GB Programming: Difference between revisions
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>ISSOtm m (→Chaining conditionals: Fixed a mistake.) |
>ISSOtm (→Instructions get!: Remove instructions that don't exist on the Game Boy) |
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!Syntax |
!Syntax |
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!Effect |
!Effect |
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!S |
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!Z |
!Z |
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!P/V |
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!C |
!C |
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|Adds one to the operand ("increments" it) |
|Adds one to the operand ("increments" it) |
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|Affected, except for reg16 |
|Affected, except for reg16 |
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|Affected, except for reg16 |
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|Detects overflow, except for reg16 |
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|Not affected |
|Not affected |
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|Subtracts one to the operand ("decrements" it) |
|Subtracts one to the operand ("decrements" it) |
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|Affected, except for reg16 |
|Affected, except for reg16 |
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|Affected, except for reg16 |
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|Detects overflow, except for reg16 |
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|Not affected |
|Not affected |
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|- |
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|ADD A, <nowiki>{reg8 | imm8 |
|ADD A, <nowiki>{reg8 | imm8 | (hl)}</nowiki> |
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|Adds the operand to the accumulator |
|Adds the operand to the accumulator |
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|Affected |
|Affected |
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|Affected |
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|Detects overflow |
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|Not affected |
|Not affected |
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|Adds the operand to HL |
|Adds the operand to HL |
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|Affected |
|Affected |
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|Affected |
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|Detects overflow |
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|Not affected |
|Not affected |
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|SUB <nowiki>{reg8 | imm8 |
|SUB <nowiki>{reg8 | imm8 | (hl)}</nowiki> |
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|Subtracts the operand from the accumulator. The syntax SUB A, <nowiki>{...}</nowiki> is also valid but less common. |
|Subtracts the operand from the accumulator. The syntax SUB A, <nowiki>{...}</nowiki> is also valid but less common. |
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|Affected |
|Affected |
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|Affected |
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|Detects overflow |
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|Not affected |
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|SBC HL, reg16 |
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|Subtracts the operand plus the carry flag from HL |
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|Affected |
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|Affected |
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|Detects overflow |
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|Not affected |
|Not affected |
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