Generalized the 93C66 EEPROM emulation to other capacities, and add 16-bit word size support. Update mapper 529 to use 93C56 EEPROM in 16-bit mode.

src/boards/eeprom_93Cx6.h

@@ -0,0 +1,10 @@
+#ifndef _EEPROM_93CX6_H
+#define _EEPROM_93CX6_H
+#include "mapinc.h"
+
+extern uint8* eeprom_93Cx6_storage;
+
+void  eeprom_93Cx6_init  (size_t capacity, uint8 wordSize);
+uint8 eeprom_93Cx6_read  ();
+void  eeprom_93Cx6_write (uint8 CS, uint8 CLK, uint8 DAT);
+#endif