We've just updated MediaWiki and its underlying software. If anything doesn't look or work quite right, please mention it to us. --RanAS

SEP: Difference between revisions

From SnesLab
Jump to: navigation, search
(→‎External Links: numbered refs)
(superscripted)
Line 49: Line 49:
'''SEP''' (Set Status Bits) is a [[65c816]] instruction that sets bits in the [[status register]] that correspond to set bits in the operand.
'''SEP''' (Set Status Bits) is a [[65c816]] instruction that sets bits in the [[status register]] that correspond to set bits in the operand.


SEP is the only way to set the m and x flags directly (but [[PLP]] and [[RTI]] may set them too.)
SEP is the only way to set the m and x flags directly (but [[PLP]] and [[RTI]] may set them too.)<sup>[1]</sup>


==== Syntax ====
==== Syntax ====
Line 63: Line 63:
* [[Derailment]]
* [[Derailment]]


=== External Links ===
=== References ===
# [[Eyes & Lichty]] page 502, on SEP: https://archive.org/details/0893037893ProgrammingThe65816/page/n528
# [[Eyes & Lichty]] page 502, on SEP: https://archive.org/details/0893037893ProgrammingThe65816/page/n528
# [[Labiak]] page 183 on SEP: https://archive.org/details/Programming_the_65816/page/n193
# [[Labiak]] page 183 on SEP: https://archive.org/details/Programming_the_65816/page/n193

Revision as of 03:45, 8 July 2024

Basic Info
Addressing Mode Opcode Length Speed
Immediate E2 2 bytes 3 cycles
Flags Affected
N V M X D I Z C
emulation mode . .
native mode

SEP (Set Status Bits) is a 65c816 instruction that sets bits in the status register that correspond to set bits in the operand.

SEP is the only way to set the m and x flags directly (but PLP and RTI may set them too.)[1]

Syntax

SEP #nvmxdizc

See Also

References

  1. Eyes & Lichty page 502, on SEP: https://archive.org/details/0893037893ProgrammingThe65816/page/n528
  2. Labiak page 183 on SEP: https://archive.org/details/Programming_the_65816/page/n193
  3. snes9x implementation of SEP: https://github.com/snes9xgit/snes9x/blob/master/cpuops.cpp#L3203
  4. undisbeliever on SEP: https://undisbeliever.net/snesdev/65816-opcodes.html#sep-set-status-bits