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Sign Flag
From SnesLab
The Sign Flag (S) exists on the Super FX. It is bit 11 of SFR. It is affected by the following instructions:
- ADC Rn
- ADC #n
- ADD Rn
- ADD #n
- AND Rn
- AND #n
- ASR
- BIC Rn
- BIC #n
- CMP Rn
- DEC Rn
- DIV2
- FMULT
- HIB
- INC Rn
- LMULT
- LOB
- LOOP
- LSR
- MERGE
- MOVES Rn, Rn'
- MULT Rn
- MULT #n
- NOT
- OR Rn
- OR #n
- ROL
- ROR
- RPIX
- SBC Rn
- SEX
- SUB Rn
- SUB #n
- SWAP
- UMULT Rn
It affects the behavior of the following instructions:
See Also
References
- 9.3 on page 2-9-2 of Book II of the official Super Nintendo development manual
- Table 2-4-2 on page 2-4-4, lbid.