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MOV1 (SPC700): Difference between revisions
From SnesLab
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|'''Speed''' | |'''Speed''' | ||
|+ | |+ | ||
| | |[[Absolute Boolean Bit]] | ||
|AA | |AA | ||
|3 bytes | |3 bytes | ||
|4 cycles | |4 cycles | ||
|+ | |+ | ||
| | |[[Absolute Boolean Bit]] | ||
|CA | |CA | ||
|3 bytes | |3 bytes | ||
| Line 22: | Line 22: | ||
|+ | |+ | ||
|Direction | |Direction | ||
|N | |[[Negative Flag|N]] | ||
|V | |[[Overflow Flag|V]] | ||
|P | |[[Direct Page Flag|P]] | ||
|B | |[[Break Flag|B]] | ||
|H | |[[Half-Carry Flag|H]] | ||
|I | |[[Interrupt Enable Flag|I]] | ||
|Z | |[[Zero Flag|Z]] | ||
|C | |[[Carry Flag|C]] | ||
|+ | |+ | ||
|to carry | |to carry | ||
| Line 39: | Line 39: | ||
|. | |. | ||
|. | |. | ||
| | |C | ||
|+ | |+ | ||
|from carry | |from carry | ||
| Line 52: | Line 52: | ||
|} | |} | ||
'''MOV1''' is an [[SPC700]] command that moves a memory bit to or from the [[carry flag]]. The low 13 bits of the operand specify an absolute address. The high 3 bits of the operand specify which bit at that absolute address. | '''MOV1''' is an [[SPC700]] command that moves a memory bit to or from the [[carry flag]]. The low 13 bits of the operand byte specify an absolute address. The high 3 bits of the operand byte specify which bit at that absolute address. | ||
The operands are stored in the instruction stream in the opposite order they appear in the assembler source. In the assembler source, the operand on the right is the source and the operand on the left is the destination. | |||
No flags are affected except when moving to the carry flag. | |||
==== Syntax ==== | |||
<pre> | |||
MOV1 C, mem. bit | |||
MOV1 mem. bit, C | |||
</pre> | |||
=== See Also === | === See Also === | ||
* [[MOVW]] | * [[MOVW]] | ||
* [[MOV]] | * [[MOV]] | ||
* [[AND1]] | |||
* [[OR1]] | |||
* [[EOR1]] | |||
* [[NOT1]] | |||
=== External Links === | === External Links === | ||
* Official Super Nintendo development manual on MOV1: [https://archive.org/details/SNESDevManual/book1/page/n234 Appendix C-9 of Book I] | * Official Super Nintendo development manual on MOV1: Table C-18 in [https://archive.org/details/SNESDevManual/book1/page/n234 Appendix C-9 of Book I] | ||
* subparagraph 8.2.3.3 of [https://archive.org/details/SNESDevManual/book1/page/n186 page 3-8-8], lbid. | |||
* anomie: https://github.com/yupferris/TasmShiz/blob/master/spc700.txt#L504 | |||
[[Category:ASM]] | [[Category:ASM]] | ||
[[Category:SPC700]] | [[Category:SPC700]] | ||
[[Category:Bit Operation Commands]] | [[Category:Bit Operation Commands]] | ||
[[Category:Three-byte Instructions]] | |||
Latest revision as of 14:03, 30 July 2024
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | Speed | ||||
| Absolute Boolean Bit | AA | 3 bytes | 4 cycles | ||||
| Absolute Boolean Bit | CA | 3 bytes | 6 cycles | ||||
| Flags Affected | ||||||||
|---|---|---|---|---|---|---|---|---|
| Direction | N | V | P | B | H | I | Z | C |
| to carry | . | . | . | . | . | . | . | C |
| from carry | . | . | . | . | . | . | . | . |
MOV1 is an SPC700 command that moves a memory bit to or from the carry flag. The low 13 bits of the operand byte specify an absolute address. The high 3 bits of the operand byte specify which bit at that absolute address.
The operands are stored in the instruction stream in the opposite order they appear in the assembler source. In the assembler source, the operand on the right is the source and the operand on the left is the destination.
No flags are affected except when moving to the carry flag.
Syntax
MOV1 C, mem. bit MOV1 mem. bit, C
See Also
External Links
- Official Super Nintendo development manual on MOV1: Table C-18 in Appendix C-9 of Book I
- subparagraph 8.2.3.3 of page 3-8-8, lbid.
- anomie: https://github.com/yupferris/TasmShiz/blob/master/spc700.txt#L504