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Routines |
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| 36475 | PUSH HL | Store HL | ||||||
| 36476 | LD DE,63732 | Point to graphic (Magic Knight, frame 1, facing left) | ||||||
| 36479 | ADD A,A | Load index of character into HL and multiply by 8... | ||||||
| 36480 | LD H,0 | ... | ||||||
| 36482 | LD L,A | ... | ||||||
| 36483 | ADD HL,HL | ... | ||||||
| 36484 | ADD HL,HL | ... | ||||||
| 36485 | ADD HL,DE | ...and add to DE to obtain memory location of required character in the character set | ||||||
| 36486 | EX DE,HL | Swap values (DE now holds memory location of character to print and HL holds 63732) | ||||||
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The operand of the instruction at 36487 represents the display file address to print to. This is modified by the instructions at 28272 and 36551.
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| 36487 | LD HL,0 | Load HL with the display file address to print character to | ||||||
| 36490 | LD B,8 | For eight bytes (i.e. full height of character)... | ||||||
| 36492 | LD A,(DE) | ...get graphic data from character set... | ||||||
| 36493 | LD (HL),A | ...and load into display file... | ||||||
| 36494 | INC DE | ...move to next pixel row in character set... | ||||||
| 36495 | INC H | ...and move to next pixel row in display file | ||||||
| 36496 | DJNZ 36492 | Loop back to 36492 if there are more rows to draw | ||||||
| 36498 | CALL 36709 | Load memory location 23487 (and HL) with memory location of attribute data (attribute file) for character just printed | ||||||
| 36501 | LD A,(23695) | Load A with attribute stored at 23695 (71 = white INK, black PAPER, BRIGHT) | ||||||
| 36504 | LD (HL),A | Apply attribute to character just printed | ||||||
| 36505 | CALL 36606 | Advance display file pointer to next location (for printing room name) | ||||||
| 36508 | POP HL | Restore HL | ||||||
| 36509 | RET | Return | ||||||
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