|
Routines |
| Prev: 714C | Up: Map | Next: 7192 |
|
||||||||
| PrintString | 716C | PUSH HL | Stash HL on the stack. | |||||
| 716D | CALL ScreenAddress | Call ScreenAddress. | ||||||
| 7170 | LD A,(DE) | Fetch the attribute byte. | ||||||
| 7171 | EX AF,AF' | Switch to the shadow AF register. | ||||||
| 7172 | INC DE | Increment DE by one to point to the text of the string. | ||||||
| 7173 | EXX | Switch to the shadow registers. | ||||||
| 7174 | POP HL | Restore HL' from the stack. | ||||||
| 7175 | CALL AttributeAddress | Call AttributeAddress. | ||||||
|
This entry point is used by the routine at PrintMenuItem.
|
||||||||
| PrintString_Loop | 7178 | EXX | Switch back to the normal registers. | |||||
| 7179 | LD A,(DE) | Fetch the character to print. | ||||||
| 717A | BIT 7,A | If bit 7 is set (which signifies the end of the string), jump to PrintString_LastCharacter. | ||||||
| 717C | JR NZ,PrintString_LastCharacter | |||||||
| 717E | CALL PrintScreen | Call PrintScreen. | ||||||
| 7181 | INC DE | Increment DE by one. | ||||||
| 7182 | EXX | Switch to the shadow registers. | ||||||
| 7183 | EX AF,AF' | Switch to the shadow AF register. | ||||||
| 7184 | LD (HL),A | Copy the attribute byte to the screen. | ||||||
| 7185 | INC L | Increment L by one. | ||||||
| 7186 | EX AF,AF' | Switch to the shadow AF register. | ||||||
| 7187 | JR PrintString_Loop | Jump to PrintString_Loop. | ||||||
|
Because the last character contains the terminator, it needs to be handled separately.
|
||||||||
| PrintString_LastCharacter | 7189 | AND %01111111 | Keep only bits 0-6 (i.e. strip the bit 7 terminator). | |||||
| 718B | CALL PrintScreen | Call PrintScreen. | ||||||
| 718E | EXX | Switch to the shadow registers. | ||||||
| 718F | EX AF,AF' | Switch to the shadow AF register. | ||||||
| 7190 | LD (HL),A | Copy the attribute byte to the screen. | ||||||
| 7191 | RET | Return. | ||||||
|
View the equivalent code in;
|
||||||||
| Prev: 714C | Up: Map | Next: 7192 |