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Routines |
| Prev: F544 | Up: Map | Next: F5C4 |
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Used by the routine at JumpTable_InitialiseDisplay.
Opens the upper screen, builds the line-address table and fills the IM 02 vector page at FD00 with FE.
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| Initialise_Display | F56A | LD A,$00 | Write 00 to *DF_SZ. | |
| F56C | LD ($5C6B),A | |||
| F56F | LD A,$02 | Open channel 02 via CHAN_OPEN. | ||
| F571 | CALL $1601 | |||
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Build 19 display-file addresses from CL_SET.
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| F574 | LD HL,$FF04 | HL=FF04. | ||
| F577 | LD BC,$0121 | BC=0121. | ||
| F57A | PUSH HL | Stash the table pointer on the stack. | ||
| Initialise_Display_Continue | F57B | PUSH BC | Stash the position on the stack. | |
| F57C | CALL $0DD9 | Call CL_SET. | ||
| F57F | POP BC | Fetch *DF_CC and add 21. | ||
| F580 | LD DE,($5C84) | |||
| F584 | LD HL,$0021 | |||
| F587 | ADD HL,DE | |||
| F588 | EX DE,HL | |||
| F589 | POP HL | Store that address in the table. | ||
| F58A | LD (HL),E | |||
| F58B | INC HL | |||
| F58C | LD (HL),D | |||
| F58D | INC HL | |||
| F58E | PUSH HL | |||
| F58F | INC B | Increase the row and jump to Initialise_Display_Continue until 19 rows are stored. | ||
| F590 | LD A,B | |||
| F591 | CP $19 | |||
| F593 | JR NZ,Initialise_Display_Continue | |||
| F595 | POP HL | Drop the leftover table pointer. | ||
| F596 | LD BC,$0018 | Write the default clip window to *ClipWindow. | ||
| F599 | LD ($6419),BC | |||
| F59D | LD BC,$0121 | |||
| F5A0 | LD ($641B),BC | |||
| F5A4 | LD DE,$5CB7 | Clear seven bytes at UDG. | ||
| F5A7 | LD HL,$5CB6 | |||
| F5AA | LD BC,$0007 | |||
| F5AD | LD (HL),$00 | |||
| F5AF | LDIR | |||
| F5B1 | LD HL,$643E | Write 00 to *Sprite_ShiftBuffer. | ||
| F5B4 | LD (HL),$00 | |||
| F5B6 | LD HL,$FD00 | Fill 0100 bytes at FD00 with FE. | ||
| F5B9 | LD DE,$FD01 | |||
| F5BC | LD BC,$0100 | |||
| F5BF | LD (HL),$FE | |||
| F5C1 | LDIR | |||
| F5C3 | RET | Return. | ||
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View the equivalent code in Booty.
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| Prev: F544 | Up: Map | Next: F5C4 |