mirror of
https://github.com/MoleskiCoder/EightBit.git
synced 2024-09-29 00:54:54 +00:00
97272d650d
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
55 lines
1.5 KiB
C++
55 lines
1.5 KiB
C++
#include "stdafx.h"
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#include "BigEndianProcessor.h"
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EightBit::BigEndianProcessor::BigEndianProcessor(Bus& memory)
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: Processor(memory) {}
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EightBit::register16_t EightBit::BigEndianProcessor::getWord() {
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const auto high = BUS().read();
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++BUS().ADDRESS();
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const auto low = BUS().read();
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return register16_t(low, high);
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}
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void EightBit::BigEndianProcessor::setWord(const register16_t value) {
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BUS().write(value.high);
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++BUS().ADDRESS();
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BUS().write(value.low);
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}
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EightBit::register16_t EightBit::BigEndianProcessor::getWordPaged(uint8_t page, uint8_t offset) {
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const auto high = getBytePaged(page, offset);
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++BUS().ADDRESS().low;
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const auto low = BUS().read();
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return register16_t(low, high);
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}
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void EightBit::BigEndianProcessor::setWordPaged(uint8_t page, uint8_t offset, register16_t value) {
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setBytePaged(page, offset, value.high);
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++BUS().ADDRESS().low;
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BUS().read(value.low);
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}
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EightBit::register16_t EightBit::BigEndianProcessor::fetchWord() {
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const auto high = fetchByte();
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const auto low = fetchByte();
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return register16_t(low, high);
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}
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void EightBit::BigEndianProcessor::pushWord(const register16_t value) {
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push(value.low);
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push(value.high);
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}
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EightBit::register16_t EightBit::BigEndianProcessor::popWord() {
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const auto high = pop();
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const auto low = pop();
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return register16_t(low, high);
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}
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EightBit::register16_t EightBit::BigEndianProcessor::peekWord(const register16_t address) {
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const auto high = BUS().peek(address);
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const auto low = BUS().peek(address + 1);
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return register16_t(low, high);
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}
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