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Temporarily perhaps, reintroduce post-read and pre-write bus events (for the NES)

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Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
This commit is contained in:
Adrian Conlon 2018-02-07 23:00:38 +00:00
parent 1bf2a9bdfb
commit 7f501ff29c
2 changed files with 7 additions and 1 deletions
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3
inc/Bus.h
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@ -10,8 +10,11 @@ namespace EightBit {
public:
virtual ~Bus() = default;
Signal<uint16_t> WritingByte;
Signal<uint16_t> WrittenByte;
Signal<uint16_t> ReadingByte;
Signal<uint16_t> ReadByte;
register16_t& ADDRESS();
uint8_t& DATA();

5
src/Bus.cpp
View File

@ -41,7 +41,9 @@ uint16_t EightBit::Bus::peekWord(uint16_t address) {
uint8_t EightBit::Bus::read() {
ReadingByte.fire(ADDRESS().word);
return reference();
const auto returned = reference();
ReadByte.fire(ADDRESS().word);
return returned;
}
uint8_t EightBit::Bus::read(uint16_t offset) {
@ -55,6 +57,7 @@ uint8_t EightBit::Bus::read(register16_t address) {
}
void EightBit::Bus::write(uint8_t value) {
WritingByte.fire(ADDRESS().word);
reference() = value;
WrittenByte.fire(ADDRESS().word);
}