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thedealr: Add timer hack to allow LED outputs to stabilize

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This commit is contained in:
AJR 2022-07-02 11:49:01 -04:00
parent 28a24a78b1
commit 3f883bdcb6
1 changed files with 16 additions and 5 deletions
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21
src/mame/seta/thedealr.cpp
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@ -67,6 +67,10 @@ private:
uint8_t irq_ack_r();
void unk_w(uint8_t data);
// machine
emu_timer *m_led_timer;
TIMER_CALLBACK_MEMBER(update_leds);
// video
void thedealr_palette(palette_device &palette) const;
uint32_t screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
@ -136,11 +140,8 @@ void thedealr_state::iox_p1_w(uint8_t data)
{
m_iox_leds = (m_iox_leds << 1) | BIT(data, 6);
// LED 0 = bet
// LED 1 = deal
// LED 4 = hold 1-5?
for (int i = 0; i < 8; i++)
m_leds[i] = BIT(m_iox_leds, i);
// HACK: retrigger timer to avoid output glitches (no latching signal seems to be provided)
m_led_timer->adjust(attotime::from_msec(2));
}
// Coin counters set by 0x40 command
@ -152,6 +153,15 @@ void thedealr_state::iox_p1_w(uint8_t data)
m_iox_p1 = data;
}
TIMER_CALLBACK_MEMBER(thedealr_state::update_leds)
{
// LED 0 = bet
// LED 1 = deal
// LED 4 = hold 1-5?
for (int i = 0; i < 8; i++)
m_leds[i] = BIT(m_iox_leds, i);
}
void thedealr_state::iox_p2_w(uint8_t data)
{
// HACK: MCU sets P2 strobes but then removes them before reading return lines from other half of P2
@ -436,6 +446,7 @@ GFXDECODE_END
void thedealr_state::machine_start()
{
m_leds.resolve();
m_led_timer = timer_alloc(FUNC(thedealr_state::update_leds), this);
m_iox_p1 = 0xff;
m_iox_p2 = 0xff;