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Routines |
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| PrintString | 7488 | PUSH HL | Stash HL on the stack. | |||||
| 7489 | CALL ScreenAddress | Call ScreenAddress. | ||||||
| 748C | LD A,(DE) | Fetch the attribute byte. | ||||||
| 748D | EX AF,AF' | Switch to the shadow AF register. | ||||||
| 748E | INC DE | Increment DE by one to point to the text of the string. | ||||||
| 748F | EXX | Switch to the shadow registers. | ||||||
| 7490 | POP HL | Restore HL from the stack. | ||||||
| 7491 | CALL AttributeAddress | Call AttributeAddress. | ||||||
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This entry point is used by the routine at MenuWriteText.
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| PrintString_Loop | 7494 | EXX | Switch back to the normal registers. | |||||
| 7495 | LD A,(DE) | Fetch the character to print. | ||||||
| 7496 | BIT 7,A | If bit 7 is set (which signifies the end of the string), jump to PrintString_LastCharacter. | ||||||
| 7498 | JR NZ,PrintString_LastCharacter | |||||||
| 749A | CALL PrintScreen | Call PrintScreen. | ||||||
| 749D | INC DE | Increment DE by one. | ||||||
| 749E | EXX | Switch to the shadow registers. | ||||||
| 749F | EX AF,AF' | Switch to the shadow AF register. | ||||||
| 74A0 | LD (HL),A | Copy the attribute byte to the screen. | ||||||
| 74A1 | INC L | Increment L by one. | ||||||
| 74A2 | EX AF,AF' | Switch to the shadow AF register. | ||||||
| 74A3 | JR PrintString_Loop | Jump to PrintString_Loop. | ||||||
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Because the last character contains the terminator, it needs to be handled separately.
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| PrintString_LastCharacter | 74A5 | AND %01111111 | Keep only bits 0-6 (i.e. strip the bit 7 terminator). | |||||
| 74A7 | CALL PrintScreen | Call PrintScreen. | ||||||
| 74AA | EXX | Switch to the shadow registers. | ||||||
| 74AB | EX AF,AF' | Switch to the shadow AF register. | ||||||
| 74AC | LD (HL),A | Copy the attribute byte to the screen. | ||||||
| 74AD | RET | Return. | ||||||
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