LOAD equ $4000 SCNBASE equ $0400 SCNLEN equ $0200 org LOAD START lda #$ff Setup DP register tfr a,dp setdp $ff * Disable IRQ and FIRQ orcc #$50 Disable interrupts ldb $ff01 Disable hsync interrupt generation andb #$fa stb $ff01 tst $ff00 lda $ff03 Enable vsync interrupt generation ora #$05 sta $ff03 tst $ff02 jsr CLRSCN LOOP ldx #SCNBASE ldy #FRAME1 jsr WRITELN tst $ff02 sync tst $ff02 sync tst $ff02 sync tst $ff02 sync tst $ff02 sync tst $ff02 sync ldx #SCNBASE ldy #FRAME2 jsr WRITELN tst $ff02 sync tst $ff02 sync tst $ff02 sync tst $ff02 sync tst $ff02 sync tst $ff02 sync ldx #SCNBASE ldy #FRAME3 jsr WRITELN tst $ff02 sync tst $ff02 sync tst $ff02 sync tst $ff02 sync tst $ff02 sync tst $ff02 sync ldx #SCNBASE ldy #FRAME4 jsr WRITELN tst $ff02 sync tst $ff02 sync tst $ff02 sync tst $ff02 sync tst $ff02 sync tst $ff02 sync ldx #SCNBASE ldy #FRAME5 jsr WRITELN tst $ff02 sync tst $ff02 sync tst $ff02 sync tst $ff02 sync tst $ff02 sync tst $ff02 sync jmp LOOP * Clear the screen CLRSCN ldx #SCNBASE ldd #SCNLEN pshs d lda #$60 CLSLOOP sta ,x+ dec 1,s bne CLSLOOP dec ,s bne CLSLOOP leas 2,s rts WRITELN lda ,y+ beq WRLNEXT cmpa #$0d beq WRLNLF ora #$40 sta ,x+ bra WRITELN WRLNLF exg x,d andb #$e0 exg d,x leax $20,x bra WRITELN WRLNEXT rts FRAME1 fcb $20,$20,$20,$20,$20,$20,$20,$20,$69,$3B,$69,$27,$60,$20,$20,$20,$20,$20,$20,$20,$0D fcb $20,$20,$20,$20,$20,$20,$20,$27,$4D,$4D,$4D,$4D,$27,$20,$20,$20,$20,$20,$20,$20,$0D fcb $20,$20,$20,$20,$20,$20,$20,$2E,$4D,$4D,$23,$3B,$60,$20,$20,$20,$20,$20,$20,$20,$0D fcb $20,$20,$20,$20,$20,$20,$27,$23,$4D,$4D,$49,$27,$20,$20,$20,$20,$20,$20,$20,$20,$0D fcb $20,$20,$20,$20,$60,$20,$4F,$49,$4D,$4D,$4F,$49,$60,$20,$20,$20,$20,$20,$20,$20,$0D fcb $20,$20,$20,$20,$20,$60,$49,$4F,$49,$4D,$49,$4D,$27,$20,$20,$20,$20,$20,$20,$20,$0D fcb $20,$20,$20,$20,$20,$3B,$4D,$3B,$23,$49,$4D,$49,$4F,$27,$60,$20,$20,$20,$20,$20,$0D fcb $20,$20,$20,$20,$20,$4D,$4F,$4F,$4D,$4D,$4D,$23,$27,$27,$4F,$23,$27,$20,$20,$20,$0D fcb $20,$20,$20,$20,$4F,$49,$27,$49,$4D,$4D,$4D,$49,$4F,$20,$20,$20,$60,$20,$20,$20,$0D fcb $20,$20,$20,$20,$27,$27,$3B,$4D,$4D,$4D,$4F,$4D,$4D,$69,$20,$20,$20,$20,$20,$20,$0D fcb $20,$20,$20,$20,$20,$20,$4D,$4D,$4D,$27,$69,$49,$4D,$49,$27,$20,$20,$20,$20,$20,$0D fcb $20,$20,$20,$20,$27,$4F,$4D,$4D,$27,$20,$20,$60,$49,$4D,$4F,$20,$20,$20,$20,$20,$0D fcb $20,$20,$60,$4F,$4D,$49,$69,$20,$60,$20,$20,$20,$4F,$4D,$4D,$20,$20,$20,$20,$20,$0D fcb $20,$60,$49,$4F,$3B,$60,$20,$20,$20,$20,$20,$20,$27,$4D,$4D,$69,$20,$20,$20,$20,$0D fcb $4F,$49,$4F,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$2E,$4D,$49,$60,$20,$20,$20,$0D fcb $27,$4F,$49,$27,$27,$60,$20,$20,$20,$20,$20,$20,$20,$60,$4F,$4D,$49,$4F,$27,$60,0 FRAME2 fcb $20,$20,$20,$20,$20,$20,$20,$20,$4F,$4F,$4F,$3B,$60,$20,$20,$20,$20,$20,$20,$20,$0D fcb $20,$20,$20,$20,$20,$20,$20,$60,$4D,$4D,$4D,$4D,$3B,$20,$20,$20,$20,$20,$20,$20,$0D fcb $20,$20,$20,$20,$20,$20,$20,$20,$23,$4D,$4D,$3B,$60,$20,$20,$20,$20,$20,$20,$20,$0D fcb $20,$20,$20,$20,$20,$20,$20,$4F,$4D,$4D,$4D,$4F,$2E,$20,$20,$20,$20,$20,$20,$20,$0D fcb $20,$20,$20,$20,$20,$20,$60,$49,$4D,$4D,$4D,$4D,$4F,$20,$20,$20,$20,$20,$20,$20,$0D fcb $20,$20,$20,$20,$20,$20,$20,$4F,$4D,$4D,$49,$4D,$49,$20,$20,$20,$20,$20,$20,$20,$0D fcb $20,$20,$20,$20,$20,$20,$27,$49,$23,$49,$4D,$49,$4F,$20,$20,$20,$20,$20,$20,$20,$0D fcb $20,$20,$20,$20,$20,$20,$27,$4F,$4D,$4D,$49,$4D,$49,$69,$27,$20,$20,$20,$20,$20,$0D fcb $20,$20,$20,$20,$20,$20,$4F,$3B,$4D,$4D,$4D,$49,$4D,$4F,$4F,$20,$60,$20,$20,$20,$0D fcb $20,$20,$20,$20,$20,$60,$3B,$60,$27,$4D,$4D,$4D,$49,$27,$20,$20,$20,$20,$20,$20,$0D fcb $20,$20,$20,$20,$20,$20,$20,$20,$60,$49,$4D,$4D,$4F,$4F,$60,$20,$20,$20,$20,$20,$0D fcb $20,$20,$20,$20,$20,$20,$20,$69,$4F,$4D,$4D,$23,$49,$4D,$20,$20,$20,$20,$20,$20,$0D fcb $20,$20,$20,$20,$60,$3B,$4D,$49,$23,$27,$60,$4F,$4D,$49,$60,$20,$20,$20,$20,$20,$0D fcb $20,$20,$27,$4F,$49,$4F,$27,$60,$20,$20,$20,$27,$4D,$4D,$20,$20,$20,$20,$20,$20,$0D fcb $20,$20,$27,$49,$23,$20,$20,$20,$20,$20,$20,$20,$4F,$49,$27,$20,$20,$20,$20,$20,$0D fcb $2E,$60,$27,$27,$3B,$60,$20,$60,$2E,$60,$27,$60,$4F,$4D,$4D,$4F,$3B,$27,$20,$20,0 FRAME3 fcb $20,$20,$20,$20,$20,$20,$20,$3B,$4D,$4D,$4D,$27,$60,$20,$20,$20,$20,$20,$20,$20,$0D