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Reflect that the I/O for Intel style processors isn't part of the CPU, but attached to the Bus and access controlled by the CPU.

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Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
This commit is contained in:
Adrian Conlon
2020-02-09 11:51:58 +00:00
parent dc37d61797
commit c8bdabf34f
24 changed files with 410 additions and 279 deletions
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16
src/Processor.cpp
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@@ -16,13 +16,17 @@ void EightBit::Processor::handleINT() {
raiseINT();
}
void EightBit::Processor::busWrite(const register16_t address, const uint8_t data) {
void EightBit::Processor::memoryWrite(const register16_t address, const uint8_t data) {
BUS().ADDRESS() = address;
busWrite(data);
memoryWrite(data);
}
void EightBit::Processor::busWrite(const uint8_t data) {
void EightBit::Processor::memoryWrite(const uint8_t data) {
BUS().DATA() = data;
memoryWrite();
}
void EightBit::Processor::memoryWrite() {
busWrite();
}
@@ -30,8 +34,12 @@ void EightBit::Processor::busWrite() {
BUS().write();
}
uint8_t EightBit::Processor::busRead(const register16_t address) {
uint8_t EightBit::Processor::memoryRead(const register16_t address) {
BUS().ADDRESS() = address;
return memoryRead();
}
uint8_t EightBit::Processor::memoryRead() {
return busRead();
}