cpu

src/cpu.c

@@ -0,0 +1,20 @@
+//cpu.c
+#include <inttypes.h>
+
+//the idea of this being its own file is that you can 
+//swap in and out different cpus
+
+/*
+    general purpose registers start with "r"
+    kinda like powerpc
+*/
+
+typedef struct _cpu {
+    uint8_t r0, r1, r2, r3, r4, r5;
+    uint8_t sp, bp;
+    uint8_t flags;
+} cpu;
+
+//public
+
+//private

src/main.c

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+#include <stdio.h>
+#include <inttypes.h>
+#include <string.h>
+#include <raylib.h>
+
+#define overload _Generic
+
+#define WIDTH 640
+#define HEIGHT 480
+#define VMEM WIDTH * HEIGHT
+
+Color video_memory[VMEM] = {};
+Image charset[26];
+
+void draw_frame() {
+    for (int i = 0; i < WIDTH; i++) {
+        for (int j = 0; j < HEIGHT; j++) {
+            DrawPixel(i, j, video_memory[i + (j * WIDTH)]);
+        }
+    }
+}
+
+void red_line(Color *vmem) {
+    static int i = 0;
+    for (; i < 70; i++) {
+        video_memory[i] = RED;
+    }
+}
+
+void write_image(Color *vmem, Image image, uint32_t x, uint32_t y) {
+    for (int i = 0; i < 16; i++) {
+        int image_size = image.width * sizeof(uint32_t); //16 pixels, 4 bytes per pixel
+        memcpy(vmem + (i * WIDTH) + (y * WIDTH * 16) + (x * 16),  &image.data[i * image_size], image_size);
+    }
+}
+
+void load_charset() {    
+    char filenames[][26] = {
+        "resources/A.png", 
+        "resources/B.png",
+        "resources/C.png", 
+        "resources/D.png",
+        "resources/E.png", 
+        "resources/F.png",
+        "resources/G.png", 
+        "resources/H.png",
+        "resources/I.png", 
+        "resources/J.png",
+        "resources/K.png", 
+        "resources/L.png",
+        "resources/M.png", 
+        "resources/N.png",
+        "resources/O.png", 
+        "resources/P.png",
+        "resources/Q.png", 
+        "resources/R.png",
+        "resources/S.png", 
+        "resources/T.png",
+        "resources/U.png", 
+        "resources/V.png",
+        "resources/W.png", 
+        "resources/X.png",
+        "resources/Y.png", 
+        "resources/Z.png"        
+    };
+
+    for (int i = 0; i < 26; i++) {
+        charset[i] = LoadImage(filenames[i]);
+    }
+}
+
+int main(void) {
+    InitWindow(WIDTH, HEIGHT, "Computer :3");
+    SetTargetFPS(60);
+
+    load_charset();
+
+    int i = 0;
+
+    while (!WindowShouldClose()) {
+        BeginDrawing();
+        ClearBackground(BLUE);
+
+        draw_frame();
+        write_image(&video_memory, charset[i++ % 26], 0, 0);
+
+        EndDrawing();
+    }
+
+    return 0;
+}