nurpax

; Note: optimized to rely on dst ptr to be 64-byte aligned (as sprites are)
clear_writer_sprite_row: {
    +mov16($30, zp_sprite_dst)

    ldx #num_writer_sprites
sprite_loop:
    lda $31
    sta dstp0-1
    sta dstp1-1
    sta dstp2-1

nurpax

export interface Node {
  loc: SourceLoc;
}

export type Expr = any | Ident | Literal
export type Stmt =
    StmtInsn
  | StmtSetPC
  | StmtAlign
  | StmtData

nurpax

const CW = 6;
const CH = 7;

function readSprites({readFileSync, resolveRelative}, filename) {
    const buf = readFileSync(resolveRelative(filename.lit));
    const numSprites = buf.readUInt8(4);
    const data = [];
    for (let i = 0; i < numSprites; i++) {
        const offs = i*64+9;
        const bytes = [];

nurpax

{
    // See https://go.microsoft.com/fwlink/?LinkId=733558
    // for the documentation about the tasks.json format
    "version": "2.0.0",
    "tasks": [
        {
            "label": "c64jasm build & run",
            "type": "shell",
            "command": "c64jasm main.asm --out main.prg && x64 main.prg",
            "problemMatcher": "$c64jasm"

nurpax

FALSE=0
TRUE=1

irq0_line = 100
irq1_line = 150

!macro basic_start(addr) {
* = $801
    !byte $0c
    !byte $08

nurpax

!macro basic_start(addr) {
* = $801
    !byte $0c
    !byte $08
    !byte $00
    !byte $00
    !byte $9e
!if (addr >= 10000) {
    !byte $30 + (addr/10000)%10
}

nurpax

.const zptmp0 = $60
.const zptmp1 = $62
.const zptmp2 = $64
.const zptmp3 = $68

.const zp_dstptr = zptmp0
.const zp_srcptr = zptmp1
.const zp_nlines = zptmp2

nurpax

.var spdDataTemplate = "Magic=$0,Version=$3,NumSprites=$4,NumAnims=$5,Bg=$6,Multicol1=$7,Multicol2=$8"
.var iiro = LoadBinary("sprites/iiro.spd", spdDataTemplate)

.macro setupSprites(spd, data, dblw, dblh) {
    .const numSprites = spd.getNumSprites()+1
    .const spriteMask = ((1 << numSprites)-1)
    .var xScale = 1
    .var yScale = 1
    lda #spriteMask

nurpax

const reverseBits = (b) => {
  const b0 = (b & 1) >> 0
  const b1 = (b & 2) >> 1
  const b2 = (b & 4) >> 2
  const b3 = (b & 8) >> 3
  const b4 = (b & 16) >> 4
  const b5 = (b & 32) >> 5
  const b6 = (b & 64) >> 6
  const b7 = (b & 128) >> 7

nurpax

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int main(int argc, const char **argv)
{
    FILE* fpi = fopen(argv[1], "rb");
    FILE* fpo = fopen(argv[2], "wb");