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Routines |
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Used by the routine at FollowLinkPointer.
Reads the word at B868 and stores it in the word at ActiveTextPointer.
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| ReadPointerFirstDisplay | B8AA | LD HL,($B868) | Read the word at B868, store it in the word at ActiveTextPointer and clear A. | |
| B8AD | LD ($A02B),HL | |||
| B8B0 | XOR A | |||
| B8B1 | LD ($A024),A | Clear the command mode at A024. | ||
| B8B4 | LD HL,($9FF0) | Read the first display link and clear the pointer. | ||
| B8B7 | PUSH HL | |||
| B8B8 | LD HL,$0000 | |||
| B8BB | LD ($9FF0),HL | Store the pointer in the first display link. | ||
| ReadPointerFirstDisplay_PrepareCharacterDisplay | B8BE | CALL PrepareCharacterForDisplay | Go to ReadPointerFirstDisplay_ObjectProcessingSource if PrepareCharacterForDisplay returns zero. | |
| B8C1 | JR Z,ReadPointerFirstDisplay_ObjectProcessingSource | |||
| B8C3 | CP $02 | Jump ahead to ReadPointerFirstDisplay_ReadsFirstDisplay if it is not 02. | ||
| B8C5 | JR NZ,ReadPointerFirstDisplay_ReadsFirstDisplay | |||
| ReadPointerFirstDisplay_ObjectProcessingSource | B8C7 | LD HL,($A02B) | Read the word at ActiveTextPointer. | |
| B8CA | LD A,(HL) | Jump back to ReadPointerFirstDisplay_PrepareCharacterDisplay while the high nibble is not C0. | ||
| B8CB | AND $F0 | |||
| B8CD | CP $C0 | |||
| B8CF | JR NZ,ReadPointerFirstDisplay_PrepareCharacterDisplay | |||
| B8D1 | LD (HL),$90 | Use 08 for the character code, then call AllocateMemory to allocate memory. | ||
| B8D3 | LD A,$08 | |||
| B8D5 | CALL AllocateMemory | |||
| B8D8 | LD HL,($9FEE) | Read the list head and make this record the new head. | ||
| B8DB | LD ($9FEE),IX | |||
| B8DF | LD (IX-$02),L | Store the low byte of the old list head in the link word ahead of this record. | ||
| B8E2 | LD (IX-$01),H | Store the high byte of the old list head in the link word ahead of this record, and read the word at 9FEE+02. | ||
| B8E5 | LD HL,($9FF0) | |||
| B8E8 | LD (IX+$05),L | Store the low byte of the first display link at offset 05. | ||
| B8EB | LD (IX+$06),H | Store the high byte of that link at offset 06 and keep the stacked pointer as the first display link. | ||
| B8EE | POP HL | |||
| B8EF | LD ($9FF0),HL | |||
| B8F2 | XOR A | Clear the moved marker and read the room display parameter. | ||
| B8F3 | LD (IX+$01),A | |||
| B8F6 | LD A,($A034) | |||
| B8F9 | LD (IX+$00),A | Store the record's flag byte. | ||
| B8FC | LD A,($A024) | Copy A024 to offset 7. | ||
| B8FF | LD (IX+$07),A | |||
| B902 | XOR A | |||
| B903 | RET | Return. | ||
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Reads the first display link, then stores the saved pointer back into that link.
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| ReadPointerFirstDisplay_ReadsFirstDisplay | B904 | PUSH AF | Call ReadFirstDisplayLink to read the first display link. | |
| B905 | CALL ReadFirstDisplayLink | |||
| B908 | POP AF | |||
| B909 | POP HL | |||
| B90A | LD ($9FF0),HL | Store the pointer in the first display link. | ||
| B90D | RET | Return. | ||
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