/* normally defined in ../port/portdat.h */
#define ROUND(s, sz) (((s)+(sz-1))&~(sz-1))
#define PGROUND(s) ROUNDUP(s, BY2PG)
#define HOWMANY(x, y) (((x)+((y)-1))/(y))
#define ROUNDUP(x, y) (HOWMANY((x), (y))*(y)) /* ceiling */
void cgainit(void);
void cgaputc(int);
int inb(int);
void outb(int, int);
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