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Negative Flag: Difference between revisions
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The '''Negative Flag''' exists on the [[65c816]]. | The '''Negative Flag''' exists on the [[65c816]]. | ||
[[LSR]] always clears the negative flag. | These instructions affect the negative flag (this bulleted list being 37 long): | ||
* [[ADC]] | |||
* [[AND]] | |||
* [[ASL]] | |||
* [[BIT]] | |||
* [[CMP]] | |||
* [[CPX]] | |||
* [[CPY]] | |||
* [[DEC]] | |||
* [[DEX]] | |||
* [[DEY]] | |||
* [[EOR]] | |||
* [[INC]] | |||
* [[INX]] | |||
* [[INY]] | |||
* [[LDA]] | |||
* [[LDX]] | |||
* [[LDY]] | |||
* [[ORA]] | |||
* [[PLA]] | |||
* [[PLB]] | |||
* [[PLD]] | |||
* [[PLX]] | |||
* [[PLY]] | |||
* [[ROL]] | |||
* [[ROR]] | |||
* [[SBC]] | |||
* [[TAX]] | |||
* [[TAY]] | |||
* [[TCD]] | |||
* [[TDC]] | |||
* [[TSC]] | |||
* [[TSX]] | |||
* [[TXA]] | |||
* [[TXY]] | |||
* [[TYA]] | |||
* [[TYX]] | |||
* [[XBA]] | |||
Also, [[LSR]] always clears the negative flag. | |||
=== Reference === | === Reference === | ||
* Labiak, https://archive.org/details/Programming_the_65816/page/n119 | * Labiak, Willam. Page 109: https://archive.org/details/Programming_the_65816/page/n119 | ||
[[Category:ASM]] | [[Category:ASM]] | ||
[[Category:Flags]] | [[Category:Flags]] | ||
[[Category:Inherited from 6502]] | [[Category:Inherited from 6502]] | ||
Latest revision as of 08:35, 7 December 2023
The Negative Flag exists on the 65c816.
These instructions affect the negative flag (this bulleted list being 37 long):
- ADC
- AND
- ASL
- BIT
- CMP
- CPX
- CPY
- DEC
- DEX
- DEY
- EOR
- INC
- INX
- INY
- LDA
- LDX
- LDY
- ORA
- PLA
- PLB
- PLD
- PLX
- PLY
- ROL
- ROR
- SBC
- TAX
- TAY
- TCD
- TDC
- TSC
- TSX
- TXA
- TXY
- TYA
- TYX
- XBA
Also, LSR always clears the negative flag.
Reference
- Labiak, Willam. Page 109: https://archive.org/details/Programming_the_65816/page/n119