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casio/fp1100.cpp: attempt sub hsync WAIT semantics

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This commit is contained in:
angelosa 2024-07-12 11:20:20 +02:00
parent 032931d8ba
commit 0e52f3adf6
1 changed files with 44 additions and 11 deletions
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55
src/mame/casio/fp1100.cpp
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@ -12,9 +12,10 @@ TODO:
- Memory maps and machine configuration for FP-1000 with reduced VRAM;
- Unimplemented instruction PER triggered in sub CPU;
- SCREEN 1 mode has heavy corrupted GFXs and runs at half speed, interlace mode?
- Cassette Load is untested and probably not working, uses a complex 6 pin discrete circuitry;
- Sub CPU is supposed to be in WAIT except in horizontal blanking period, WAIT is not emulated.
- bus slots (uPD765 FDC, ROMPACK, RAMPACK)
- Cassette Load is really not working, uses a complex 6 pin discrete circuitry;
- Sub CPU needs proper WAIT line from uPD7801;
- Main CPU waitstates;
- bus slots (uPD765 FDC, ROMPACK, RAMPACK), rewrite
===================================================================================================
@ -137,6 +138,7 @@ private:
u8 id = 0;
}m_slot[8];
// TODO: descramble
struct {
u8 porta = 0;
u8 portb = 0;
@ -152,6 +154,10 @@ private:
template<int Line> void int_w(int state);
TIMER_CALLBACK_MEMBER(update_interrupts);
IRQ_CALLBACK_MEMBER(restart_cb);
int m_hsync_state = 0;
bool m_sub_wait = false;
void hsync_cb(int state);
};
MC6845_UPDATE_ROW( fp1100_state::crtc_update_row )
@ -250,6 +256,7 @@ u8 fp1100_state::slot_id_r()
// TODO: convert to `memory_view`
u8 fp1100_state::memory_r(offs_t offset)
{
// TODO: verify this odd range
if (offset < 0x9000 && !m_bank_sel)
return m_ipl[offset];
else
@ -304,6 +311,16 @@ template <unsigned N> void fp1100_state::vram_w(offs_t offset, u8 data)
{
// NOTE: POST makes sure to punt in FP-1000 mode if this don't XOR the value
m_videoram[N][offset] = ~data;
if (!machine().side_effects_disabled())
{
if (!m_sub_wait && m_hsync_state)
{
// TODO: actual uPD7801 WAIT line
m_subcpu->set_input_line(INPUT_LINE_HALT, ASSERT_LINE);
m_sub_wait = true;
}
}
}
/*
@ -381,8 +398,8 @@ u8 fp1100_state::portb_r()
//m_subcpu->set_input_line(UPD7810_INTF0, BIT(data, 7) ? ASSERT_LINE : CLEAR_LINE);
if (BIT(m_kbd_row, 5))
return data;
else
return 0;
return 0;
}
/*
@ -452,6 +469,19 @@ IRQ_CALLBACK_MEMBER(fp1100_state::restart_cb)
return vector;
}
// IRQ section (sub)
void fp1100_state::hsync_cb(int state)
{
m_hsync_state = state;
if (m_sub_wait && !state)
{
m_subcpu->set_input_line(INPUT_LINE_HALT, CLEAR_LINE);
m_sub_wait = false;
}
}
static INPUT_PORTS_START( fp1100 )
PORT_START("KEY.0")
PORT_BIT(0xff, IP_ACTIVE_HIGH, IPT_UNUSED)
@ -693,13 +723,14 @@ void fp1100_state::machine_start()
void fp1100_state::machine_reset()
{
m_sub_wait = false;
m_sub_irq_status = false;
int i;
u8 slot_type;
// TODO: move and refactor
const u8 id_type[4] = { 0xff, 0x00, 0x01, 0x04};
for(i=0;i<8;i++)
for(int i = 0; i < 8; i++)
{
slot_type = (ioport("SLOTS")->read() >> i*2) & 3;
const u8 slot_type = (ioport("SLOTS")->read() >> i*2) & 3;
m_slot[i].id = id_type[slot_type];
}
@ -739,7 +770,7 @@ void fp1100_state::fp1100(machine_config &config)
GENERIC_LATCH_8(config, "sub2main");
// NOTE: Needs some sync otherwise it outright refuses to boot
config.set_perfect_quantum("maincpu");
config.set_perfect_quantum("sub");
// config.set_perfect_quantum("sub");
CENTRONICS(config, m_centronics, centronics_devices, "printer");
m_centronics->busy_handler().set(FUNC(fp1100_state::centronics_busy_w));
@ -753,8 +784,9 @@ void fp1100_state::fp1100(machine_config &config)
TIMER(config, "kansas_w").configure_periodic(FUNC(fp1100_state::kansas_w), attotime::from_hz(4800));
screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER));
// doesn't matter, will be reset by 6845 anyway
screen.set_refresh_hz(60);
screen.set_vblank_time(ATTOSECONDS_IN_USEC(2500)); // not accurate
screen.set_vblank_time(ATTOSECONDS_IN_USEC(2500));
screen.set_size(640, 480);
screen.set_visarea_full();
screen.set_screen_update("crtc", FUNC(mc6845_device::screen_update));
@ -766,6 +798,7 @@ void fp1100_state::fp1100(machine_config &config)
m_crtc->set_show_border_area(false);
m_crtc->set_char_width(8);
m_crtc->set_update_row_callback(FUNC(fp1100_state::crtc_update_row));
m_crtc->out_hsync_callback().set(FUNC(fp1100_state::hsync_cb));
SPEAKER(config, "mono").front_center();
BEEP(config, "beeper", 950) // guess