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JSR: Difference between revisions
From SnesLab
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* [[MCS6500 Manual]] page 106 on JSR: https://archive.org/details/mos_microcomputers_programming_manual/page/n125 | * [[MCS6500 Manual]] page 106 on JSR: https://archive.org/details/mos_microcomputers_programming_manual/page/n125 | ||
* [[Carr]], [https://archive.org/details/6502UsersManual/page/n275 page 262] on JSR | * [[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 | ||
* http://www.6502.org/tutorials/6502opcodes.html#JSR | * http://www.6502.org/tutorials/6502opcodes.html#JSR | ||
Revision as of 04:15, 8 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
- MCS6500 Manual page 106 on JSR: https://archive.org/details/mos_microcomputers_programming_manual/page/n125
- Carr, page 262 on JSR
- Leventhal, page 3-70 on JSR
- http://www.6502.org/tutorials/6502opcodes.html#JSR