/* * The most fundamental constant. * The code will not compile with RBUFSIZE made a variable; * for one thing, RBUFSIZE determines FEPERBUF, which determines * the number of elements in a free-list-block array. */enum{	RBUFSIZE	= 8*1024,	/* raw buffer size */	MAXBANK	= 4,		/* discontiguous memory banks. */}; #include "../port/portdat.h" typedef struct{	ulong	d0;	ulong	d1;}Segdesc; typedef struct Mbank {	ulong	base;	ulong	limit;} Mbank; typedef struct Mconf {	Lock;	Mbank	bank[MAXBANK];	int	nbank;	ulong	topofmem;} Mconf; extern	Mach	mach0;extern	Mconf	mconf;extern	char	nvrfile[128];