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spcforce, meteors: Modernize interrupt handling and fix freeze on soft reset

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This commit is contained in:
AJR 2022-05-02 17:49:52 -04:00
parent 7c576840d6
commit c84a8f3ae6
2 changed files with 6 additions and 19 deletions
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21
src/mame/drivers/spcforce.cpp
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@ -40,6 +40,7 @@ TODO:
#include "cpu/i8085/i8085.h"
#include "machine/gen_latch.h"
#include "machine/input_merger.h"
#include "emupal.h"
#include "screen.h"
#include "speaker.h"
@ -54,7 +55,6 @@ void spcforce_state::machine_start()
save_item(NAME(m_sn1_ready));
save_item(NAME(m_sn2_ready));
save_item(NAME(m_sn3_ready));
save_item(NAME(m_irq_mask));
}
void spcforce_state::sn76496_latch_w(uint8_t data)
@ -115,11 +115,6 @@ void spcforce_state::misc_outputs_w(uint8_t data)
machine().bookkeeping().coin_counter_w(1, BIT(data, 3));
}
WRITE_LINE_MEMBER(spcforce_state::irq_mask_w)
{
m_irq_mask = state;
}
WRITE_LINE_MEMBER(spcforce_state::unknown_w)
{
// written very frequently
@ -274,19 +269,12 @@ void spcforce_state::spcforce_palette(palette_device &palette) const
}
INTERRUPT_GEN_MEMBER(spcforce_state::vblank_irq)
{
if(m_irq_mask)
device.execute().set_input_line(3, HOLD_LINE);
}
void spcforce_state::spcforce(machine_config &config)
{
/* basic machine hardware */
/* FIXME: The 8085A had a max clock of 6MHz, internally divided by 2! */
I8085A(config, m_maincpu, 8000000 * 2); /* 4.00 MHz??? */
m_maincpu->set_addrmap(AS_PROGRAM, &spcforce_state::spcforce_map);
m_maincpu->set_vblank_int("screen", FUNC(spcforce_state::vblank_irq));
I8035(config, m_audiocpu, 6144000); /* divisor ??? */
m_audiocpu->set_addrmap(AS_PROGRAM, &spcforce_state::spcforce_sound_map);
@ -298,9 +286,11 @@ void spcforce_state::spcforce(machine_config &config)
LS259(config, m_mainlatch);
m_mainlatch->q_out_cb<3>().set(FUNC(spcforce_state::flip_screen_w));
m_mainlatch->q_out_cb<6>().set(FUNC(spcforce_state::irq_mask_w));
m_mainlatch->q_out_cb<6>().set("vblirq", FUNC(input_merger_device::in_w<1>));
m_mainlatch->q_out_cb<7>().set(FUNC(spcforce_state::unknown_w));
INPUT_MERGER_ALL_HIGH(config, "vblirq").output_handler().set_inputline(m_maincpu, I8085_RST75_LINE);
/* video hardware */
screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER));
screen.set_refresh_hz(60);
@ -309,6 +299,7 @@ void spcforce_state::spcforce(machine_config &config)
screen.set_visarea(0*8, 32*8-1, 0*8, 28*8-1);
screen.set_screen_update(FUNC(spcforce_state::screen_update));
screen.set_palette(m_palette);
screen.screen_vblank().set("vblirq", FUNC(input_merger_device::in_w<0>));
GFXDECODE(config, m_gfxdecode, m_palette, gfx_spcforce);
PALETTE(config, m_palette, FUNC(spcforce_state::spcforce_palette), std::size(COLORTABLE_SOURCE));
@ -335,7 +326,7 @@ void spcforce_state::meteors(machine_config &config)
{
spcforce(config);
m_mainlatch->q_out_cb<3>().set_nop();
m_mainlatch->q_out_cb<5>().set(FUNC(spcforce_state::irq_mask_w)); // ??
m_mainlatch->q_out_cb<5>().set("vblirq", FUNC(input_merger_device::in_w<1>)); // ??
m_mainlatch->q_out_cb<6>().set(FUNC(spcforce_state::flip_screen_w)); // irq mask isn't here, gets written too early causing the game to not boot, see startup code
}

4
src/mame/includes/spcforce.h
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@ -43,7 +43,6 @@ private:
DECLARE_READ_LINE_MEMBER(t0_r);
void soundtrigger_w(uint8_t data);
void misc_outputs_w(uint8_t data);
DECLARE_WRITE_LINE_MEMBER(irq_mask_w);
DECLARE_WRITE_LINE_MEMBER(flip_screen_w);
DECLARE_WRITE_LINE_MEMBER(unknown_w);
@ -51,8 +50,6 @@ private:
uint32_t screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
INTERRUPT_GEN_MEMBER(vblank_irq);
void spcforce_map(address_map &map);
void spcforce_sound_map(address_map &map);
@ -73,7 +70,6 @@ private:
int m_sn1_ready = 0;
int m_sn2_ready = 0;
int m_sn3_ready = 0;
uint8_t m_irq_mask = 0;
};
#endif // MAME_INCLUDES_SPCFORCE_H