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