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heathkit/tlb.cpp: Implemented H19 NMI enable flag. (#11486)

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Fixes UltraROM self-diagnostic test.
This commit is contained in:
Mark Garlanger 2023-08-16 12:57:55 -05:00 committed by GitHub
parent 3bfe449549
commit 01ea09d5b0
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2 changed files with 39 additions and 5 deletions
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38
src/mame/heathkit/tlb.cpp
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@ -15,8 +15,6 @@
Input can also come from the serial port.
TODO:
- determine why ULTRA ROM's self-diag (ESC |) fails for the ROM and
scratchpad memory
- INS8250 needs to implement "Set Break" (LCR, bit 6) before Break key
will function as expected.
- 49/50 row mode does not work when DOT clocks are programmed as documented
@ -161,8 +159,9 @@ void heath_tlb_device::io_map(address_map &map)
map(0x00, 0x00).mirror(0x1f).portr("SW401");
map(0x20, 0x20).mirror(0x1f).portr("SW402");
map(0x40, 0x47).mirror(0x18).rw(m_ace, FUNC(ins8250_device::ins8250_r), FUNC(ins8250_device::ins8250_w));
map(0x60, 0x60).mirror(0x1e).w(m_crtc, FUNC(mc6845_device::address_w));
map(0x61, 0x61).mirror(0x1e).rw(m_crtc, FUNC(mc6845_device::register_r), FUNC(mc6845_device::register_w));
map(0x60, 0x60).mirror(0x1a).select(0x04).w(FUNC(heath_tlb_device::crtc_addr_w));
map(0x61, 0x61).mirror(0x1a).select(0x04).rw(FUNC(heath_tlb_device::crtc_reg_r), FUNC(heath_tlb_device::crtc_reg_w));
map(0x80, 0x80).mirror(0x1f).r(FUNC(heath_tlb_device::kbd_key_r));
map(0xa0, 0xa0).mirror(0x1f).r(FUNC(heath_tlb_device::kbd_flags_r));
map(0xc0, 0xc0).mirror(0x1f).w(FUNC(heath_tlb_device::key_click_w));
@ -181,6 +180,7 @@ void heath_tlb_device::device_start()
save_item(NAME(m_keyboard_irq_raised));
save_item(NAME(m_serial_irq_raised));
save_item(NAME(m_break_key_irq_raised));
save_item(NAME(m_allow_vsync_nmi));
m_strobe = false;
m_key_click_active = false;
@ -191,6 +191,7 @@ void heath_tlb_device::device_start()
m_keyboard_irq_raised = false;
m_serial_irq_raised = false;
m_break_key_irq_raised = false;
m_allow_vsync_nmi = false;
m_key_click_timer = timer_alloc(FUNC(heath_tlb_device::key_click_off), this);
m_bell_timer = timer_alloc(FUNC(heath_tlb_device::bell_off), this);
@ -201,6 +202,7 @@ void heath_tlb_device::device_reset()
m_strobe = false;
m_key_click_active = false;
m_bell_active = false;
m_allow_vsync_nmi = false;
}
void heath_tlb_device::key_click_w(uint8_t data)
@ -280,6 +282,32 @@ void heath_tlb_device::mm5740_data_ready_w(int state)
}
}
void heath_tlb_device::crtc_addr_w(offs_t reg, uint8_t val)
{
m_allow_vsync_nmi = bool(BIT(reg,2));
m_crtc->address_w(val);
}
uint8_t heath_tlb_device::crtc_reg_r(offs_t reg)
{
m_allow_vsync_nmi = bool(BIT(reg,2));
return m_crtc->register_r();
}
void heath_tlb_device::crtc_reg_w(offs_t reg, uint8_t val)
{
m_allow_vsync_nmi = bool(BIT(reg,2));
m_crtc->register_w(val);
}
void heath_tlb_device::crtc_vsync_w(int val)
{
m_maincpu->set_input_line(INPUT_LINE_NMI, m_allow_vsync_nmi ? val: CLEAR_LINE);
}
void heath_tlb_device::serial_irq_w(int state)
{
m_serial_irq_raised = bool(state);
@ -871,7 +899,7 @@ void heath_tlb_device::device_add_mconfig(machine_config &config)
m_crtc->set_char_width(8);
m_crtc->set_update_row_callback(FUNC(heath_tlb_device::crtc_update_row));
// frame pulse
m_crtc->out_vsync_callback().set_inputline(m_maincpu, INPUT_LINE_NMI);
m_crtc->out_vsync_callback().set(FUNC(heath_tlb_device::crtc_vsync_w));
// serial port
INS8250(config, m_ace, INS8250_CLOCK);

6
src/mame/heathkit/tlb.h
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@ -86,6 +86,11 @@ private:
int mm5740_control_r();
void mm5740_data_ready_w(int state);
void crtc_addr_w(offs_t reg, uint8_t val);
uint8_t crtc_reg_r(offs_t reg);
void crtc_reg_w(offs_t reg, uint8_t val);
void crtc_vsync_w(int val);
TIMER_CALLBACK_MEMBER(key_click_off);
TIMER_CALLBACK_MEMBER(bell_off);
@ -114,6 +119,7 @@ private:
bool m_keyboard_irq_raised;
bool m_serial_irq_raised;
bool m_break_key_irq_raised;
bool m_allow_vsync_nmi;
};
// Heath TLB with Super19 ROM