int drive_check_type(unsigned int drive_type, unsigned int dnr)
{
if (!drive_check_bus(drive_type, iec_available_busses()))
return 0;
if (drive_check_dual(drive_type)) {
if (is_drive1(dnr)) {
/* Dual drives only supported on even device numbers. */
return 0;
} else {
if (drive_context[mk_drive1(dnr)]->drive->type != DRIVE_TYPE_NONE)
/* Disable dual drive if second device is enabled. */
return 0;
}
} else {
if (is_drive1(dnr)) {
if (drive_check_dual(drive_context[mk_drive0(dnr)]->drive->type))
/* Disable second device if dual drive is enabled. */
return drive_type == DRIVE_TYPE_NONE;
}
}
if (machine_drive_rom_check_loaded(drive_type) < 0)
return 0;
return 1;
}
void fdc_reset(unsigned int fnum, unsigned int drive_type)
{
fdc_t *thefdc = &fdc[fnum];
int drive1 = mk_drive1(fnum);
disk_image_t *saved_image0,
*saved_image1;
#ifdef FDC_DEBUG
log_message(fdc_log, "fdc_reset: drive %d type=%d\n",fnum, drive_type);
#endif
saved_image0 = fdc[fnum].realimage;
saved_image1 = NULL;
/* detach disk images */
if (thefdc->image) {
thefdc->wps_change = 0;
fdc_detach_image(thefdc->image, fnum + 8);
}
if (thefdc->num_drives == 2) {
saved_image1 = fdc[drive1].realimage;
if (fdc[drive1].image) {
fdc[drive1].wps_change = 0;
fdc_detach_image(fdc[drive1].image, drive1 + 8);
}
}
if (drive_check_old(drive_type)) {
thefdc->drive_type = drive_type;
thefdc->num_drives = is_drive1(fnum) ? 1 :
drive_check_dual(drive_type) ? 2 : 1;
thefdc->fdc_state = FDC_RESET0;
alarm_set(thefdc->fdc_alarm, drive_clk[fnum] + 20);
} else {
thefdc->drive_type = DRIVE_TYPE_NONE;
alarm_unset(thefdc->fdc_alarm);
thefdc->fdc_state = FDC_UNUSED;
thefdc->num_drives = 0;
}
/* re-attach disk images */
if (saved_image0) {
#ifdef FDC_DEBUG
printf("ieee/fdc.c:fdc_reset dev %d type %d drive 0 re-attach image %p (drive: %p)\n", fnum+8, drive_type, saved_image0, drive_context[fnum]->drive->image);
#endif
fdc_attach_image(saved_image0, fnum + 8);
}
if (saved_image1) {
#ifdef FDC_DEBUG
printf("ieee/fdc.c:fdc_reset dev %d type %d drive 1 re-attach image %p (drive: %p)\n", fnum+8, drive_type, saved_image0, drive_context[drive1]->drive->image);
#endif
fdc_attach_image(saved_image1, drive1 + 8);
}
}
