1 files changed, 35 insertions, 1 deletions
diff --git a/src/emu/mem.c b/src/emu/mem.c
index e102eaf..cdbf2ae 100644
--- a/src/emu/mem.c
+++ b/src/emu/mem.c
@@ -1,3 +1,37 @@
+#include <stdint.h>
+#include <sys/types.h>
+#include <string.h>
+
+#include "cpu.h"
 #include "mem.h"
 
-uint8_t MEM[4096];
+uint8_t *MEM;
+
+void store(size_t addr, uint32_t value)
+{
+	if (addr & 0x2)
+		trap(TRP_UNALIGNED);
+	memcpy(&MEM[addr], &value, 4);
+}
+
+uint32_t load(size_t addr)
+{
+	uint32_t tmp32;
+	if (addr & 0x2)
+		trap(TRP_UNALIGNED);
+	memcpy(&tmp32, &MEM[addr], 4);
+	return tmp32;
+}
+
+void push(uint32_t value)
+{
+	GPR[SP] -= 4;
+	store(GPR[SP], value);
+}
+
+uint32_t pop(void)
+{
+	uint32_t tmp32 = load(GPR[SP]);
+	GPR[SP] += 4;
+	return tmp32;
+}