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JSR: Difference between revisions
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!colspan="9"|Flags Affected | !colspan="9"|Flags Affected | ||
|+ | |+ | ||
|N | |[[Negative Flag|N]] | ||
|V | |[[Overflow Flag|V]] | ||
|M | |[[M Flag|M]] | ||
|X | |[[X Flag|X]] | ||
|D | |[[Decimal Flag|D]] | ||
|I | |[[I Flag|I]] | ||
|Z | |[[Zero Flag|Z]] | ||
|C | |[[Carry Flag|C]] | ||
|+ | |+ | ||
|. | |. | ||
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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. | ||
==== Execution Sequence ==== | |||
* The [[return address]] is pushed onto the stack | |||
* Control is transferred to the target location | |||
=== See Also === | === See Also === | ||
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=== External Links === | === External Links === | ||
* [[Eyes & Lichty]] page 461, on JSR: https://archive.org/details/0893037893ProgrammingThe65816/page/n487 | * [[Eyes & Lichty]] page 461, on JSR: https://archive.org/details/0893037893ProgrammingThe65816/page/n487 | ||
* [[Labiak]] page on JSR: https://archive.org/details/Programming_the_65816/page/n158 | * [[Labiak]] page 148 on JSR: https://archive.org/details/Programming_the_65816/page/n158 | ||
* [[MCS6500 Manual]] page 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]] page on JSR: https://archive.org/details/6502UsersManual/page/n275 | * [[Carr]] page 262 on JSR: https://archive.org/details/6502UsersManual/page/n275 | ||
* [[Leventhal]] page on JSR: https://archive.org/details/6502-assembly-language-programming/page/n119 | * [[Leventhal]] page 3-70 on JSR: https://archive.org/details/6502-assembly-language-programming/page/n119 | ||
[[Category:ASM]] | [[Category:ASM]] | ||
[[Category:Inherited from 6502]] | [[Category:Inherited from 6502]] | ||
[[Category:Unconditional Branches]] | [[Category:Unconditional Branches]] | ||
Latest revision as of 10:04, 18 December 2023
| 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.
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/n487
- 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