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Absolute Boolean Bit Addressing
From SnesLab
Absolute Boolean Bit is used on the SPC700 by some three-byte instructions to address individual bits:
The bottom 13 bits of a 16-bit value specify an absolute address, while the top 3 bits specify which bit within the byte stored at that address. The greatest address these instructions can affect is 1FFFh.
Syntax
AND1 C, mem. bit AND1 C, /mem. bit OR1 C, mem. bit OR1 C, /mem. bit EOR1 C, mem. bit MOV1 C, mem. bit MOV1 mem. bit, C NOT1 mem. bit
See Also
References
- page 3-8-8 of Book I of the official Super Nintendo development manual
- Figure 3-8-3 Memory Access Addressing Effective Address on page 3-8-9, lbid.