license

6502.c

@@ -0,0 +1,3 @@
+#include <stdio.h>
+
+int main() { printf("Hello, World!\n"); }

LICENSE

@@ -0,0 +1,24 @@
+BSD 2-Clause License
+
+Copyright (c) 2025, Antoni Piasecki
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice, this
+   list of conditions and the following disclaimer.
+
+2. Redistributions in binary form must reproduce the above copyright notice,
+   this list of conditions and the following disclaimer in the documentation
+   and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

build.sh

@@ -1,3 +1,4 @@
 #!/bin/bash
 set -xe
-cc -O3 -o chip8 chip8.c -L/usr/local/lib/libraylib.a -lraylib -lm
+cc -O3 -o chip8 chip8.c -L/usr/local/lib/libraylib.a -lraylib -lm
+cc -O3 -o 6502 6502.c

chip8.c

@@ -1,5 +1,4 @@
 // http://devernay.free.fr/hacks/chip8/C8TECH10.HTM
-// TODO: buzzer
 #include <raylib.h>
 #include <stdint.h>
 #include <stdio.h>
@@ -68,10 +67,10 @@ CHIP8 chip8_create() {
 
 void chip8_disassemble(CHIP8 *c, size_t ins_count) {
   for (size_t i = 0; i < ins_count; i++) {
-    READ_INS();
-
     printf("0x%x: ", c->pc);
 
+    READ_INS();
+
     switch ((ins >> 12) & 0xF) {
     case 0x0: {
       switch (nnn) {
@@ -212,6 +211,7 @@ void chip8_step(CHIP8 *c) {
     }
     if (c->sound_timer > 0) {
       c->sound_timer--;
+      // TODO: buzzer
     }
 
     READ_INS();