2 files changed, 29 insertions(+), 0 deletions(-)

M cmd/hdmg/main.ha
A dmg/dmg.ha

@@ 9,4 9,7 @@ export fn main() void = {
 	const cart = cart::load(file)!;
 	defer cart::cart_free(cart);
 	fmt::println(cart.title)!;
+
+	const dmg = dmg::init(cart);
+	defer dmg::finish(&dmg);
 };

@@ 0,0 1,26 @@
+use dmg::cart;
+use sm83;
+
+export type dmg = struct {
+	cart: *cart::cart,
+	cpu: sm83::sm83,
+	mmu: *mmu,
+};
+
+// Initializes a new DMG emulator.
+export fn init(cart: *cart::cart) dmg = {
+	let mmu = new_mmu(cart);
+	let cpu = sm83::init(mmu);
+	// XXX: Other power-on registers? From which BIOS model?
+	cpu.regs.PC = 0x100;
+	cpu.regs.SP = 0xFFFE;
+	return dmg {
+		cart = cart,
+		cpu = cpu,
+		mmu = mmu,
+	};
+};
+
+export fn finish(dmg: *dmg) void = {
+	mmu_free(dmg.mmu);
+};