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Routines |
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After the game has loaded, this is where it all starts.
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| 8400 | DI | Disable interrupts | ||
| 8401 | LD HL,$5BFF | Place the address of the routine at 869F on the stack | ||
| 8404 | LD (HL),$86 | |||
| 8406 | DEC HL | |||
| 8407 | LD (HL),$9F | |||
| 8409 | LD SP,$5BFE | |||
| 840C | SUB A | Set HL=8500 in a roundabout way | ||
| 840D | LD L,A | |||
| 840E | XOR $0A | |||
| 8410 | LD B,A | |||
| 8411 | INC B | |||
| 8412 | LD H,B | |||
| 8413 | RRC H | |||
| 8415 | LD C,(HL) | Read through addresses 8500-FFFF, without changing their contents; perhaps this code was once used to descramble the contents of pages 0x85-0xFF, but now all it does is introduce a pause of about 0.47s before displaying the code entry screen | ||
| 8416 | LD A,L | |||
| 8417 | XOR C | |||
| 8418 | XOR H | |||
| 8419 | LD (HL),C | |||
| 841A | INC HL | |||
| 841B | BIT 7,H | |||
| 841D | JR NZ,$8415 | |||
| 841F | RET | Make an indirect jump to 869F | ||
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