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Half-Carry Flag: Difference between revisions
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The '''Half-carry flag''' (H) exists on the [[SPC700]], as bit 3 of the [[Program Status Word]]. It applies to the bottom 4 bits of the accumulator. | The '''Half-carry flag''' (H) exists on the [[SPC700]], as bit 3 of the [[Program Status Word]]. It applies to the bottom 4 bits of the accumulator, meaning it is set whenever bit 3 of an [[ALU]] operation carries over into bit 4. | ||
It is cleared by [[CLRV]], but there is no [[SETV]] command to set it. | |||
[[Category:ASM]] | [[Category:ASM]] | ||
Revision as of 00:46, 12 May 2023
The Half-carry flag (H) exists on the SPC700, as bit 3 of the Program Status Word. It applies to the bottom 4 bits of the accumulator, meaning it is set whenever bit 3 of an ALU operation carries over into bit 4.
It is cleared by CLRV, but there is no SETV command to set it.