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mikie: Add 74LS259 latch (nw)

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This commit is contained in:
AJR 2017-08-14 22:34:27 -04:00
parent e1954ba204
commit 97c4f2065d
3 changed files with 36 additions and 31 deletions
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46
src/mame/drivers/mikie.cpp
View File

@ -44,6 +44,7 @@ Stephh's notes (based on the games M6809 code and some tests) :
#include "cpu/z80/z80.h"
#include "cpu/m6809/m6809.h"
#include "machine/74259.h"
#include "machine/gen_latch.h"
#include "machine/watchdog.h"
#include "sound/sn76496.h"
@ -72,25 +73,30 @@ READ8_MEMBER(mikie_state::mikie_sh_timer_r)
return clock;
}
WRITE8_MEMBER(mikie_state::mikie_sh_irqtrigger_w)
WRITE_LINE_MEMBER(mikie_state::sh_irqtrigger_w)
{
if (m_last_irq == 0 && data == 1)
if (state)
{
// setting bit 0 low then high triggers IRQ on the sound CPU
m_audiocpu->set_input_line_and_vector(0, HOLD_LINE, 0xff);
}
m_last_irq = data;
}
WRITE8_MEMBER(mikie_state::mikie_coin_counter_w)
WRITE_LINE_MEMBER(mikie_state::coin_counter_1_w)
{
machine().bookkeeping().coin_counter_w(offset, data);
machine().bookkeeping().coin_counter_w(0, state);
}
WRITE8_MEMBER(mikie_state::irq_mask_w)
WRITE_LINE_MEMBER(mikie_state::coin_counter_2_w)
{
m_irq_mask = data & 1;
machine().bookkeeping().coin_counter_w(1, state);
}
WRITE_LINE_MEMBER(mikie_state::irq_mask_w)
{
m_irq_mask = state;
if (!m_irq_mask)
m_maincpu->set_input_line(M6809_IRQ_LINE, CLEAR_LINE);
}
/*************************************
@ -101,10 +107,7 @@ WRITE8_MEMBER(mikie_state::irq_mask_w)
static ADDRESS_MAP_START( mikie_map, AS_PROGRAM, 8, mikie_state )
AM_RANGE(0x0000, 0x00ff) AM_RAM
AM_RANGE(0x2000, 0x2001) AM_WRITE(mikie_coin_counter_w)
AM_RANGE(0x2002, 0x2002) AM_WRITE(mikie_sh_irqtrigger_w)
AM_RANGE(0x2006, 0x2006) AM_WRITE(mikie_flipscreen_w)
AM_RANGE(0x2007, 0x2007) AM_WRITE(irq_mask_w)
AM_RANGE(0x2000, 0x2007) AM_DEVWRITE("mainlatch", ls259_device, write_d0)
AM_RANGE(0x2100, 0x2100) AM_DEVWRITE("watchdog", watchdog_timer_device, reset_w)
AM_RANGE(0x2200, 0x2200) AM_WRITE(mikie_palettebank_w)
AM_RANGE(0x2300, 0x2300) AM_WRITENOP // ???
@ -239,31 +242,38 @@ GFXDECODE_END
void mikie_state::machine_start()
{
save_item(NAME(m_palettebank));
save_item(NAME(m_last_irq));
save_item(NAME(m_irq_mask));
}
void mikie_state::machine_reset()
{
m_palettebank = 0;
m_last_irq = 0;
}
INTERRUPT_GEN_MEMBER(mikie_state::vblank_irq)
{
if(m_irq_mask)
device.execute().set_input_line(0, HOLD_LINE);
if (m_irq_mask)
device.execute().set_input_line(M6809_IRQ_LINE, ASSERT_LINE);
}
static MACHINE_CONFIG_START( mikie )
/* basic machine hardware */
MCFG_CPU_ADD("maincpu", M6809, OSC/12)
MCFG_CPU_ADD("maincpu", M6809, OSC/12) // 9A (surface scratched)
MCFG_CPU_PROGRAM_MAP(mikie_map)
MCFG_CPU_VBLANK_INT_DRIVER("screen", mikie_state, vblank_irq)
MCFG_CPU_ADD("audiocpu", Z80, CLK)
MCFG_CPU_ADD("audiocpu", Z80, CLK) // 4E (surface scratched)
MCFG_CPU_PROGRAM_MAP(sound_map)
MCFG_DEVICE_ADD("mainlatch", LS259, 0) // 6I
MCFG_ADDRESSABLE_LATCH_Q0_OUT_CB(WRITELINE(mikie_state, coin_counter_1_w)) // COIN1
MCFG_ADDRESSABLE_LATCH_Q1_OUT_CB(WRITELINE(mikie_state, coin_counter_2_w)) // COIN2
MCFG_ADDRESSABLE_LATCH_Q2_OUT_CB(WRITELINE(mikie_state, sh_irqtrigger_w)) // SOUNDON
MCFG_ADDRESSABLE_LATCH_Q3_OUT_CB(NOOP) // END (not used?)
MCFG_ADDRESSABLE_LATCH_Q6_OUT_CB(WRITELINE(mikie_state, flipscreen_w)) // FLIP
MCFG_ADDRESSABLE_LATCH_Q7_OUT_CB(WRITELINE(mikie_state, irq_mask_w)) // INT
MCFG_WATCHDOG_ADD("watchdog")
/* video hardware */

12
src/mame/includes/mikie.h
View File

@ -28,9 +28,6 @@ public:
tilemap_t *m_bg_tilemap;
int m_palettebank;
/* misc */
int m_last_irq;
/* devices */
required_device<cpu_device> m_maincpu;
required_device<cpu_device> m_audiocpu;
@ -39,13 +36,14 @@ public:
uint8_t m_irq_mask;
DECLARE_READ8_MEMBER(mikie_sh_timer_r);
DECLARE_WRITE8_MEMBER(mikie_sh_irqtrigger_w);
DECLARE_WRITE8_MEMBER(mikie_coin_counter_w);
DECLARE_WRITE8_MEMBER(irq_mask_w);
DECLARE_WRITE_LINE_MEMBER(sh_irqtrigger_w);
DECLARE_WRITE_LINE_MEMBER(coin_counter_1_w);
DECLARE_WRITE_LINE_MEMBER(coin_counter_2_w);
DECLARE_WRITE_LINE_MEMBER(irq_mask_w);
DECLARE_WRITE8_MEMBER(mikie_videoram_w);
DECLARE_WRITE8_MEMBER(mikie_colorram_w);
DECLARE_WRITE8_MEMBER(mikie_palettebank_w);
DECLARE_WRITE8_MEMBER(mikie_flipscreen_w);
DECLARE_WRITE_LINE_MEMBER(flipscreen_w);
TILE_GET_INFO_MEMBER(get_bg_tile_info);
virtual void machine_start() override;
virtual void machine_reset() override;

9
src/mame/video/mikie.cpp
View File

@ -108,13 +108,10 @@ WRITE8_MEMBER(mikie_state::mikie_palettebank_w)
}
}
WRITE8_MEMBER(mikie_state::mikie_flipscreen_w)
WRITE_LINE_MEMBER(mikie_state::flipscreen_w)
{
if (flip_screen() != (data & 0x01))
{
flip_screen_set(data & 0x01);
machine().tilemap().mark_all_dirty();
}
flip_screen_set(state);
machine().tilemap().mark_all_dirty();
}
TILE_GET_INFO_MEMBER(mikie_state::get_bg_tile_info)