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SED: Difference between revisions
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'''SED''' is a 65x instruction that sets the [[decimal mode flag]] so that [[ADC]] and [[SBC]] will operate on [[binary coded decimal]] data properly. | '''SED''' is a 65x instruction that sets the [[decimal mode flag]] so that [[ADC]] and [[SBC]] will operate on [[binary coded decimal]] data properly. | ||
No other flags are affected. | |||
==== Syntax ==== | ==== Syntax ==== | ||
Revision as of 23:11, 8 August 2024
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | Speed | ||||
| Implied (type 2) | F8 | 1 byte | 2 cycles | ||||
| Flags Affected | ||||||||
|---|---|---|---|---|---|---|---|---|
| N | V | M | X | D | I | Z | C | |
| . | . | . | . | 1 | . | . | . | |
SED is a 65x instruction that sets the decimal mode flag so that ADC and SBC will operate on binary coded decimal data properly.
No other flags are affected.
Syntax
SED
See Also
External Links
- Eyes & Lichty, page 500 on SED
- Labiak, page 181 on SED
- 3.3.1 on MCS6500 Manual, page 26 on SED
- Carr, page 273 on SED
- Leventhal, page 3-94 on SED
- snes9x implementation of SED: https://github.com/snes9xgit/snes9x/blob/master/cpuops.cpp#L1434