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barcrest/mpu4.cpp: Fixed regression for games using sampled sound. [James Wallace]

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This commit is contained in:
Vas Crabb 2022-11-29 16:09:59 +11:00
parent 78599e367c
commit 7f1fa1f226
2 changed files with 26 additions and 26 deletions
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50
src/mame/barcrest/mpu4.cpp
View File

@ -225,6 +225,8 @@ To change between them, follow these instructions:
#include "mpu4.lh"
#include "mpu4ext.lh"
#include <cmath>
/*
LED Segments related to pins (5 is not connected):
@ -289,7 +291,7 @@ void mpu4_state::lamp_extend_large(uint8_t data, uint8_t column, bool active)
for (int i = 0; i < 8; i++)
{
// this includes bit 7, so you don't get a true 128 extra lamps as the last row is always 0 or 1 depending on which set of 64 we're dealing with
m_lamps[(8*column)+i+128+lampbase] = BIT(data, i);
m_lamps[(8*column) + i + 128 + lampbase] = BIT(data, i);
}
m_lamp_strobe_ext[bit7] = column;
}
@ -302,10 +304,10 @@ void mpu4_state::lamp_extend_large(uint8_t data, uint8_t column, bool active)
}
}
void mpu4_state::led_write_extender(uint8_t latch, uint8_t data, uint8_t starting_column)
void mpu4_state::led_write_extender(uint8_t latch, uint8_t data, uint8_t column)
{
const uint8_t diff = (latch ^ m_last_latch) & latch;
const uint8_t ext_strobe = (7 - starting_column) * 8;
const uint8_t ext_strobe = (7 - column) * 8;
data = ~data;//invert drive lines
for (int i = 0; i < 5; i++)
@ -383,16 +385,16 @@ void mpu4_state::update_meters()
break;
}
m_meters->update(7, (data & 0x80));
m_meters->update(7, data & 0x80);
for (int meter = 0; meter < 4; meter ++)
for (int meter = 0; meter < 4; meter++)
{
m_meters->update(meter, (data & (1 << meter)));
}
if (m_reel_mux == STANDARD_REEL)
{
for (int meter = 4; meter < 7; meter ++)
for (int meter = 4; meter < 7; meter++)
{
m_meters->update(meter, (data & (1 << meter)));
}
@ -535,7 +537,7 @@ void mpu4_state::pia_ic3_porta_w(uint8_t data)
for (int i = 0; i < 8; i++)
{
m_lamps[(8*m_input_strobe)+i] = BIT(data, i);
m_lamps[(8*m_input_strobe) + i] = BIT(data, i);
}
m_lamp_strobe = m_input_strobe;
}
@ -556,7 +558,7 @@ void mpu4_state::pia_ic3_portb_w(uint8_t data)
for (int i = 0; i < 8; i++)
{
m_lamps[(8*m_input_strobe)+i+64] = BIT(data, i);
m_lamps[(8*m_input_strobe) + i + 64] = BIT(data, i);
}
m_lamp_strobe2 = m_input_strobe;
}
@ -695,17 +697,17 @@ uint8_t mpu4_state::pia_ic4_portb_r()
{
m_ic4_input_b = 0x00;
if (m_serial_output) m_ic4_input_b |= 0x80;
if (m_serial_output) m_ic4_input_b |= 0x80;
if (!m_reel_mux)
{
if (m_optic_pattern & 0x01) m_ic4_input_b |= 0x40; /* reel A tab */
if (m_optic_pattern & 0x01) m_ic4_input_b |= 0x40; /* reel A tab */
if (m_optic_pattern & 0x02) m_ic4_input_b |= 0x20; /* reel B tab */
if (m_optic_pattern & 0x02) m_ic4_input_b |= 0x20; /* reel B tab */
if (m_optic_pattern & 0x04) m_ic4_input_b |= 0x10; /* reel C tab */
if (m_optic_pattern & 0x04) m_ic4_input_b |= 0x10; /* reel C tab */
if (m_optic_pattern & 0x08) m_ic4_input_b |= 0x08; /* reel D tab */
if (m_optic_pattern & 0x08) m_ic4_input_b |= 0x08; /* reel D tab */
}
else
{
@ -817,7 +819,6 @@ void mpu4_state::pia_ic5_porta_w(uint8_t data)
{
m_mpu4leds[((m_input_strobe | 8) << 3) | i] = BIT(data, i);
}
// m_digits[m_input_strobe | 8] = data;
}
break;
@ -837,7 +838,7 @@ void mpu4_state::pia_ic5_porta_w(uint8_t data)
#if 0
if ((m_ic23_active) && m_card_live)
{
for(int i=0; i<8; i++)
for (int i = 0; i < 8; i++)
{
m_mpu4leds[(m_last_b7 << 6) | (m_input_strobe << 3) | i] = BIT(~data, i);
}
@ -1023,7 +1024,7 @@ void mpu4_state::pia_ic6_porta_w(uint8_t data)
if (m_ay8913.found())
{
m_ay_data = data;
update_ay();//
update_ay();
}
}
@ -1035,7 +1036,7 @@ WRITE_LINE_MEMBER(mpu4_state::pia_ic6_ca2_w)
{
if ( state ) m_ay8913_address |= 0x01;
else m_ay8913_address &= ~0x01;
update_ay();//
update_ay();
}
}
@ -1104,7 +1105,7 @@ uint8_t mpu4_state::pia_ic7_portb_r()
all eight meters are driven from this port, giving the 8 line driver chip
9 connections in total. */
//This may be overkill, but the meter sensing is VERY picky
//This may be overkill, but the meter sensing is VERY picky.
uint8_t combined_meter = m_meters->get_activity(0) | m_meters->get_activity(1) |
m_meters->get_activity(2) | m_meters->get_activity(3) |
@ -1239,12 +1240,12 @@ uint8_t mpu4_state::pia_gb_portb_r()
//
if ( m_msm6376->nar_r() ) data |= 0x80;
else data &= ~0x80;
else data &= ~0x80;
if ( m_msm6376->busy_r() ) data |= 0x40;
else data &= ~0x40;
else data &= ~0x40;
return ( data | m_expansion_latch );
return data | m_expansion_latch;
}
WRITE_LINE_MEMBER(mpu4_state::pia_gb_ca2_w)
@ -1299,11 +1300,10 @@ void mpu4_state::ic3ss_w(offs_t offset, uint8_t data)
m_t3l = data;
}
float num = (1720000/((m_t3l + 1)*(m_t3h + 1)));
float denom1 = ((m_t3h *(m_t3l + 1)+ 1)/(2*(m_t1 + 1)));
float const num = float(1'720'000) / ((m_t3l + 1) * (m_t3h + 1));
float const denom = std::ceil(float(m_t3h * (m_t3l + 1) + 1) / (2 * (m_t1 + 1))); //need to round up, this gives same precision as chip
uint8_t denom2 = denom1 + 0.5f;//need to round up, this gives same precision as chip
uint8_t freq=num*denom2;
int const freq = int(num * denom);
if (freq)
{

2
src/mame/barcrest/mpu4.h
View File

@ -360,7 +360,7 @@ protected:
void mpu4_memmap_bl_characteriser_blastbank(address_map &map);
void lamp_extend_small(uint8_t data);
void lamp_extend_large(uint8_t data,uint8_t column,bool active);
void lamp_extend_large(uint8_t data, uint8_t column, bool active);
void led_write_extender(uint8_t latch, uint8_t data, uint8_t column);
void update_meters();
void ic23_update();