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BIT fix

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folkert van heusden 2022-03-24 16:35:31 +01:00
parent 85327f0d6b
commit b9ec3ec77f
1 changed files with 1 additions and 1 deletions
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2
cpu.cpp
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@ -376,7 +376,7 @@ bool cpu::double_operand_instructions(const uint16_t instr)
case 0b011: { // BIT/BITB Bit Test Word/Byte case 0b011: { // BIT/BITB Bit Test Word/Byte
uint16_t src_value = getGAM(src_mode, src_reg, word_mode, false); uint16_t src_value = getGAM(src_mode, src_reg, word_mode, false);
uint16_t dst_value = getGAM(dst_mode, dst_reg, word_mode, false); uint16_t dst_value = getGAM(dst_mode, dst_reg, word_mode, false);
uint16_t result = dst_value & src_value; uint16_t result = (dst_value & src_value) & (word_mode ? 0xff : 0xffff);
setPSW_n(SIGN(result, word_mode)); setPSW_n(SIGN(result, word_mode));
setPSW_z(result == 0); setPSW_z(result == 0);