2 files changed, 46 insertions(+), 0 deletions(-)

A dmg/cart.ha
A dmg/mmu.ha

@@ 0,0 1,3 @@
+export type cart = struct {
+	rom0: [16384]u8,
+};

@@ 0,0 1,43 @@
+use sm83;
+
+export type mmu = struct {
+	sm83::mmu,
+	cart: *cart,
+	vram: [0x2000]u8,
+	ram0: [0x1000]u8,
+	ram1: [0x1000]u8,
+	sprites: [0xA0]u8,
+};
+
+// Creates a new DMG MMU.
+export fn new_mmu(cart: *cart) *mmu = {
+	return alloc(mmu {
+		readb = &mmu_readb,
+		readw = &mmu_readw,
+		writeb = &mmu_writeb,
+		writew = &mmu_writew,
+		cart = cart,
+		...
+	});
+};
+
+// Frees a DMG MMU.
+export fn mmu_free(mmu: *mmu) void = {
+	free(mmu);
+};
+
+fn mmu_readb(mmu: *sm83::mmu, addr: u16) u8 = {
+	abort(); // TODO
+};
+
+fn mmu_readw(mmu: *sm83::mmu, addr: u16) u16 = {
+	abort(); // TODO
+};
+
+fn mmu_writeb(mmu: *sm83::mmu, addr: u16, b: u8) void = {
+	abort(); // TODO
+};
+
+fn mmu_writew(mmu: *sm83::mmu, addr: u16, w: u16) void = {
+	abort(); // TODO
+};