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Double read on INC to pass a2audit tests

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This commit is contained in:
Ivan Izaguirre 2020-09-23 18:11:47 +02:00
parent 696038fa30
commit cd9c4e2b41
1 changed files with 4 additions and 0 deletions
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4
core6502/operations.go
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@ -13,6 +13,10 @@ func buildOpTransfer(regSrc int, regDst int) opFunc {
func buildOpIncDec(inc bool) opFunc { func buildOpIncDec(inc bool) opFunc {
return func(s *State, line []uint8, opcode opcode) { return func(s *State, line []uint8, opcode opcode) {
value := resolveValue(s, line, opcode) value := resolveValue(s, line, opcode)
if opcode.addressMode == modeAbsoluteX || opcode.addressMode == modeAbsoluteY {
// Double read, needed to pass A2Audit for the Language Card
value = resolveValue(s, line, opcode)
}
if inc { if inc {
value++ value++
} else { } else {