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Routines |
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Used by the routine at 64836.
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| 47989 | LD HL,1222 | Load HL with bytecodes for instruction ADD A,4 | ||
| 47992 | LD DE,0 | Load D with 0 and E with 0 | ||
| 47995 | CALL 48018 | Load A with current border colour | ||
| 47998 | LD (48010),HL | Set instruction at 48010 to ADD A,4 (opcodes in HL) | ||
| 48001 | OUT (254),A | Set current border colour and reset speaker state | ||
| 48003 | XOR 16 | Flip "speaker" bit | ||
| 48005 | LD B,E | Copy E into B | ||
| 48006 | DJNZ 48006 | Delay for period determined by B | ||
| 48008 | EX AF,AF' | Switch AF and AF' | ||
| 48009 | LD A,E | Copy E into A | ||
| 48010 | XOR 128 | Change E (delay constant)... | ||
| 48012 | LD E,A | ... | ||
| 48013 | EX AF,AF' | Switch AF and AF' again | ||
| 48014 | DEC D | Decrease D (initially zero)... | ||
| 48015 | JR NZ,48001 | ...and repeat loop (256 times) | ||
| 48017 | RET | Return | ||
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