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Tidy the i8080 interrupt handling to be more like the Z80 implementation

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Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
This commit is contained in:
Adrian Conlon 2017-12-04 23:20:55 +00:00
parent f1b3fc1932
commit 1bf797490b
1 changed files with 6 additions and 7 deletions

13
Intel8080/src/Intel8080.cpp

@ -266,15 +266,14 @@ int EightBit::Intel8080::step() {
ExecutingInstruction.fire(*this); ExecutingInstruction.fire(*this);
resetCycles(); resetCycles();
if (LIKELY(powered())) { if (LIKELY(powered())) {
uint8_t instruction; if (UNLIKELY(INT())) {
if (UNLIKELY(INT() && m_interruptEnable)) {
INT() = false; INT() = false;
di(); if (m_interruptEnable) {
instruction = BUS().DATA(); di();
} else { return execute(BUS().DATA());
instruction = fetchByte(); }
} }
return execute(instruction); return execute(fetchByte());
} }
return cycles(); return cycles();
} }