Full savestating to memory

lib/dma.c

@@ -2,13 +2,6 @@
 #include <ppu.h>
 #include <bus.h>
 
-typedef struct {
-    bool active;
-    u8 byte;
-    u8 value;
-    u8 start_delay;
-} dma_context;
-
 static dma_context ctx;
 
 void dma_start(u8 start) {
@@ -37,4 +30,12 @@ void dma_tick() {
 
 bool dma_transferring() {
     return ctx.active;
+}
+
+void dma_save_state(dma_state* state) {
+    state->ctx = ctx;
+}
+
+void dma_load_state(const dma_state* state) {
+    ctx = state->ctx;
 }