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Routines |
| Prev: A7EB | Up: Map | Next: A82F |
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Used by the routine at A709.
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| A80E | PUSH DE | Stash DE on the stack. | ||
| A80F | CALL $A7D0 | Call A7D0. | ||
| A812 | POP DE | Restore DE from the stack. | ||
| A813 | LD A,$50 | A=50. | ||
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This entry point is used by the routine at D405.
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| A815 | PUSH AF | Stash AF on the stack. | ||
| A816 | LD A,D | A=D. | ||
| A817 | AND %00001111 | Keep only bits 0-3. | ||
| A819 | LD D,A | D=A. | ||
| A81A | POP AF | Restore AF from the stack. | ||
| A81B | OR D | Set the bits from D. | ||
| A81C | LD D,A | D=A. | ||
| A81D | AND %00001111 | Keep only bits 0-3. | ||
| A81F | OR E | Set the bits from E. | ||
| A820 | RET Z | Return if the result is zero. | ||
| A821 | CALL $A887 | Call A887. | ||
| A824 | LD A,($A7EA) | A=*A7EA. | ||
| A827 | PUSH HL | Stash HL on the stack. | ||
| A828 | LD HL,$A026 | HL=A026. | ||
| A82B | OR (HL) | Set the bits from *HL. | ||
| A82C | LD (HL),A | Write A to *HL. | ||
| A82D | POP HL | Restore HL from the stack. | ||
| A82E | RET | Return. | ||
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