
drives[drive].format(drive, track, side, density, fill);
else
disc_notfound = 1000;
}
void disc_stop(int drive)
{
drive ^= fdd_swap;
if (drives[drive].stop)
drives[drive].stop(drive);
}
void disc_set_drivesel(int drive)
{
drive ^= fdd_swap;
disc_drivesel = drive;
}