1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/src/io.h	Wed Jun 21 06:32:10 2017 +0300
     1.3 @@ -0,0 +1,13 @@
     1.4 +#ifndef MEGADRIVE_IO_H_
     1.5 +#define MEGADRIVE_IO_H_
     1.6 +
     1.7 +#define IO_REG_VER	*((volatile uint8_t*)0xa10001)
     1.8 +
     1.9 +enum {
    1.10 +	IO_VER_VERSION_MASK = 0x0f,
    1.11 +	IO_VER_EXP		= 0x20,
    1.12 +	IO_VER_PAL		= 0x40,
    1.13 +	IO_VER_NONJP	= 0x80
    1.14 +};
    1.15 +
    1.16 +#endif	/* MEGADRIVE_IO_H_ */