;;A bankswitching demo for the F8 BS technique. 2 4K banks (8K total) ;;By: Rick Skrbina processor 6502 include "vcs.h" include "macro.h" seg.u vars org $80 PF_Color ds 1 seg Bank_0 org $E000 rorg $F000 nop nop nop Start_0 CLEAN_START ; jsr Call_1 lda #$FF sta PF1 StartFrame lda #2 sta VBLANK sta VSYNC sta WSYNC sta WSYNC sta WSYNC lda #0 sta VSYNC ldy #37 Vert sta WSYNC dey bne Vert lda #0 sta VBLANK ldy #192 Pic sta WSYNC dey bne Pic lda #2 sta VBLANK ldy #30 Over sta WSYNC dey bne Over jsr Call_1 lda PF_Color sta COLUPF jmp StartFrame org $EFE0 rorg $FFE0 Call_1 stx $FFF9 nop nop nop nop nop nop rts org $EFF8 rorg $FFF8 .word $FFFF .word Start_0 .word Start_0 .word Start_0 seg Bank_1 org $F000 rorg $F000 Init_1 sta $FFF8 Bank1_Sub ; lda #$0F ; sta COLUPF inc PF_Color rts org $FFE3 rorg $FFE3 jsr Bank1_Sub stx $FFF8 org $FFF8 .word $FFFF .word Init_1 .word Init_1 .word Init_1