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Absolute Boolean Bit Addressing: Difference between revisions
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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. | 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 ==== | |||
<pre> | |||
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 | |||
</pre> | |||
=== See Also === | === See Also === | ||
Revision as of 19:40, 12 July 2024
Absolute Boolean Bit is used on the SPC700 by some 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
Reference
- page 3-8-8 of Book I of the official Super Nintendo development manual
- Figure 3-8-3 on page 3-8-9, lbid.