;;Settings positions CR1 = $d011; ;Graphic settings VIC_bank_settings = $DD00 ; Vic position Screen_RAM_settings =$D018 ;Screen RAM position relative to VIC ;;########## VIC_BANK ################ ;;# BITMAP | $4000 -$5F3F ;;# Unused? | $5F3F - $6000 ;;# SCREAN RAM (color) | $6000 -$63E7 ;;# Unused? | $63E8 - $7FFF ;;# ;;#################################### ;;Memory positions VIC_bank = $4000 VIC_bank_end = VIC_bank + $3FFF Bitmap = VIC_bank Bitmap_end = $5F3F Screen_RAM = $2000 + VIC_bank Screen_RAM_end = Screen_RAM + $03E7 Character_generator_ROM = $D000 ;;Free upp memory ;;https://www.c64-wiki.com/wiki/Bank_Switching ;; ;;Sets grafic mode [Standard bitmap mode] ;;https://www.c64-wiki.com/wiki/Standard_Bitmap_Mode LDA #%10111111 ; ECM = False AND CR1 STA CR1 LDA #%00100000; BMM = True ORA CR1 STA CR1 ;;Set VIC bank to bank 1 ;;https://www.c64-wiki.com/wiki/VIC_bank LDA #%11111110 ;bit_0 = False AND VIC_bank_settings STA VIC_bank_settings LDA #%00000010; bit_1 = True ORA VIC_bank_settings STA VIC_bank_settings ;;Set Scren-RAM to offset 8 ;https://www.c64-wiki.com/wiki/53272 (offset is 8k byte = 1024*8-ich) LDA #%10001111 ; bit_6 =bit_5=bit_4 = Falsw AND Screen_RAM_settings STA Screen_RAM_settings LDA #%10000000; bit_1 = True ORA Screen_RAM_settings STA Screen_RAM_settings ;;Paint the bitmap black. More bitmap: https://www.c64-wiki.com/wiki/53272, https://www.c64-wiki.com/wiki/Screen_RAM#Moving_of_screen_RAM LDA #>VIC_bank STA $FC LDA #$5f3f STA $FE LDA #<$5f3f STA $FD LDA #$0 jsr memset ;;Sets the screen color to black and white LDA #>Screen_RAM STA $FC LDA #Screen_RAM_end STA $FE LDA #