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konami/k051733.cpp: Suppress side effects for debugger reads, use logmacro.h logging, and cleaned up code. (#13316)

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cam900 2025-02-07 01:15:38 +09:00 committed by GitHub
parent 13d5eed517
commit f810cbeba1
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1 changed files with 24 additions and 26 deletions
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50
src/mame/konami/k051733.cpp
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@ -57,7 +57,6 @@ reads from 0x0006, and only uses bit 1.
#include "emu.h"
#include "k051733.h"
#include "konami_helper.h"
#define VERBOSE 0
#include "logmacro.h"
@ -88,9 +87,7 @@ void k051733_device::device_start()
void k051733_device::device_reset()
{
int i;
for (i = 0; i < 0x20; i++)
for (int i = 0; i < 0x20; i++)
m_ram[i] = 0;
m_rng = 0;
@ -102,13 +99,13 @@ void k051733_device::device_reset()
void k051733_device::write(offs_t offset, uint8_t data)
{
//logerror("%s: write %02x to 051733 address %02x\n", m_maincpu->pc(), data, offset);
LOG("%s: write %02x to 051733 address %02x\n", machine().describe_context(), data, offset);
m_ram[offset] = data;
}
static int k051733_int_sqrt( uint32_t op )
static int k051733_int_sqrt(uint32_t op)
{
uint32_t i = 0x8000;
uint32_t step = 0x4000;
@ -128,15 +125,15 @@ static int k051733_int_sqrt( uint32_t op )
uint8_t k051733_device::read(offs_t offset)
{
int op1 = (m_ram[0x00] << 8) | m_ram[0x01];
int op2 = (m_ram[0x02] << 8) | m_ram[0x03];
int op3 = (m_ram[0x04] << 8) | m_ram[0x05];
int const op1 = (m_ram[0x00] << 8) | m_ram[0x01];
int const op2 = (m_ram[0x02] << 8) | m_ram[0x03];
int const op3 = (m_ram[0x04] << 8) | m_ram[0x05];
int rad = (m_ram[0x06] << 8) | m_ram[0x07];
int yobj1c = (m_ram[0x08] << 8) | m_ram[0x09];
int xobj1c = (m_ram[0x0a] << 8) | m_ram[0x0b];
int yobj2c = (m_ram[0x0c] << 8) | m_ram[0x0d];
int xobj2c = (m_ram[0x0e] << 8) | m_ram[0x0f];
int const rad = (m_ram[0x06] << 8) | m_ram[0x07];
int const yobj1c = (m_ram[0x08] << 8) | m_ram[0x09];
int const xobj1c = (m_ram[0x0a] << 8) | m_ram[0x0b];
int const yobj2c = (m_ram[0x0c] << 8) | m_ram[0x0d];
int const xobj2c = (m_ram[0x0e] << 8) | m_ram[0x0f];
switch (offset)
{
@ -165,33 +162,34 @@ uint8_t k051733_device::read(offs_t offset)
case 0x04:
return k051733_int_sqrt(op3 << 16) >> 8;
case 0x05:
return k051733_int_sqrt(op3 << 16) & 0xff;
case 0x06:
m_rng += m_ram[0x13];
return m_rng; //RNG read, used by Chequered Flag for differentiate cars, implementation is a raw guess
{
uint8_t const rng = m_rng + m_ram[0x13];
if (!machine().side_effects_disabled())
m_rng = rng;
return rng; //RNG read, used by Chequered Flag for differentiate cars, implementation is a raw guess
}
case 0x07:{ /* note: Chequered Flag definitely wants all these bits to be enabled */
case 0x07: /* note: Chequered Flag definitely wants all these bits to be enabled */
if (xobj1c + rad < xobj2c)
return 0xff;
if (xobj2c + rad < xobj1c)
else if (xobj2c + rad < xobj1c)
return 0xff;
if (yobj1c + rad < yobj2c)
else if (yobj1c + rad < yobj2c)
return 0xff;
if (yobj2c + rad < yobj1c)
else if (yobj2c + rad < yobj1c)
return 0xff;
else
return 0;
return 0;
}
case 0x0e: /* best guess */
return (xobj2c - xobj1c) >> 8;
case 0x0f:
return (xobj2c - xobj1c) & 0xff;
default:
return m_ram[offset];
}