2020/c64/main.asm

52 lines
828 B
NASM

// vim: filetype=kickass
#import "math.inc"
* = $0801 // BASIC start address (#2049)
.byte $0d,$08,$dc,$07,$9e,$20,$34,$39 // BASIC loader to start at $c000...
.byte $31,$35,$32,$00,$00,$00 // puts BASIC line 2012 SYS 49152
* = $c000
.const SCREEN_RAM = $0400
.const COLOR_RAM = $d800
.const kernal_scinit = $ff81
.const kernal_chrout = $ffd2
.const kernal_write_byte = $e716
.const zp_temp = $02
.const cursor_pointer_lo = $05
.const cursor_pointer_hi = $06
.macro move_16_imm(dst_lo, dst_hi, src) {
lda #<src
sta dst_lo
lda #>src
sta dst_hi
}
//
// main
//
main:
jsr clear_screen
// lda #0
// sta $d020
// sta $d021
jsr day01
!loop:
// inc $d020
jmp !loop-
buffer:
.fill $0100, 0
#import "day01.asm"
#import "screen.asm"