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Routines |
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| E9DA | LD A,R | A=the contents of the Memory Refresh Register. | ||
| E9DC | PUSH AF | Stash AF on the stack. | ||
| E9DD | DI | Disable interrupts. | ||
| E9DE | LD B,$02 | B=02. | ||
| E9E0 | PUSH BC | Stash BC on the stack. | ||
| E9E1 | LD BC,$1388 | BC=1388. | ||
| E9E4 | DEC BC | Decrease BC by one. | ||
| E9E5 | LD A,B | Jump to E9E4 if BC is not zero. | ||
| E9E6 | OR C | |||
| E9E7 | JR NZ,$E9E4 | |||
| E9E9 | LD HL,$5800 | HL=5800 (screen buffer location). | ||
| E9EC | LD BC,$0300 | BC=0300. | ||
| E9EF | LD A,(HL) | A=*HL. | ||
| E9F0 | XOR %01111111 | Flip bits 0-6. | ||
| E9F2 | LD (HL),A | Write A to *HL. | ||
| E9F3 | INC HL | Increment HL by one. | ||
| E9F4 | DEC BC | Decrease BC by one. | ||
| E9F5 | LD A,B | Jump to E9EF if BC is not zero. | ||
| E9F6 | OR C | |||
| E9F7 | JR NZ,$E9EF | |||
| E9F9 | POP BC | Restore BC from the stack. | ||
| E9FA | DJNZ $E9E0 | Decrease counter by one and loop back to E9E0 until counter is zero. | ||
| E9FC | POP AF | Restore AF from the stack. | ||
| E9FD | RET PO | Return if BC is odd. | ||
| E9FE | EI | Enable interrupts. | ||
| E9FF | RET | Return. | ||
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