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hitachi/b16.cpp: stub a bunch of keys, make it disk error explicitly

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This commit is contained in:
angelosa 2024-09-22 17:59:02 +02:00
parent afab68e6c2
commit bfb41f8322
1 changed files with 47 additions and 2 deletions
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49
src/mame/hitachi/b16.cpp
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@ -7,7 +7,11 @@ Hitachi B(asic Master?) 16000 series?
TODO:
- Barely anything is known about the HW;
- Requires a system disk to make it go further;
- Requires a compatible system disk to make it go further;
- hookup proper keyboard;
- FDC throws disk error, mon_w hookup is unconfirmed, doesn't seem to select a drive ...
- b16: hangs for checking bit 7 in vblank fashion at $80, either the DMA is at the
wrong spot or the earlier variant effectively don't have it.
- b16ex2: "error message 1101", bypassed between ports $80 and $48
- b16ex2: confirm kanji hookup;
@ -21,6 +25,7 @@ INTM / INTS 2x uPD8259AC @ 13D / 15D
Labelless CRTC, Fujitsu 6845 package
FDC is unpopulated on board, should be a 765 coupled with a SED9420C/AC
USART is unpopulated on board, assume i8251
PPI is unpopulated on board
BDC HN65013G025 @ 2A
CAL HN6223S @ 12K - Near bus slots
CA HN6022B @ 12L /
@ -108,6 +113,7 @@ public:
void b16(machine_config &config);
void b16ex2(machine_config &config);
DECLARE_INPUT_CHANGED_MEMBER(key_pressed);
protected:
virtual void video_start() override;
@ -119,6 +125,7 @@ protected:
private:
uint8_t m_crtc_vreg[0x100]{}, m_crtc_index = 0;
uint8_t m_port78 = 0;
uint8_t m_keyb_scancode = 0;
required_device<cpu_device> m_maincpu;
required_device<pit8253_device> m_pit;
@ -280,6 +287,8 @@ void b16_state::b16_io(address_map &map)
map(0x20, 0x20).w(FUNC(b16_state::crtc_address_w));
map(0x22, 0x22).w(FUNC(b16_state::crtc_data_w));
// map(0x28, 0x2b) keyboard, likely thru USART
map(0x28, 0x28).lr8(NAME([this]() {return m_keyb_scancode; }));
map(0x2a, 0x2a).lr8(NAME([]() { return 0x02; }));
// Jumper block?
// map(0x40, 0x40)
// map(0x42, 0x42)
@ -318,11 +327,47 @@ void b16_state::b16_io(address_map &map)
})
);
map(0x80, 0x89).rw(m_dma, FUNC(i8257_device::read), FUNC(i8257_device::write)).umask16(0x00ff);
// map(0x8020, 0x8023) external FDC? Checked at FDC irq
// map(0x00a0, 0x00bf) DMA upper segments or video clut
// map(0x8020, 0x8023) external FDC? Can branch at FDC irq
}
INPUT_CHANGED_MEMBER(b16_state::key_pressed)
{
m_ints->ir0_w(!newval);
m_keyb_scancode = (u8)param | (newval << 7);
}
static INPUT_PORTS_START( b16 )
// question marks denotes unknown keys, asterisks for empty chars
// KEY0
// ?1234567
// ? = left arrow (backspace?)
// KEY1
// 890-<backslash>***
PORT_START("KEY2")
// ?qwertyu
PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_Y) PORT_CHAR('Y') PORT_CHANGED_MEMBER(DEVICE_SELF, b16_state, key_pressed, 0x10 | 6)
// KEY3
// iop@[***
PORT_START("KEY4")
// asdfghjk
PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_A) PORT_CHAR('A') PORT_CHANGED_MEMBER(DEVICE_SELF, b16_state, key_pressed, 0x20)
// KEY5
// ?;:]****
PORT_START("KEY6")
// zxcvbnm,
PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_Z) PORT_CHAR('Z') PORT_CHANGED_MEMBER(DEVICE_SELF, b16_state, key_pressed, 0x30)
PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_X) PORT_CHAR('X') PORT_CHANGED_MEMBER(DEVICE_SELF, b16_state, key_pressed, 0x31)
PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_C) PORT_CHAR('C') PORT_CHANGED_MEMBER(DEVICE_SELF, b16_state, key_pressed, 0x32)
// PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_V) PORT_CHAR('V') PORT_CHANGED_MEMBER(DEVICE_SELF, b16_state, key_pressed, 0x33)
PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_B) PORT_CHAR('B') PORT_CHANGED_MEMBER(DEVICE_SELF, b16_state, key_pressed, 0x34)
INPUT_PORTS_END