From mboxrd@z Thu Jan  1 00:00:00 1970
Date: Fri, 24 Nov 1995 03:48:04 -0500
From: forsyth@plan9.cs.york.ac.uk forsyth@plan9.cs.york.ac.uk
Subject: VGA Hell * 2 (Stealth 64 & Phantom 64)
Topicbox-Message-UUID: 36b1052e-eac8-11e9-9e20-41e7f4b1d025
Message-ID: <19951124084804.uB9hhHGb33r89br0C5nu-RRy3RvCyv0fJSS8O6Yv-tA@z>

>>tar file ok, however fs/tarfs gives a checksum error on the first
>>file.

try this:

vortex% diff /n/cd/sys/src/cmd/tapefs/tarfs.c .
132c132
< 		i += *cp;
---
> 		i += *cp & 0xFF;