Well time has come. Sideborders mystery. Spend two days reading all about VIC II and opening sideborders. Trickery with 38/40 columns and exact on time. First we need stable raster routine. Can we use something like to get stable raster first:
NOP ;2
BIT $00 ;2+3
LDA #0 ;2
STA $D020 ;3
LDA Bitte melde dich an, um diesen Link zu sehen. ;2
STA $D020 ;3
LDA Bitte melde dich an, um diesen Link zu sehen. ;2
STA $D020 ;3
NOP ;2
LDA #0 ;2
STA $D020 ;3
And for opening borders:
DEC $D016 ;6
INC $D016 ;6
This is for opening one rasterline. Set under IRQ.asm where I use IRQ in chains at raster position $32.