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Routines |
| Prev: 55985 | Up: Map | Next: 56110 |
| 55999 | LD A,(59229) | A=*59229. | ||
| 56002 | DEC A | Decrease A by one. | ||
| 56003 | LD (59231),A | Write A to *59231. | ||
| 56006 | LD A,(59230) | A=*59230. | ||
| 56009 | DEC A | Decrease A by one. | ||
| 56010 | LD (59232),A | Write A to *59232. | ||
| 56013 | LD B,4 | B=4. | ||
| 56015 | HALT | Halt operation (suspend CPU until the next interrupt). | ||
| 56016 | PUSH BC | Stash BC on the stack. | ||
| 56017 | LD A,(59231) | B=*59231. | ||
| 56020 | LD B,A | |||
| 56021 | LD A,(59232) | C=*59232. | ||
| 56024 | LD C,A | |||
| 56025 | CALL Calculate_ScreenBlockAddress | Call Calculate_ScreenBlockAddress. | ||
| 56028 | PUSH HL | Stash HL on the stack. | ||
| 56029 | LD A,0 | A=0. | ||
| 56031 | LD B,8 | B=8. | ||
| 56033 | PUSH BC | Stash BC and HL on the stack. | ||
| 56034 | PUSH HL | |||
| 56035 | LD B,4 | B=4. | ||
| 56037 | LD (HL),A | Write A to *HL. | ||
| 56038 | INC HL | Increment HL by one. | ||
| 56039 | DJNZ 56037 | Decrease counter by one and loop back to 56037 until counter is zero. | ||
| 56041 | POP HL | Restore HL and BC from the stack. | ||
| 56042 | POP BC | |||
| 56043 | INC H | Increment H by one. | ||
| 56044 | DJNZ 56033 | Decrease counter by one and loop back to 56033 until counter is zero. | ||
| 56046 | POP HL | Restore HL from the stack. | ||
| 56047 | CALL Calculate_AttributeAddress | Call Calculate_AttributeAddress. | ||
| 56050 | LD A,71 | A=71. | ||
| 56052 | LD B,4 | B=4. | ||
| 56054 | LD (DE),A | Write A to *DE. | ||
| 56055 | INC DE | Increment DE by one. | ||
| 56056 | DJNZ 56054 | Decrease counter by one and loop back to 56054 until counter is zero. | ||
| 56058 | POP BC | Restore BC from the stack. | ||
| 56059 | LD HL,59231 | HL=59231. | ||
| 56062 | INC (HL) | Increment *HL by one. | ||
| 56063 | DJNZ 56016 | Decrease counter by one and loop back to 56016 until counter is zero. | ||
| 56065 | LD A,(55347) | Return if *55347 is equal to 0. | ||
| 56068 | CP 0 | |||
| 56070 | RET Z | |||
| 56071 | LD B,3 | B=3. | ||
| 56073 | PUSH BC | Stash BC on the stack. | ||
| 56074 | LD A,5 | A=5. | ||
| 56076 | LD C,30 | C=30. | ||
| 56078 | LD B,40 | B=40. | ||
| 56080 | SLA B | Shift B left (with carry). | ||
| 56082 | DJNZ 56082 | Decrease counter by one and loop back to 56082 until counter is zero. | ||
| 56084 | XOR %00010000 | Flip bit 4. | ||
| 56086 | OUT (254),A | Set border to the colour held by A. | ||
| 56088 | DEC C | Decrease C by one. | ||
| 56089 | JR NZ,56078 | Jump to 56078 if C is not zero. | ||
| 56091 | LD C,20 | C=20. | ||
| 56093 | LD B,60 | B=60. | ||
| 56095 | SLA B | Shift B left (with carry). | ||
| 56097 | DJNZ 56097 | Decrease counter by one and loop back to 56097 until counter is zero. | ||
| 56099 | XOR %00010000 | Flip bit 4. | ||
| 56101 | OUT (254),A | Set border to the colour held by A. | ||
| 56103 | DEC C | Decrease C by one. | ||
| 56104 | JR NZ,56093 | Jump to 56093 if C is not zero. | ||
| 56106 | POP BC | Restore BC from the stack. | ||
| 56107 | DJNZ 56073 | Decrease counter by one and loop back to 56073 until counter is zero. | ||
| 56109 | RET | Return. | ||
| Prev: 55985 | Up: Map | Next: 56110 |