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Implements proper test for ADC/SBC 65C02 NZ, though not yet the proper timing.
This gets Klaus Dorman's test to pass.
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@ -70,6 +70,8 @@ class KlausDormannTests: XCTestCase {
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func test65C02() {
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func errorForTrapAddress(_ address: UInt16) -> String? {
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switch address {
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case 0x24f1: return nil // success!
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case 0x0423: return "PHX: value of X not on stack page"
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case 0x0428: return "PHX: stack pointer not decremented"
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case 0x042d: return "PLY: didn't acquire value 0xaa from stack"
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@ -285,6 +285,10 @@ if(number_of_cycles <= Cycles(0)) break;
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carry_flag_ = (temp16 > 0xff) ? 0 : Flag::Carry;
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a_ = static_cast<uint8_t>(temp16);
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if(personality_ != P6502) {
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negative_result_ = zero_result_ = a_;
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}
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continue;
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} else {
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operand_ = ~operand_;
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@ -305,6 +309,10 @@ if(number_of_cycles <= Cycles(0)) break;
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carry_flag_ = (result >> 8) ? 1 : 0;
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a_ = static_cast<uint8_t>(result);
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zero_result_ = static_cast<uint8_t>(decimalResult);
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if(personality_ != P6502) {
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negative_result_ = zero_result_ = a_;
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}
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} else {
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const uint16_t result = static_cast<uint16_t>(a_) + static_cast<uint16_t>(operand_) + static_cast<uint16_t>(carry_flag_);
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overflow_flag_ = (( (result^a_)&(result^operand_) )&0x80) >> 1;
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