Routines
Prev: 0AD4 Up: Map Next: 0AFA
0ADC: set_character_pointer: Set character_pointer to start of current row in page display buffer.
Used by the routine at decode_row.
set_character_pointer 0ADC LD DE,(page_display_buffer_pointer) Load page_display_buffer_pointer into DE.
0AE0 LD A,(row_number) If row_number is zero, jump to set_character_pointer_0.
0AE3 AND A
0AE4 JR Z,set_character_pointer_0
0AE6 LD B,A Else multiply row number by 40 and add to address in DE to get address of first character of row.
0AE7 ADD A,A
0AE8 ADD A,A
0AE9 ADD A,B
0AEA LD L,A
0AEB LD H,$00
0AED ADD HL,HL
0AEE ADD HL,HL
0AEF ADD HL,HL
0AF0 ADD HL,DE
0AF1 LD (character_pointer),HL Store address in character_pointer and return.
0AF4 RET
set_character_pointer_0 0AF5 LD (character_pointer),DE Store DE in character_pointer and return.
0AF9 RET
Prev: 0AD4 Up: Map Next: 0AFA