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JSR: Difference between revisions
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'''JSR''' (Jump to Subroutine) is a 65x instruction that transfers control to a subroutine. | '''JSR''' (Jump to Subroutine) is a 65x instruction that transfers control to a subroutine. | ||
No flags are affected. | |||
==== Syntax ==== | |||
<pre> | |||
JSR addr | |||
JSR (addr, X) | |||
JSR long | |||
</pre> | |||
==== Execution Sequence ==== | |||
* The [[return address]] is pushed onto the stack | |||
* Control is transferred to the target location | |||
=== See Also === | === See Also === | ||
* [[JSL]] | * [[JSL]] | ||
* [[RTS]] | * [[RTS]] | ||
* [[RTL]] | |||
=== External Links === | === External Links === | ||
* [[Eyes & Lichty]] | * [[Eyes & Lichty]], [https://archive.org/details/0893037893ProgrammingThe65816/page/461 page 461] on JSR | ||
* [[Labiak]] | * [[Labiak]], [https://archive.org/details/Programming_the_65816/page/n158 page 148] on JSR | ||
* [[MCS6500 Manual]] | * 8.1 on [[MCS6500 Manual]], [https://archive.org/details/mos_microcomputers_programming_manual/page/n125 page 106] on JSR | ||
* [[Carr]] | * [[Carr]], [https://archive.org/details/6502UsersManual/page/n275 page 262] on JSR | ||
* [[Leventhal]] | * [[Leventhal]], [https://archive.org/details/6502-assembly-language-programming/page/n119 page 3-70] on JSR | ||
* Pickens, John. http://www.6502.org/tutorials/6502opcodes.html#JSR | |||
[[Category:ASM]] | [[Category:ASM]] | ||
[[Category:Inherited from 6502]] | [[Category:Inherited from 6502]] | ||
[[Category:Unconditional Branches]] | [[Category:Unconditional Branches]] | ||
Latest revision as of 00:55, 10 August 2024
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | Speed | ||||
| Absolute | 20 | 3 bytes | 6 cycles | ||||
| Absolute Indexed Indirect | FC | 3 bytes | 8 cycles | ||||
| Absolute Long | 22 | 4 bytes | 8 cycles | ||||
| Flags Affected | ||||||||
|---|---|---|---|---|---|---|---|---|
| N | V | M | X | D | I | Z | C | |
| . | . | . | . | . | . | . | . | |
JSR (Jump to Subroutine) is a 65x instruction that transfers control to a subroutine.
No flags are affected.
Syntax
JSR addr JSR (addr, X) JSR long
Execution Sequence
- The return address is pushed onto the stack
- Control is transferred to the target location
See Also
External Links
- Eyes & Lichty, page 461 on JSR
- Labiak, page 148 on JSR
- 8.1 on MCS6500 Manual, page 106 on JSR
- Carr, page 262 on JSR
- Leventhal, page 3-70 on JSR
- Pickens, John. http://www.6502.org/tutorials/6502opcodes.html#JSR