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back2root:ibm-pc-ms-dos:instr:clx-stx
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Ci-dessous, les différences entre deux révisions de la page.
| Les deux révisions précédentesRévision précédenteProchaine révision | Révision précédenteProchaine révisionLes deux révisions suivantes | ||
| back2root:ibm-pc-ms-dos:asm:instr:clx-stx [2023/01/05 23:23] – [STC - Set Carry Flag] frater | back2root:ibm-pc-ms-dos:instr:clx-stx [2023/02/24 14:16] – supprimée - modification externe (Unknown date) 127.0.0.1 | ||
|---|---|---|---|
| Ligne 1: | Ligne 1: | ||
| - | ====== Instruction Clear / Set Flag ====== | ||
| - | ===== Carry Flag ===== | ||
| - | |||
| - | ==== CLC - Clear Carry Flag ==== | ||
| - | |||
| - | Clears the Carry Flag. | ||
| - | |||
| - | **Usage:** | ||
| - | |||
| - | <code asm> | ||
| - | CLC | ||
| - | </ | ||
| - | |||
| - | **Modifies flags: | ||
| - | |||
| - | <WRAP round box> | ||
| - | CF | ||
| - | </ | ||
| - | |||
| - | ^ ^ | ||
| - | ^ Operands | ||
| - | | none | 2 | 2 | 2 | 2 | 1 | | ||
| - | |||
| - | |||
| - | ==== STC - Set Carry Flag ==== | ||
| - | |||
| - | Sets the Carry Flag to 1. | ||
| - | |||
| - | **Usage:** | ||
| - | |||
| - | <code asm> | ||
| - | STC | ||
| - | </ | ||
| - | |||
| - | **Modifies flags:** | ||
| - | |||
| - | <WRAP round box> | ||
| - | CF | ||
| - | </ | ||
| - | |||
| - | ^ ^ | ||
| - | ^ Operands | ||
| - | | none | 2 | 2 | 2 | 2 | 1 | | ||
| - | |||
| - | |||
| - | ===== Direction Flag ===== | ||
| - | |||
| - | ==== CLD - Clear Direction Flag ==== | ||
| - | |||
| - | Clears the Direction Flag causing string instructions to increment the SI and DI index registers. | ||
| - | |||
| - | **Usage:** | ||
| - | |||
| - | <code asm> | ||
| - | CLD | ||
| - | </ | ||
| - | |||
| - | **Modifies flags: | ||
| - | <WRAP round box> | ||
| - | DF | ||
| - | </ | ||
| - | |||
| - | ^ ^ | ||
| - | ^ Operands | ||
| - | | none | 2 | 2 | 2 | 2 | 1 | | ||
| - | |||
| - | |||
| - | ==== STD - Set Direction Flag ==== | ||
| - | |||
| - | Sets the Direction Flag to 1 causing string instructions to auto-decrement SI and DI instead of auto-increment. | ||
| - | |||
| - | **Usage:** | ||
| - | |||
| - | <code asm> | ||
| - | STD | ||
| - | </ | ||
| - | |||
| - | **Modifies flags:** | ||
| - | <WRAP round box> | ||
| - | DF | ||
| - | </ | ||
| - | |||
| - | ^ ^ | ||
| - | ^ Operands | ||
| - | | none | 2 | 2 | 2 | 2 | 1 | | ||
| - | |||
| - | ===== Interruption Flag ===== | ||
| - | |||
| - | ==== CLI - Clear Interrupt Flag ==== | ||
| - | |||
| - | Disables the maskable hardware interrupts by clearing the Interrupt flag. | ||
| - | |||
| - | <WRAP round box> | ||
| - | NMI's and software interrupts are not inhibited. | ||
| - | </ | ||
| - | |||
| - | **Usage:** | ||
| - | |||
| - | <code asm> | ||
| - | CLI | ||
| - | </ | ||
| - | |||
| - | **Modifies flags: | ||
| - | <WRAP round box> | ||
| - | IF | ||
| - | </ | ||
| - | |||
| - | |||
| - | |||
| - | ^ ^ | ||
| - | ^ Operands | ||
| - | | none | 2 | 2 | 2 | 2 | 1 | | ||
| - | |||
| - | |||
| - | ==== STI - Set Carry Flag ==== | ||
| - | |||
| - | Sets the Interrupt Flag to 1, enabling recognition of all CPU hardware interrupts. | ||
| - | |||
| - | **Usage:** | ||
| - | |||
| - | <code asm> | ||
| - | STI | ||
| - | </ | ||
| - | |||
| - | **Modifies flags:** | ||
| - | <WRAP round box> | ||
| - | IF | ||
| - | </ | ||
| - | |||
| - | ^ ^ | ||
| - | ^ Operands | ||
| - | | none | 2 | 2 | 2 | 2 | 1 | | ||
| - | |||
| - | |||
| - | {{page> | ||
back2root/ibm-pc-ms-dos/instr/clx-stx.txt · Dernière modification : 2023/03/03 23:53 de 127.0.0.1
Sauf mention contraire, le contenu de ce wiki est placé sous les termes de la licence suivante : CC Attribution-Noncommercial-Share Alike 4.0 International
