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Routines |
| Prev: B197 | Up: Map | Next: B264 |
| B1A6 | LD A,(IY+$3C) | Is the character moving? (BCA3) | ||
| B1A9 | OR A | |||
| B1AA | JR NZ,$B1B2 | Move forward if they are. | ||
| B1AC | LD A,(IY+$41) | Copy the current direction (BCA8) to the movement flag. | ||
| B1AF | LD (IY+$3C),A | |||
| B1B2 | LD (IY+$46),A | Copy this to the jump flag. BCAD | ||
| B1B5 | LD (IY+$4B),$00 | Set the jump table index to 0. BCB2 | ||
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This entry point is used by the routines at A92C and B09F.
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| B1B9 | LD A,(IY+$3C) | Get the direction. | ||
| B1BC | CP $01 | Is the character facing right? | ||
| B1BE | JR Z,$B21C | Move to handle that if so. | ||
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Character is jumping left.
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| B1C0 | LD A,(IY+$4B) | Get the jump table index. | ||
| B1C3 | LD E,A | Multiply by 3 and store in DE. | ||
| B1C4 | ADD A,A | |||
| B1C5 | ADD A,E | |||
| B1C6 | LD E,A | |||
| B1C7 | LD D,$00 | |||
| B1C9 | LD HL,$B264 | Add the base address of the jump table (B264) to get an offset. | ||
| B1CC | ADD HL,DE | |||
| B1CD | LD E,(HL) | Put the X offset in E. | ||
| B1CE | INC HL | Put the Y offset in D. | ||
| B1CF | LD D,(HL) | |||
| B1D0 | INC HL | Put the graphic frame number in B. | ||
| B1D1 | LD B,(HL) | |||
| B1D2 | LD A,D | |||
| B1D3 | DEC A | |||
| B1D4 | BIT 7,A | |||
| B1D6 | JR NZ,$B1ED | |||
| B1D8 | LD A,(IY+$37) | |||
| B1DB | OR A | |||
| B1DC | JR NZ,$B1ED | |||
| B1DE | LD A,(IY+$0A) | |||
| B1E1 | AND $07 | |||
| B1E3 | JR NZ,$B1ED | |||
| B1E5 | LD (IY+$4B),$0B | |||
| B1E9 | LD B,$00 | |||
| B1EB | JR $B205 | |||
| B1ED | LD A,(IY-$3C) | |||
| B1F0 | OR A | |||
| B1F1 | CALL NZ,$81D4 | If not, need to change direction. | ||
| B1F4 | LD A,(IY+$0A) | |||
| B1F7 | ADD A,D | |||
| B1F8 | LD (IY+$0A),A | |||
| B1FB | LD A,(IY+$05) | Get the X co-ordinate. | ||
| B1FE | SUB E | |||
| B1FF | JR NC,$B202 | |||
| B201 | XOR A | |||
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Common exit point for jumping left and right.
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| B202 | LD (IY+$05),A | Set the current X co-ordinate (BC6C) to A. | ||
| B205 | LD (IY+$00),B | Set the current frame number (BC67) to B. | ||
| B208 | INC (IY+$4B) | Increment the jump table index. | ||
| B20B | LD A,(IY+$4B) | Have we reached the end of the table? | ||
| B20E | CP $0C | |||
| B210 | RET NZ | Return if not. | ||
| B211 | LD (IY+$3C),$00 | Set flags as "not jumping" | ||
| B215 | LD (IY+$46),$00 | |||
| B219 | JP $E315 | Play a landing footstep sound and return. | ||
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Character is jumping right.
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| B21C | LD A,(IY+$4B) | Get the jump frame number. | ||
| B21F | LD E,A | Multiply by 3 and store in DE. | ||
| B220 | ADD A,A | |||
| B221 | ADD A,E | |||
| B222 | LD E,A | |||
| B223 | LD D,$00 | |||
| B225 | LD HL,$B264 | Add the base address of the jump table (B264) to get an offset. | ||
| B228 | ADD HL,DE | |||
| B229 | LD E,(HL) | Put the X offset in E. | ||
| B22A | INC HL | Put the Y offset in D. | ||
| B22B | LD D,(HL) | |||
| B22C | INC HL | Put the graphic frame number in B. | ||
| B22D | LD B,(HL) | |||
| B22E | LD A,D | |||
| B22F | DEC A | |||
| B230 | BIT 7,A | |||
| B232 | JR NZ,$B249 | |||
| B234 | LD A,(IY+$37) | |||
| B237 | OR A | |||
| B238 | JR NZ,$B249 | |||
| B23A | LD A,(IY+$0A) | |||
| B23D | AND $07 | |||
| B23F | JR NZ,$B249 | |||
| B241 | LD (IY+$4B),$0B | |||
| B245 | LD B,$00 | Set the frame number to 0. | ||
| B247 | JR $B205 | Jump back to update the sequence. | ||
| B249 | LD A,(IY-$3C) | |||
| B24C | OR A | |||
| B24D | CALL Z,$81D4 | If so, need to change direction. | ||
| B250 | LD A,(IY+$0A) | |||
| B253 | ADD A,D | |||
| B254 | LD (IY+$0A),A | |||
| B257 | LD A,(IY+$05) | Get the X co-ordinate. | ||
| B25A | ADD A,E | |||
| B25B | CP $F0 | |||
| B25D | JR C,$B202 | |||
| B25F | LD A,$F0 | |||
| B261 | JP $B202 | Jump back and continue. | ||
| Prev: B197 | Up: Map | Next: B264 |