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(mess) upd765: Implement LOCK [O. Galibert]

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This commit is contained in:
Olivier Galibert 2012-10-11 21:51:32 +00:00
parent f5a8f929ff
commit 380e2da737
2 changed files with 25 additions and 9 deletions
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28
src/mess/machine/upd765.c
View File

@ -132,9 +132,16 @@ void upd765_family_device::device_start()
poll_timer = NULL;
cur_irq = false;
locked = false;
}
void upd765_family_device::device_reset()
{
dor = dor_reset;
locked = false;
}
void upd765_family_device::soft_reset()
{
main_phase = PHASE_CMD;
for(int i=0; i<4; i++) {
@ -150,6 +157,7 @@ void upd765_family_device::device_reset()
fifo_pos = 0;
command_pos = 0;
result_pos = 0;
if(!locked)
fifocfg = FIF_DIS;
cur_live.fi = 0;
drq = false;
@ -159,7 +167,6 @@ void upd765_family_device::device_reset()
cur_live.fi = NULL;
tc_done = false;
st0 = st1 = st2 = st3 = 0x00;
dor = dor_reset;
check_irq();
if(ready_polled)
@ -240,12 +247,8 @@ WRITE8_MEMBER(upd765_family_device::dor_w)
logerror("%s: dor = %02x\n", tag(), data);
UINT8 diff = dor ^ data;
dor = data;
if(diff & 4) {
UINT8 tmp = dor_reset;
dor_reset = dor;
device_reset();
dor_reset = tmp;
}
if(diff & 4)
soft_reset();
for(int i=0; i<4; i++) {
floppy_info &fi = flopi[i];
@ -972,6 +975,9 @@ int upd765_family_device::check_command()
case 0x13:
return command_pos == 4 ? C_CONFIGURE : C_INCOMPLETE;
case 0x14:
return C_LOCK;
default:
return C_INVALID;
}
@ -997,6 +1003,14 @@ void upd765_family_device::start_command(int cmd)
format_track_start(flopi[command[1] & 3]);
break;
case C_LOCK:
locked = command[0] & 0x80;
main_phase = PHASE_RESULT;
result[0] = locked ? 0x10 : 0x00;
result_pos = 1;
logerror("%s: command lock (%s)\n", tag(), locked ? "on" : "off");
break;
case C_PERPENDICULAR:
logerror("%s: command perpendicular\n", tag());
main_phase = PHASE_CMD;

4
src/mess/machine/upd765.h
View File

@ -284,7 +284,7 @@ protected:
live_info cur_live, checkpoint_live;
line_cb intrq_cb, drq_cb;
bool cur_irq, data_irq, drq, internal_drq, tc, tc_done;
bool cur_irq, data_irq, drq, internal_drq, tc, tc_done, locked;
floppy_info flopi[4];
int fifo_pos, fifo_expected, command_pos, result_pos;
@ -304,6 +304,7 @@ protected:
enum {
C_CONFIGURE,
C_FORMAT_TRACK,
C_LOCK,
C_PERPENDICULAR,
C_READ_DATA,
C_READ_ID,
@ -321,6 +322,7 @@ protected:
void delay_cycles(emu_timer *tm, int cycles);
void check_irq();
void soft_reset();
void fifo_expect(int size, bool write);
void fifo_push(UINT8 data, bool internal);
UINT8 fifo_pop(bool internal);