Start on FILE i/O

inc/file.h

@@ -0,0 +1,17 @@
+#ifndef FILE_H
+#define FILE_H
+
+#define COMMAND_OPEN 1
+#define COMMAND_CLOSE 2
+#define COMMAND_SELECT_IN 3
+#define COMMAND_SELECT_OUT 4
+#define COMMAND_READ 5
+#define COMMAND_WRITE 6
+#define COMMAND_RESET 7
+
+int openFile(int fd, const char *path);
+int closeFile(int fd);
+int readByte(const int fd, int *data);
+int writeByte(const int fd, const int data);
+
+#endif // FILE_H

inc/io.h

@@ -9,8 +9,9 @@
 #define SCREEN_ADDRESS 0
 #define KEYBOARD_ADDRESS 1
 #define ROM_BANKED_OUT 2
-
-int putChar(uint8_t c);
-int getChar(void);
+#define FILE_COMMAND 3
+#define FILE_DESCRIPTOR 4
+#define FILE_DATA 5 // two bytes, for pointer to string
+#define FILE_STATUS 7
 
 #endif // IO_H

inc/memory.h

@@ -1,11 +1,13 @@
-#ifndef MEMORY_MAP_H
-#define MEMORY_MAP_H
+#ifndef MEMORY_H
+#define MEMORY_H
 
 #include <stdint.h>
 
+#include "file.h"
 #include "io.h"
 #include "ram.h"
 #include "rom.h"
+#include "screen.h"
 
 uint8_t readMemory(uint16_t address, uint8_t *ram, uint8_t *rom);
 void writeMemory(uint16_t address, uint8_t value, uint8_t *ram);
@@ -13,4 +15,4 @@ void writeMemory(uint16_t address, uint8_t value, uint8_t *ram);
 uint8_t readStack(uint8_t address, uint8_t *ram);
 void writeStack(uint8_t address, uint8_t value, uint8_t *ram);
 
-#endif // MEMORY_MAP_H
+#endif // MEMORY_H

inc/screen.h

@@ -0,0 +1,9 @@
+#ifndef SCREEN_H
+#define SCREEN_H
+
+#include <stdint.h>
+
+int putChar(uint8_t c);
+int getChar(void);
+
+#endif // SCREEN_H