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SED: Difference between revisions
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'''SED''' is a 65x instruction that sets the [[decimal mode flag]]. | '''SED''' is a 65x instruction that sets the [[decimal mode flag]] so that [[ADC]] and [[SBC]] will operate on [[binary coded decimal]] data properly. | ||
==== Syntax ==== | ==== Syntax ==== | ||
Revision as of 23:03, 6 July 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.
Syntax
SED
See Also
External Links
- Eyes & Lichty page 500, on SED: https://archive.org/details/0893037893ProgrammingThe65816/page/n526
- Labiak page 181 on SED: https://archive.org/details/Programming_the_65816/page/n191
- MCS6500 Manual page 26 on SED: https://archive.org/details/mos_microcomputers_programming_manual/page/n41
- Carr page 273 on SED: https://archive.org/details/6502UsersManual/page/n286
- Leventhal page 3-94 on SED: https://archive.org/details/6502-assembly-language-programming/page/n143
- snes9x implementation of SED: https://github.com/snes9xgit/snes9x/blob/master/cpuops.cpp#L1434