fcb $20,$20,$20,$20,$20,$20,$20,$4F,$4D,$4D,$4D,$4F,$20,$20,$20,$20,$20,$20,$20,$20,$0D fcb $20,$20,$20,$20,$20,$20,$60,$49,$4D,$49,$69,$20,$20,$20,$20,$20,$20,$20,$20,$20,$0D fcb $20,$20,$20,$20,$20,$20,$4F,$4D,$4D,$4D,$49,$27,$20,$20,$20,$20,$20,$20,$20,$20,$0D fcb $20,$20,$20,$20,$60,$20,$69,$49,$4D,$49,$4D,$4F,$60,$20,$20,$20,$20,$20,$20,$20,$0D fcb $20,$20,$20,$20,$20,$20,$27,$4D,$49,$4D,$4D,$23,$20,$20,$20,$20,$20,$20,$20,$20,$0D fcb $20,$20,$20,$20,$20,$20,$27,$49,$4D,$49,$4D,$4F,$20,$20,$20,$20,$20,$20,$20,$20,$0D fcb $20,$20,$20,$20,$20,$20,$60,$49,$4D,$49,$23,$49,$27,$20,$20,$20,$20,$20,$20,$20,$0D fcb $20,$20,$20,$20,$20,$20,$4F,$49,$4D,$49,$4D,$27,$60,$20,$20,$20,$20,$20,$20,$20,$0D fcb $20,$20,$20,$20,$20,$20,$20,$4F,$49,$23,$4D,$4F,$20,$20,$20,$20,$20,$20,$20,$20,$0D fcb $20,$20,$20,$20,$20,$20,$20,$27,$23,$49,$4D,$4D,$27,$20,$20,$20,$20,$20,$20,$20,$0D fcb $20,$20,$20,$20,$20,$20,$20,$69,$49,$4D,$4D,$4F,$27,$20,$20,$20,$20,$20,$20,$20,$0D fcb $20,$20,$20,$20,$60,$27,$23,$49,$4D,$49,$27,$20,$60,$20,$20,$20,$20,$20,$20,$20,$0D fcb $20,$20,$20,$4F,$49,$4F,$27,$27,$4D,$23,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$0D fcb $20,$20,$60,$27,$4D,$27,$20,$20,$4D,$4F,$60,$20,$20,$20,$20,$20,$20,$20,$20,$20,$0D fcb $2E,$60,$20,$60,$27,$27,$20,$27,$4D,$4D,$49,$69,$27,$60,$2E,$20,$20,$20,$20,$20,0 FRAME4 fcb $20,$20,$20,$20,$20,$20,$20,$2E,$4F,$4F,$4F,$3B,$60,$20,$20,$20,$20,$20,$20,$20,$0D fcb $20,$20,$20,$20,$20,$20,$20,$69,$4D,$4D,$4D,$4D,$27,$20,$20,$20,$20,$20,$20,$20,$0D fcb $20,$20,$20,$20,$20,$20,$60,$3B,$4D,$4D,$4F,$27,$20,$20,$20,$20,$20,$20,$20,$20,$0D fcb $20,$20,$20,$20,$20,$20,$4F,$4D,$4D,$4D,$49,$60,$20,$20,$20,$20,$20,$20,$20,$20,$0D fcb $20,$20,$20,$20,$60,$20,$4D,$4D,$4D,$4D,$4D,$49,$60,$20,$20,$20,$20,$20,$20,$20,$0D fcb $20,$20,$20,$20,$20,$60,$4D,$4D,$49,$4D,$4D,$4D,$27,$20,$20,$20,$20,$20,$20,$20,$0D fcb $20,$20,$20,$20,$20,$3B,$4D,$4F,$4D,$4D,$4D,$49,$23,$3B,$27,$2E,$60,$20,$20,$20,$0D fcb $20,$20,$20,$20,$20,$4F,$4D,$4D,$4D,$4D,$4D,$27,$27,$27,$3B,$4F,$3B,$20,$20,$20,$0D fcb $20,$20,$20,$2E,$23,$49,$4D,$4D,$4D,$4D,$4D,$49,$4F,$20,$20,$20,$60,$20,$20,$20,$0D fcb $20,$20,$20,$60,$27,$27,$4D,$4D,$4D,$4F,$4D,$4D,$4D,$4F,$20,$20,$20,$20,$20,$20,$0D fcb $20,$20,$20,$20,$20,$27,$4D,$4D,$4F,$20,$60,$27,$4D,$4D,$23,$20,$20,$20,$20,$20,$0D fcb $20,$20,$20,$20,$20,$4F,$4D,$4F,$2E,$20,$20,$20,$4F,$4D,$4D,$60,$20,$20,$20,$20,$0D fcb $20,$20,$20,$20,$4F,$4D,$4D,$2E,$20,$20,$20,$20,$23,$4D,$4D,$20,$20,$20,$20,$20,$0D fcb $20,$20,$20,$20,$4F,$4D,$4F,$20,$20,$20,$20,$20,$27,$4D,$4F,$20,$20,$20,$20,$20,$0D fcb $20,$20,$20,$20,$4F,$4D,$69,$20,$20,$20,$20,$20,$60,$49,$4D,$27,$27,$20,$20,$20,$0D fcb $2E,$60,$27,$27,$49,$23,$4F,$4F,$3B,$60,$20,$60,$27,$4F,$3B,$27,$27,$27,$20,$20,0 FRAME5 fcb $20,$20,$20,$20,$20,$20,$20,$27,$23,$4F,$4F,$27,$20,$20,$20,$20,$20,$20,$20,$20,$0D fcb $20,$20,$20,$20,$20,$20,$20,$4F,$4D,$4D,$4D,$4F,$20,$20,$20,$20,$20,$20,$20,$20,$0D fcb $20,$20,$20,$20,$20,$20,$60,$3B,$4D,$49,$4F,$2E,$20,$20,$20,$20,$20,$20,$20,$20,$0D fcb $20,$20,$20,$20,$20,$20,$3B,$4D,$4D,$4D,$4F,$60,$20,$20,$20,$20,$20,$20,$20,$20,$0D fcb $20,$20,$20,$20,$60,$2E,$4D,$49,$4D,$4D,$4D,$4F,$60,$20,$20,$20,$20,$20,$20,$20,$0D fcb $20,$20,$20,$20,$20,$4F,$4D,$4F,$4D,$4D,$4D,$4F,$27,$60,$20,$20,$20,$20,$20,$20,$0D fcb $20,$20,$20,$20,$60,$49,$4D,$49,$4D,$4D,$4D,$4F,$4F,$3B,$4F,$4F,$4F,$20,$20,$20,$0D fcb $20,$20,$20,$20,$4F,$4D,$4D,$4D,$4D,$4D,$49,$60,$20,$20,$20,$60,$27,$20,$20,$20,$0D fcb $20,$20,$60,$3B,$4D,$3B,$4D,$49,$4D,$4D,$4D,$3B,$60,$20,$20,$20,$60,$20,$20,$20,$0D fcb $20,$20,$20,$27,$27,$4F,$4D,$4D,$4D,$4D,$4D,$4D,$4F,$20,$20,$20,$20,$20,$20,$20,$0D fcb $20,$20,$20,$20,$60,$49,$4D,$49,$27,$27,$4D,$4D,$4D,$20,$20,$20,$20,$20,$20,$20,$0D fcb $20,$20,$20,$60,$4F,$4D,$4D,$27,$20,$20,$27,$4D,$4D,$4F,$20,$20,$20,$20,$20,$20,$0D fcb $20,$20,$20,$4F,$4D,$49,$60,$20,$20,$20,$20,$3B,$4D,$4D,$4F,$20,$20,$20,$20,$20,$0D fcb $20,$20,$27,$4D,$4D,$60,$20,$20,$20,$20,$20,$20,$27,$4D,$4D,$27,$20,$20,$20,$20,$0D fcb $20,$20,$4F,$4D,$69,$20,$20,$20,$20,$20,$20,$20,$20,$20,$4F,$49,$4F,$3B,$69,$20,$0D fcb $2E,$27,$4F,$4F,$49,$69,$27,$60,$2E,$60,$20,$20,$20,$60,$27,$4F,$3B,$27,$27,$20,0 end START