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https://github.com/JorjBauer/aiie.git
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65 lines
1.2 KiB
C++
65 lines
1.2 KiB
C++
#include "mockingboard.h"
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#include <string.h>
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Mockingboard::Mockingboard()
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{
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}
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Mockingboard::~Mockingboard()
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{
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}
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void Mockingboard::Reset()
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{
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}
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uint8_t Mockingboard::readSwitches(uint8_t s)
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{
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// There are never any reads to the I/O switches
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return 0xFF;
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}
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void Mockingboard::writeSwitches(uint8_t s, uint8_t v)
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{
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// There are never any writes to the I/O switches
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}
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void Mockingboard::loadROM(uint8_t *toWhere)
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{
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// We don't need a ROM; we're going to work via direct interaction
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// with memory 0xC400 - 0xC4FF
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}
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uint8_t Mockingboard::read(uint16_t address)
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{
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address &= 0xFF;
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if ( (address >= 0x00 &&
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address <= 0x0F) ||
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(address >= 0x80 &&
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address <= 0x8F) ) {
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uint8_t idx = (address & 0x80 ? 1 : 0);
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return sy6522[idx].read(address & 0x0F);
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}
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return 0xFF;
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}
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void Mockingboard::write(uint16_t address, uint8_t val)
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{
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address &= 0xFF;
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if ( (address >= 0x00 &&
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address <= 0x0F) ||
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(address >= 0x80 &&
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address <= 0x8F) ) {
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uint8_t idx = (address & 0x80 ? 1 : 0);
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return sy6522[idx].write(address & 0x0F, val);
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}
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}
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void Mockingboard::update(uint32_t cycles)
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{
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sy6522[0].update(cycles);
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sy6522[1].update(cycles);
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}
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