Aucbvax.5399
net.2bsd-bugs
utzoo!decvax!ucbvax!dist2
Sun Dec  6 03:21:11 1981
FIXED:  the ecc algorithm in kernel/sys/dev/hp.c
	The ecc algorithm in hpecc() is not correct.  The corrections
needed are:

	diff kernel/sys/dev/hp.c.old kernel/sys/dev/hp.c
	434a435
	>     ocmd = (rp->hpcs1.w&~DRY)|IE|GO;
	450c451
	b_bcount && wrong!=0 )
	---
	> 	while( 0<=BYTE BYTE<BP- &&>b_bcount && (wrong<<=BIT)!=0 ) < 462D462 464C464 PUTMEMC(ADDR,GETMEMC(ADDR)^WRONG); WRONG --- <<="bit;"> 	    putmemc(addr,getmemc(addr)^(int)wrong);
	469a470,471
	>     /*getmemc() changes pri.  might be a race.*/
	>     spl5();
	479d480
	hpcs1.w&~DRY)|IE|GO;


The changes are necessary on tapes written before 12/5/81.

			Carl

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