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Routines |
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Used by the routine at 38841.
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| 39047 | LD A,(23452) | If drawing-layout-data-fragment flag is zero (reset)... | ||
| 39050 | OR A | ... | ||
| 39051 | JR Z,39063 | ...then skip ahead to 39063 | ||
| 39053 | XOR A | Set drawing-layout-data-fragment flag to zero (reset)... | ||
| 39054 | LD (23452),A | ... | ||
| 39057 | LD HL,(23453) | Load HL with previously stored position in room layout data | ||
| 39060 | JP 38977 | Loop back to 38977 for next byte of room layout data | ||
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The operand of the instruction at 39063 represents the address of start of room layout data for the current room. This is modified by the instruction at 38974.
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| 39063 | LD IX,0 | Load IX with start address of room layout data for current room | ||
| 39067 | LD A,(IX+0) | Load first byte of room layout data instruction | ||
| 39070 | OR A | If this byte is zero (i.e. last entry so no more painting to do)... | ||
| 39071 | JP Z,39393 | ...then finalise room drawing, draw objects and characters, and animate the arrival of any new characters, then return | ||
| 39074 | CP 127 | If this byte is 127 (i.e. horizontal block drawing)... | ||
| 39076 | JP Z,39216 | ...then draw run of 2 × 2 blocks horizontally | ||
| 39079 | CP 126 | If this byte is 126 (i.e. vertical block drawing)... | ||
| 39081 | JP Z,39291 | ...then draw run of 2 × 2 blocks vertically | ||
| 39084 | BIT 7,A | If bit 7 (draw-layout-data-fragment flag) is set... | ||
| 39086 | JP NZ,39189 | ...then jump to 39189 (start painting attribute / terrain interaction data for layout data fragment) | ||
| 39089 | INC IX | Advance to RLE attribute data index and load into L... | ||
| 39091 | LD L,(IX+0) | ... | ||
| 39094 | INC IX | Advance to RLE terrain interaction data index and load into E... | ||
| 39096 | LD E,(IX+0) | ... | ||
| 39099 | INC IX | Advance to x-coordinate... | ||
| 39101 | LD A,(IX+0) | ... | ||
| 39104 | LD (23408),A | ...and store at 23408 | ||
| 39107 | INC IX | Advance to y-coordinate... | ||
| 39109 | LD A,(IX+0) | ... | ||
| 39112 | LD (23409),A | ...and store at 23409 | ||
| 39115 | LD H,0 | Load H with zero (RLE attribute data index already in L)... | ||
| 39117 | ADD HL,HL | ...and multiply by four... | ||
| 39118 | ADD HL,HL | ... | ||
| 39119 | LD BC,60487 | Point BC at start of lookup table for RLE attribute data (room layout graphics)... | ||
| 39122 | ADD HL,BC | ...and add HL as offset, loading result into HL | ||
| 39123 | EX DE,HL | Swap DE (now points to entry in RLE attribute lookup table at 60487) and HL (L now RLE terrain interaction data index) | ||
| 39124 | LD H,0 | Load H with zero (RLE terrain interaction data index already in L)... | ||
| 39126 | ADD HL,HL | ...and multiply by four... | ||
| 39127 | ADD HL,HL | ... | ||
| 39128 | LD BC,60889 | Point BC at start of lookup table for RLE terrain interaction data (room layout graphics)... | ||
| 39131 | ADD HL,BC | ...and add HL as offset, loading result into HL | ||
| 39132 | EX DE,HL | Swap DE and HL | ||
| 39133 | PUSH DE | Store DE (pointer to required entry in RLE terrain interaction lookup table) | ||
| 39134 | INC IX | Advance to mirror options... | ||
| 39136 | LD A,(IX+0) | ...and load into A | ||
| 39139 | PUSH IX | Store IX (current position in room layout data) | ||
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The following jumps handle the painting of the current room layout data entry's attribute and terrain interaction data. After this painting is completed, IX is advanced to the start of the next room layout data entry and a jump back to 39067 occurs to process this next entry.
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| 39141 | OR A | Paint room layout data entry's attributes and terrain interaction data applying appropriate mirrors, then process next entry | ||
| 39142 | JP Z,40937 | |||
| 39145 | CP 1 | |||
| 39147 | JP Z,40905 | |||
| 39150 | CP 2 | |||
| 39152 | JP Z,40873 | |||
| 39155 | JP 40845 | |||
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