NEG
0 - A| 1 | 1 | 1 | 0 | 1 | 1 | 0 | 1 |
| 0 | 1 | 0 | 0 | 0 | 1 | 0 | 0 |
C will set if A was 0 before the instruction. P will set if A was 80H.
NEG
OBJECT CODE
NEG |
Negate accumulator. | |||||||||
| Function: | A
0 - A |
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| Format: |
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byte 1: ED |
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byte 2: 44 |
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| Description: | The contents of the accumulator are subtracted from zero (two's complement) and the result is stored back in the accumulator. |
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| Data Flow: | ||||||||||
| Timing: | 2 M cycles; 8 T states: 4 usec @ 2 MHz |
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| Addressing Mode: | implicit |
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| Flags: | C will set if A was 0 before the instruction. P will set if A was 80H. |
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| Example: | NEG |
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OBJECT CODE |
Before: |
After: |
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