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JSR
From SnesLab
| 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: https://archive.org/details/0893037893ProgrammingThe65816/page/461
- Labiak page 148 on JSR: https://archive.org/details/Programming_the_65816/page/n158
- MCS6500 Manual page 106 on JSR: https://archive.org/details/mos_microcomputers_programming_manual/page/n125
- Carr page 262 on JSR: https://archive.org/details/6502UsersManual/page/n275
- Leventhal page 3-70 on JSR: https://archive.org/details/6502-assembly-language-programming/page/n119