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upd765: revert data_completion change and clear data_irq in fifo_r/w. Also disable clearing data_irq in msr_r.

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This commit is contained in:
cracyc 2022-12-05 21:22:49 -06:00
parent 69916dcec0
commit 760e392bdd
1 changed files with 8 additions and 13 deletions
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21
src/devices/machine/upd765.cpp
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@ -521,11 +521,6 @@ uint8_t upd765_family_device::msr_r()
}
msr |= get_drive_busy();
if(data_irq && !machine().side_effects_disabled()) {
data_irq = false;
check_irq();
}
return msr;
}
@ -546,6 +541,8 @@ void upd765_family_device::set_rate(int rate)
uint8_t upd765_family_device::fifo_r()
{
uint8_t r = 0xff;
if(!machine().side_effects_disabled())
data_irq = false;
switch(main_phase) {
case PHASE_CMD:
if(machine().side_effects_disabled())
@ -591,6 +588,7 @@ void upd765_family_device::fifo_w(uint8_t data)
if(!BIT(dor, 2))
LOGWARN("%s: fifo_w(%02x) in reset\n", machine().describe_context(), data);
data_irq = false;
switch(main_phase) {
case PHASE_CMD: {
command[command_pos++] = data;
@ -1982,10 +1980,7 @@ void upd765_family_device::read_data_continue(floppy_info &fi)
result[5] = command[4];
result[6] = command[5];
result_pos = 7;
// PC80S31K i/f is fussy on this:
// wants data_completion = false for anything that throws a scan_id failed,
// otherwise it will try to terminal count something that doesn't have data in the first place.
command_end(fi, (fi.st0 & 0xc0) == 0x00);
command_end(fi, true);
return;
default:
@ -2136,7 +2131,7 @@ void upd765_family_device::write_data_continue(floppy_info &fi)
result[5] = command[4];
result[6] = command[5];
result_pos = 7;
command_end(fi, (fi.st0 & 0xc0) == 0x00);
command_end(fi, true);
return;
default:
@ -2322,7 +2317,7 @@ void upd765_family_device::read_track_continue(floppy_info &fi)
result[5] = command[4];
result[6] = command[5];
result_pos = 7;
command_end(fi, (fi.st0 & 0xc0) == 0x00);
command_end(fi, true);
return;
default:
@ -2412,7 +2407,7 @@ void upd765_family_device::format_track_continue(floppy_info &fi)
result[5] = 0;
result[6] = command[2];
result_pos = 7;
command_end(fi, (fi.st0 & 0xc0) == 0x00);
command_end(fi, true);
return;
default:
@ -2504,7 +2499,7 @@ void upd765_family_device::read_id_continue(floppy_info &fi)
result[5] = cur_live.idbuf[2];
result[6] = cur_live.idbuf[3];
result_pos = 7;
command_end(fi, (fi.st0 & 0xc0) == 0x00);
command_end(fi, true);
return;
default: