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Routines |
| Prev: C1AC | Up: Map | Next: C279 |
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Does nothing unless the flag at F5F7 is set, which happens when item number 09 has been picked up. Once the ship is at the bottom of zone 0B, the item is delivered: it is no longer carried, and two pieces are made with CreatePiece in the last two slots of the map objects. Either way, carries on to draw the two pieces that are held at PieceVariables_FirstSprite and PieceVariables_SecondSprite and to set their attributes. This is a best reading of the code.
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| CheckItemDelivery | C1CE | LD A,($F5F7) | The flag set when item 09 has been picked up. | |
| C1D1 | AND A | Return if A is zero. | ||
| C1D2 | RET Z | |||
| C1D3 | LD A,($C8E9) | The ship's map zone. | ||
| C1D6 | CP $0B | Jump to CheckItemDelivery_Pieces if A is not 0B. | ||
| C1D8 | JP NZ,CheckItemDelivery_Pieces | |||
| C1DB | LD A,($C8EA) | The ship's vertical position. | ||
| C1DE | CP $A7 | Jump to CheckItemDelivery_Pieces if A is less than A7. | ||
| C1E0 | JP C,CheckItemDelivery_Pieces | |||
| C1E3 | LD A,($C279) | The facing kept for the pieces. | ||
| C1E6 | OR %01000000 | Set the bits of A that are set in 40. | ||
| C1E8 | LD ($C279),A | A piece is being delivered. | ||
| C1EB | XOR A | Clear A. | ||
| C1EC | LD ($F5F7),A | Update the flag set when item 09 has been picked up. | ||
| C1EF | LD ($C904),A | Update the item the ship is about to pick up. | ||
| C1F2 | LD A,($C8E9) | The ship's map zone. | ||
| C1F5 | LD D,A | D=A. | ||
| C1F6 | LD A,($C8E6) | The ship's map column. | ||
| C1F9 | LD E,A | E=A. | ||
| C1FA | LD ($F628),DE | The tenth item site. | ||
| C1FE | LD ($F62C),DE | The eleventh item site. | ||
| C202 | LD A,($5C38) | The ship row. | ||
| C205 | SUB $0D | Subtract 0D from A. | ||
| C207 | LD B,A | B=A. | ||
| C208 | LD A,($C903) | The row the ship was drawn on. | ||
| C20B | SUB B | Subtract B from A. | ||
| C20C | LD B,A | B=A. | ||
| C20D | LD A,($C8EA) | The ship's vertical position. | ||
| C210 | SUB B | Subtract B from A. | ||
| C211 | LD H,A | H=A. | ||
| C212 | LD A,($C8E7) | The ship's horizontal position. | ||
| C215 | ADD A,$08 | Add 08 to A. | ||
| C217 | AND %11111000 | Keep the bits of A that are set in F8. | ||
| C219 | LD L,A | L=A. | ||
| C21A | LD ($F62A),HL | The position of the tenth item site. | ||
| C21D | LD A,L | A=L. | ||
| C21E | ADD A,$10 | Add 10 to A. | ||
| C220 | LD L,A | L=A. | ||
| C221 | LD A,H | A=H. | ||
| C222 | SUB $23 | Subtract 23 from A. | ||
| C224 | LD H,A | H=A. | ||
| C225 | LD ($F62E),HL | The position of the eleventh item site. | ||
| C228 | LD HL,$F628 | The tenth item site. | ||
| C22B | LD IX,$A873 | The fifth map-object slot. | ||
| C22F | LD B,$09 | B=09. | ||
| C231 | CALL CreatePiece | Call CreatePiece. | ||
| C234 | LD IX,$A88D | The sixth map-object slot. | ||
| C238 | LD HL,$F62C | The eleventh item site. | ||
| C23B | LD B,$0A | B=0A. | ||
| C23D | CALL CreatePiece | Call CreatePiece. | ||
| CheckItemDelivery_Pieces | C240 | LD IX,$C27B | The first piece beside the ship. | |
| C244 | LD DE,$7438 | The picture of type 0C frame 09. | ||
| C247 | LD HL,$0505 | HL=0505. | ||
| C24A | LD ($5C28),HL | The first piece is five bytes wide. | ||
| C24D | LD HL,$2300 | HL=2300. | ||
| C250 | LD ($5C1C),HL | No rows saved, and the piece is 23 pixels high. | ||
| C253 | CALL DrawPiece | Call DrawPiece. | ||
| C256 | LD IX,$C27D | The second piece beside the ship. | ||
| C25A | LD DE,$74E9 | The picture of type 0C frame 0A. | ||
| C25D | LD HL,$0303 | HL=0303. | ||
| C260 | LD ($5C28),HL | The second piece is three bytes wide. | ||
| C263 | LD HL,$2F00 | HL=2F00. | ||
| C266 | LD ($5C1C),HL | No rows saved, and the piece is 2F pixels high. | ||
| C269 | CALL DrawPiece | Call DrawPiece. | ||
| C26C | LD A,($C8FD) | The ship's facing. | ||
| C26F | LD ($C279),A | The facing the pieces were drawn with. | ||
| C272 | XOR A | Clear A. | ||
| C273 | LD ($C27A),A | No piece has been drawn yet. | ||
| C276 | JP SetPairAttributes | Jump to SetPairAttributes. | ||
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