Difference between revisions of "RealQ16s:Provisional instruction listing/Opcode table/1 byte instructions"
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m (Corrected mov instruction) |
(Added two-bytes prefix instruction.) |
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| colspan="4" | 0010 | | colspan="4" | 0010 | ||
| colspan="4" | 1100 | | colspan="4" | 1100 | ||
| + | | {{Provisional opcode|16s|MOV b1,r1H}} | ||
| + | | colspan="4" | 0010 | ||
| + | | colspan="2" | 11 | ||
| + | | colspan="2" | r1 | ||
| + | | style="text-align:right" | x1024 (x4) | ||
| + | | '''''16 bit'' instruction''' <code>0010 11r1 vvvv vvvv</code> - move byte ''b1'' given by ''v'' into high byte of register ''r1'' | ||
| + | | | ||
| + | |- | ||
| + | | colspan="4" | 0011 | ||
| + | | colspan="4" | 0000 | ||
| + | | {{Provisional opcode|16s|MOVACO b1,r1L}} | ||
| + | | colspan="4" | 0011 | ||
| + | | colspan="2" | 00 | ||
| + | | colspan="2" | r1 | ||
| + | | style="text-align:right" | x1024 (x4) | ||
| + | | '''''16 bit'' instruction''' <code>0011 00r1 vvvv vvvv</code> - move byte ''b1'' given by ''v'' into low byte of register ''r1'', then clear high byte of register ''r1''. | ||
| + | | | ||
| + | |- | ||
| + | | colspan="4" | 0011 | ||
| + | | colspan="4" | 0100 | ||
| + | | | ||
| + | |- | ||
| + | | colspan="4" | 1111 | ||
| + | | colspan="4" | 1111 | ||
| + | | (two bytes prefix) | ||
| + | | colspan="4" | 1111 | ||
| + | | colspan="4" | 1111 | ||
| + | | style="text-align:right" | x256 (x1) | ||
| + | | '''''16 bit'' instruction''' <code>1111 1111 vvvv vvvv</code> - rare instruction that have two bytes have this as their first byte. | ||
| + | | | ||
| + | |- | ||
|} | |} | ||
Latest revision as of 22:44, 12 February 2016
| Range | Operation | bits | Distinct opcodes |
Comment | Caveats | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0000 | 0000 | NOP
|
0000 | 0000 | x1 | Does nothing | |||||||||||||
| 0000 | 0001 | (unused) | 0000 | 0001 | (x15 opcodes) | ||||||||||||||
| ... | ... | ... | |||||||||||||||||
| 0000 | 1111 | (Unused) | 0000 | 1111 | |||||||||||||||
| 0001 | 0000 | MOV r1,r2
|
0001 | r1 | r2 | x12 | Store r1 in r2, treating them both as 16 bit registers | r1 and r2 must be different | |||||||||||
| ... | (Unused) | 0001 | 0000 | x1 | |||||||||||||||
| (Unused) | 0001 | 0101 | x1 | ||||||||||||||||
| (Unused) | 0001 | 1010 | x1 | ||||||||||||||||
| 0001 | 1111 | (Unused) | 0001 | 1111 | x1 | ||||||||||||||
| 0010 | 0000 | PUSH r1
|
0010 | 00 | r1 | x4 | Push the 16 bit register r1 | ||||||||||||
| 0010 | 0100 | POP r1
|
0010 | 01 | r1 | x4 | Pop the 16 bit register r1 | ||||||||||||
| 0010 | 1000 | MOV b1,r1L
|
0010 | 10 | r1 | x1024 (x4) | 16 bit instruction 0010 10r1 vvvv vvvv - move byte b1 given by v into low byte of register r1
|
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| 0010 | 1100 | MOV b1,r1H
|
0010 | 11 | r1 | x1024 (x4) | 16 bit instruction 0010 11r1 vvvv vvvv - move byte b1 given by v into high byte of register r1
|
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| 0011 | 0000 | MOVACO b1,r1L
|
0011 | 00 | r1 | x1024 (x4) | 16 bit instruction 0011 00r1 vvvv vvvv - move byte b1 given by v into low byte of register r1, then clear high byte of register r1.
|
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| 0011 | 0100 | ||||||||||||||||||
| 1111 | 1111 | (two bytes prefix) | 1111 | 1111 | x256 (x1) | 16 bit instruction 1111 1111 vvvv vvvv - rare instruction that have two bytes have this as their first byte.
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