Absolute Boolean Bit Addressing

Absolute Boolean Bit is used on the SPC700 by some three-byte instructions to address individual bits:

• AND1
• OR1
• EOR1
• MOV1
• NOT1

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

• Absolute Addressing
• Direct Page Bit Addressing

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.