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IBM PS/1 Model 2121 FDC fix.

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This commit is contained in:
OBattler 2024-04-18 03:50:48 +02:00
parent 75919a1cb9
commit fed171ff4d
3 changed files with 19 additions and 2 deletions
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16
src/floppy/fdc.c
View file

@ -780,7 +780,7 @@ fdc_write(uint16_t addr, uint8_t val, void *priv)
}
return;
case 4:
if (!(fdc->flags & FDC_FLAG_PS1)) {
if (!(fdc->flags & FDC_FLAG_NO_DSR_RESET)) {
if (!(val & 0x80)) {
timer_set_delay_u64(&fdc->timer, 8 * TIMER_USEC);
fdc->interrupt = -6;
@ -2608,6 +2608,20 @@ const device_t fdc_at_ps1_device = {
.config = NULL
};
const device_t fdc_at_ps1_2121_device = {
.name = "PC/AT Floppy Drive Controller (PS/1, PS/2 ISA)",
.internal_name = "fdc_at_ps1",
.flags = 0,
.local = FDC_FLAG_NO_DSR_RESET | FDC_FLAG_DISKCHG_ACTLOW | FDC_FLAG_AT | FDC_FLAG_PS1,
.init = fdc_init,
.close = fdc_close,
.reset = fdc_reset,
{ .available = NULL },
.speed_changed = NULL,
.force_redraw = NULL,
.config = NULL
};
const device_t fdc_at_smc_device = {
.name = "PC/AT Floppy Drive Controller (SM(s)C FDC37Cxxx)",
.internal_name = "fdc_at_smc",

3
src/include/86box/fdc.h
View file

@ -55,6 +55,8 @@ extern int fdc_type;
#define FDC_FLAG_SEC 0x1000 /* Is Secondary */
#define FDC_FLAG_TER 0x2000 /* Is Tertiary */
#define FDC_FLAG_QUA 0x3000 /* Is Quaternary */
#define FDC_FLAG_CHANNEL 0x3000 /* Channel mask */
#define FDC_FLAG_NO_DSR_RESET 0x4000 /* Has no DSR reset */
typedef struct fdc_t {
uint8_t dor;
@ -251,6 +253,7 @@ extern const device_t fdc_at_ter_device;
extern const device_t fdc_at_qua_device;
extern const device_t fdc_at_actlow_device;
extern const device_t fdc_at_ps1_device;
extern const device_t fdc_at_ps1_2121_device;
extern const device_t fdc_at_smc_device;
extern const device_t fdc_at_ali_device;
extern const device_t fdc_at_winbond_device;

2
src/machine/m_ps1.c
View file

@ -378,7 +378,7 @@ ps1_setup(int model)
if (gfxcard[0] == VID_INTERNAL)
device_add(&ibm_ps1_2121_device);
device_add(&fdc_at_ps1_device);
device_add(&fdc_at_ps1_2121_device);
device_add(&ide_isa_device);