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hitachi/b16.cpp: FDC wants ready line connected

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This commit is contained in:
angelosa 2024-09-22 18:43:01 +02:00
parent bfb41f8322
commit a541421698
1 changed files with 42 additions and 17 deletions
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59
src/mame/hitachi/b16.cpp
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@ -88,7 +88,7 @@ Error codes (TODO: RE them all)
#include "emupal.h"
#include "screen.h"
#include "softlist_dev.h"
//#include "softlist_dev.h"
namespace {
@ -117,6 +117,7 @@ public:
protected:
virtual void video_start() override;
virtual void machine_start() override;
virtual void machine_reset() override;
void b16_map(address_map &map);
@ -151,6 +152,9 @@ private:
uint32_t screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
TIMER_CALLBACK_MEMBER( tc_tick_cb );
emu_timer *m_timer_tc;
static void floppy_formats(format_registration &fr);
};
@ -296,24 +300,31 @@ void b16_state::b16_io(address_map &map)
// b16ex2: jumps to $e0000 if bit 7 high, noisy on bit 4
map(0x48, 0x48).lr8(NAME([] () { return 0; }));
map(0x70, 0x73).m(m_fdc, FUNC(upd765a_device::map)).umask16(0x00ff);
// map(0x74, 0x74).rw(m_fdc, FUNC(upd765a_device::dma_r), FUNC(upd765a_device::dma_w));
map(0x74, 0x74).lw8(
NAME([this] (u8 data) {
floppy_image_device *floppy = m_floppy[0]->get_device();
// motor on strobe?
if (floppy != nullptr)
{
floppy->mon_w(1);
floppy->mon_w(0);
}
})
);
map(0x78, 0x78).lrw8(
NAME([this] () {
return m_port78;
}),
NAME([this] (u8 data) {
logerror("Port $78 %02x\n", data);
// bit 0: motor on?
// bit 0: TC strobe?
// bit 2: FDC reset?
m_port78 = data;
if (BIT(data, 0))
{
floppy_image_device *floppy = m_floppy[0]->get_device();
if (floppy != nullptr && BIT(data, 0))
{
floppy->mon_w(1);
floppy->mon_w(0);
}
m_fdc->tc_w(true);
m_timer_tc->adjust(attotime::zero);
}
})
);
@ -421,9 +432,24 @@ static void b16_floppies(device_slot_interface &device)
void b16_state::floppy_formats(format_registration &fr)
{
fr.add_pc_formats();
// fr.add(FLOPPY_NASLITE_FORMAT);
// fr.add(FLOPPY_IBMXDF_FORMAT);
fr.add_mfm_containers();
// fr.add(FLOPPY_PC98_FORMAT);
// fr.add(FLOPPY_PC98FDI_FORMAT);
// fr.add(FLOPPY_FDD_FORMAT);
// fr.add(FLOPPY_DCP_FORMAT);
// fr.add(FLOPPY_DIP_FORMAT);
// fr.add(FLOPPY_NFD_FORMAT);
}
TIMER_CALLBACK_MEMBER( b16_state::tc_tick_cb )
{
// logerror("tc off\n");
m_fdc->tc_w(false);
}
void b16_state::machine_start()
{
m_timer_tc = timer_alloc(FUNC(b16_state::tc_tick_cb), this);
}
void b16_state::machine_reset()
@ -467,7 +493,9 @@ void b16_state::b16(machine_config &config)
m_ints->out_int_callback().set(m_intm, FUNC(pic8259_device::ir6_w));
m_ints->in_sp_callback().set_constant(0);
UPD765A(config, m_fdc, 8'000'000, false, false);
// clock unconfirmed, definitely want the ready line on
// would stop at `SEARCH_ADDRESS_MARK_HEADER` otherwise
UPD765A(config, m_fdc, XTAL(16'000'000) / 2, true, false);
m_fdc->intrq_wr_callback().set(m_intm, FUNC(pic8259_device::ir1_w));
m_fdc->drq_wr_callback().set([this] (int state) { logerror("drq %d\n", state);});
FLOPPY_CONNECTOR(config, "fdc:0", b16_floppies, "525dd", b16_state::floppy_formats).enable_sound(true);
@ -490,9 +518,6 @@ void b16_state::b16(machine_config &config)
GFXDECODE(config, m_gfxdecode, m_palette, gfx_b16);
// TODO: palette format is a guess
PALETTE(config, m_palette, palette_device::BRG_3BIT).set_entries(8);
// Unconfirmed, just to have something to load with
SOFTWARE_LIST(config, "pc_disk_list").set_compatible("ibm5150");
}
void b16_state::b16ex2(machine_config &config)