|
Routines |
| Prev: 9818 | Up: Map | Next: 9837 |
|
|
||||
| ControlCode_SetBrightBit | 9821 | LD HL,$F81E | Set a pointer to Print_AttributeVariable in HL. | |
| 9824 | LD A,(HL) | Fetch the current print attribute colour and store it in A. | ||
| 9825 | AND %10111111 | Mask off the current BRIGHT bit. | ||
| 9827 | LD (HL),A | Write the value back to *Print_AttributeVariable. | ||
| 9828 | LD A,($F80C) | Fetch the new BRIGHT value from *PrintVariable_01. | ||
| 982B | CP $02 | Jump to Helper_Return if the new BRIGHT value is invalid (02 or higher), valid values are either 00 or 01. | ||
| 982D | JP NC,Helper_Return | |||
| 9830 | RRCA | Shift the value into bit 6 so it applies for BRIGHT. | ||
| 9831 | RRCA | |||
| 9832 | OR (HL) | Set the new BRIGHT value with the current print attribute colour held by *HL. | ||
| 9833 | LD (HL),A | Write the updated value back to *Print_AttributeVariable. | ||
| 9834 | JP ControlCode_Return_1 | Jump to ControlCode_Return_1. | ||
| Prev: 9818 | Up: Map | Next: 9837 |