Initial commit, with some added boiler plate.

.gitignore

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+# This ignore the build artifacts produced from running/building the Odin source code
+*.bin
+*.o

Makefile

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+APP_NAME := my_app
+SRC      := ./src
+
+.PHONY: all dev release clean
+
+all:
+	odin run $(SRC) -define:DEV=true
+
+dev:
+	odin build $(SRC) -out:$(APP_NAME) -define:DEV=true
+
+release:
+	odin build $(SRC) -out:$(APP_NAME) -o:speed
+
+clean:
+	rm -f $(APP_NAME)

src/machine/display.odin

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+package machine
+
+// Display will handle all the screen drawing with raylib etc

src/machine/machine.odin

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+package machine
+
+import "core:os"
+import "core:log"
+
+System :: struct {
+    // 4kb ram
+    memory: [4096]u8,
+    // 16 general purpose 8bit registers 0 -> F
+    v: [16]u8,
+    // Call stack, up to 16, 2 byte addresses.
+    stack: [16]u16,
+    // Stack pointer
+    sp: u8,
+    // index register
+    i: u16,
+    // PC program counter
+    pc: u16,
+    // 64x32-pixel monochrome display
+    display: [64][32]u8,
+    keypad: [16]bool,
+    delay_timer: u8,
+    sound_timer: u8,
+}
+
+FONT_SET := [80]u8 {
+    0xF0, 0x90, 0x90, 0x90, 0xF0,		// 0
+    0x20, 0x60, 0x20, 0x20, 0x70,		// 1
+    0xF0, 0x10, 0xF0, 0x80, 0xF0,		// 2
+    0xF0, 0x10, 0xF0, 0x10, 0xF0,		// 3
+    0x90, 0x90, 0xF0, 0x10, 0x10,		// 4
+    0xF0, 0x80, 0xF0, 0x10, 0xF0,		// 5
+    0xF0, 0x80, 0xF0, 0x90, 0xF0,		// 6
+    0xF0, 0x10, 0x20, 0x40, 0x40,		// 7
+    0xF0, 0x90, 0xF0, 0x90, 0xF0,		// 8
+    0xF0, 0x90, 0xF0, 0x10, 0xF0,		// 9
+    0xF0, 0x90, 0xF0, 0x90, 0x90,		// A
+    0xE0, 0x90, 0xE0, 0x90, 0xE0,		// B
+    0xF0, 0x80, 0x80, 0x80, 0xF0,		// C
+    0xE0, 0x90, 0x90, 0x90, 0xE0,		// D
+    0xF0, 0x80, 0xF0, 0x80, 0xF0,		// E
+    0xF0, 0x80, 0xF0, 0x80, 0x80		// F
+}
+
+init :: proc() -> System {
+    log.info("Booting chip 8 cpu")
+
+    // Structs are zero initialized so timers, sp etc are good.
+    s := System { pc = 0x200 }
+
+    // load fonts into the memory
+    for v, i in FONT_SET {
+        s.memory[i] = v
+    }
+
+    return s
+}
+
+load_rom :: proc(s: ^System, file_path: string) -> os.Error {
+    log.info("Loading rom from file")
+
+    data, read_err := os.read_entire_file(file_path, context.allocator)
+    if read_err != os.ERROR_NONE {
+        log.errorf("failed to read rom %v", read_err)
+        return read_err
+    }
+    defer delete(data)
+
+    for byte,i in data {
+        s.memory[0x200 + i] = byte
+    }
+
+    log.infof("First few bytes: %X %X %X %X", s.memory[0x200], s.memory[0x201], s.memory[0x202], s.memory[0x203])
+
+    return nil
+}
+
+// fetch decode execute loop
+run :: proc(s: ^System) {
+    log.info("=== TODO loop ===")
+    // maybe needs a few functions for the 'screen' ie raylib.
+    // also a cycle function or something that will do the ops
+}
+

src/main.odin

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+package main
+
+import "core:log"
+import "core:mem"
+
+import chip "machine"
+
+// false = release default
+DEV :: #config(DEV, false)
+
+main :: proc() {
+    context.logger = log.create_console_logger()
+    defer log.destroy_console_logger(context.logger)
+
+    when DEV {
+        track: mem.Tracking_Allocator
+        mem.tracking_allocator_init(&track, context.allocator)
+        defer mem.tracking_allocator_destroy(&track)
+
+        context.allocator = mem.tracking_allocator(&track)
+    }
+
+    // Init the Chip 8 "cpu"
+    system := chip.init()
+
+    // load rom, hardcoded for now, will eventually be cli or gui
+    err := chip.load_rom(&system, "./2-ibm-logo.ch8")
+    if err != nil {
+        panic("failed to load rom!")
+    }
+
+    // start the cycle
+    chip.run(&system)
+
+    when DEV {
+        if len(track.allocation_map) > 0 {
+            log.errorf("\nMEMORY LEAKS: %v allocation(s)", len(track.allocation_map))
+            for _, entry in track.allocation_map {
+                log.errorf("  %v bytes @ %v", entry.size, entry.location)
+            }
+        }
+
+        if len(track.bad_free_array) > 0 {
+            log.errorf("\nBAD FREES: %v", len(track.bad_free_array))
+
+            for entry in track.bad_free_array {
+                log.errorf("  %v @ %v", entry.memory, entry.location)
+            }
+        }
+    }
+}