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(MESS) Fixed upd765 SIS status when fid = 4, this makes NEC PC-88VA to attempt to DMA from floppy. [Angelo Salese]

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This commit is contained in:
Angelo Salese 2012-11-22 17:48:26 +00:00
parent 6034c3ecc8
commit 20f0cd1a58
3 changed files with 48 additions and 15 deletions
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2
src/mess/drivers/apc.c
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@ -735,9 +735,7 @@ INPUT_PORTS_END
void apc_state::fdc_drq(bool state)
{
// printf("%02x DRQ\n",state);
// i8237_dreq0_w(m_dma, state);
m_dmac->dreq1_w(state);
}
void apc_state::fdc_irq(bool state)

55
src/mess/drivers/pc88va.c
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@ -15,8 +15,9 @@
- What is exactly supposed to be a "bus slot"?
- fdc "intelligent mode" has 0x7f as irq vector ... 0x7f is ld a,a and it IS NOT correctly
hooked up by the current z80 core
- PC-88VA has two bogus opcodes. One is at 0xf0b15, another at 0xf0b31. Making a patch
for the latter makes the system to jump into a "DIP-Switch" display.
- PC-88VA stock version has two bogus opcodes. One is at 0xf0b15, another at 0xf0b31.
Making a patch for the latter makes the system to jump into a "DIP-Switch" display.
- unemulated upd71071 demand mode.
********************************************************************************************/
@ -59,9 +60,11 @@ class pc88va_state : public driver_device
public:
pc88va_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag) ,
m_fdc(*this, "upd765"),
m_dmac(*this, "dmac"),
m_palram(*this, "palram"){ }
required_device<upd765a_device> m_fdc;
required_device<upd71071_device> m_dmac;
required_shared_ptr<UINT16> m_palram;
UINT16 m_bank_reg;
@ -132,11 +135,14 @@ public:
DECLARE_WRITE_LINE_MEMBER(pc88va_pic_irq);
DECLARE_READ8_MEMBER(get_slave_ack);
DECLARE_WRITE_LINE_MEMBER(pc88va_pit_out0_changed);
DECLARE_WRITE_LINE_MEMBER(pc88va_upd765_interrupt);
// DECLARE_WRITE_LINE_MEMBER(pc88va_upd765_interrupt);
UINT8 m_fdc_ctrl_2;
TIMER_CALLBACK_MEMBER(pc88va_fdc_timer);
// UINT16 m_fdc_dma_r(running_machine &machine);
// void m_fdc_dma_w(running_machine &machine, UINT16 data);
void upd765_interrupt(bool state);
void fdc_irq(bool state);
void fdc_drq(bool state);
};
@ -1024,6 +1030,10 @@ WRITE8_MEMBER(pc88va_state::pc88va_fdc_w)
---- --xx RV1/RV0: Drive 1/0 mode selection (0) 2D and 2DD mode (1) 2HD mode
*/
case 0x02: // FDC control port 0
machine().device<floppy_connector>("upd765:0")->get_device()->set_rpm(data & 0x01 ? 360 : 300);
machine().device<floppy_connector>("upd765:1")->get_device()->set_rpm(data & 0x02 ? 360 : 300);
machine().device<upd765a_device>("upd765")->set_rate(data & 0x20 ? 500000 : 250000);
break;
/*
---- x--- PCM: ?
@ -1039,14 +1049,17 @@ WRITE8_MEMBER(pc88va_state::pc88va_fdc_w)
*/
case 0x06:
//printf("%02x\n",data);
m_fdc_ctrl_2 = data;
if(data & 1)
machine().scheduler().timer_set(attotime::from_msec(100), timer_expired_delegate(FUNC(pc88va_state::pc88va_fdc_timer),this));
if((m_fdc_ctrl_2 & 0x10) != (data & 0x10))
upd71071_dmarq(m_dmac,1,2);
if(data & 0x80) // correct?
machine().device<upd765a_device>("upd765")->reset();
m_fdc_ctrl_2 = data;
break; // FDC control port 2
}
}
@ -1584,7 +1597,8 @@ void pc88va_state::machine_start()
m_t3_mouse_timer = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(pc88va_state::t3_mouse_callback),this));
m_t3_mouse_timer->adjust(attotime::never);
machine().device<upd765a_device>("upd765")->setup_intrq_cb(upd765a_device::line_cb(FUNC(pc88va_state::upd765_interrupt), this));
m_fdc->setup_drq_cb(upd765a_device::line_cb(FUNC(pc88va_state::fdc_drq), this));
m_fdc->setup_intrq_cb(upd765a_device::line_cb(FUNC(pc88va_state::fdc_irq), this));
machine().device<floppy_connector>("upd765:0")->get_device()->set_rpm(300);
machine().device<floppy_connector>("upd765:1")->get_device()->set_rpm(300);
@ -1659,7 +1673,13 @@ static const struct pit8253_config pc88va_pit8253_config =
};
void pc88va_state::upd765_interrupt(bool state)
void pc88va_state::fdc_drq(bool state)
{
printf("%02x DRQ\n",state);
upd71071_dmarq(m_dmac,state,2);
}
void pc88va_state::fdc_irq(bool state)
{
if(m_fdc_mode && state)
{
@ -1687,13 +1707,28 @@ static const ym2203_interface pc88va_ym2203_intf =
DEVCB_NULL
};
static UINT16 m_fdc_dma_r(running_machine &machine)
{
pc88va_state *state = machine.driver_data<pc88va_state>();
printf("R DMA\n");
return state->m_fdc->dma_r();
}
static void m_fdc_dma_w(running_machine &machine, UINT16 data)
{
pc88va_state *state = machine.driver_data<pc88va_state>();
printf("W DMA %08x\n",data);
state->m_fdc->dma_w(data);
}
/* ch2 is FDC, ch0/3 are "user". ch1 is unused */
static const upd71071_intf pc88va_dma_config =
{
"maincpu",
8000000,
{ 0, 0, 0, 0 },
{ 0, 0, 0, 0 }
{ 0, 0, m_fdc_dma_r, 0 },
{ 0, 0, m_fdc_dma_w, 0 }
};
static const floppy_format_type pc88va_floppy_formats[] = {

6
src/mess/machine/upd765.c
View File

@ -1203,9 +1203,8 @@ void upd765_family_device::start_command(int cmd)
if(fid == 4) {
st0 = ST0_UNK;
result[0] = st0;
result[1] = 0x00;
result_pos = 2;
logerror("%s: command sense interrupt status (%02x %02x)\n", tag(), result[0], result[1]);
result_pos = 1;
logerror("%s: command sense interrupt status (%02x)\n", tag(), result[0]);
break;
}
floppy_info &fi = flopi[fid];
@ -1364,6 +1363,7 @@ void upd765_family_device::read_data_start(floppy_info &fi)
fi.main_state = READ_DATA;
fi.sub_state = HEAD_LOAD_DONE;
mfm = command[0] & 0x40;
logerror("%s: command read%s data%s%s%s%s cmd=%02x sel=%x chrn=(%d, %d, %d, %d) eot=%02x gpl=%02x dtl=%02x rate=%d\n",
tag(),
command[0] & 0x08 ? " deleted" : "",