1 files changed, 26 insertions, 0 deletions
diff --git a/cpu.h b/cpu.h
index ed17432..05c30fa 100644
--- a/cpu.h
+++ b/cpu.h
@@ -1,5 +1,29 @@
+#ifndef CPU_H
+#define CPU_H
+
 #include <stdint.h>
 
+struct cpu_flags {
+	uint8_t carry : 1;
+	uint8_t zero : 1;
+	uint8_t interrupt_disable : 1;
+	uint8_t decimal_mode : 1;
+	uint8_t brk : 1;
+	uint8_t unused : 1;
+	uint8_t overflow : 1;
+	uint8_t negative : 1;
+};
+
+struct registers {
+	uint8_t a, x, y, sp;
+	struct cpu_flags status;
+	uint16_t pc;
+};
+struct registers regs = {0};
+
+/* 64K address space, 16bit words */
+uint8_t memory[0x16000];
+
 /* OFFICIAL OPCODES */
 void ADC(uint16_t arg);
 void AND(uint16_t arg);
@@ -87,3 +111,5 @@ void SYA(uint16_t arg);
 void TOP(uint16_t arg);
 void XAA(uint16_t arg);
 void XAS(uint16_t arg);
+
+#endif	/* CPU_H */