From: dmuntz@dip.eecs.umich.edu (Daniel A Muntz)
Subject: Archive tape driver
Organization: University of Michigan EECS Dept., Ann Arbor, MI
Date: Wed, 22 Jul 1992 01:47:30 GMT

The following is a first attempt at getting wt.c to drive an Archive
1/4" 60meg ct drive connected to an SC4xx (I have 400) qic36?? controller.
I'm doing this with a minimal amount of info about programming this controller,
so any information anyone might have would be appreciated.

Reading tapes seems to work fine with wt0 or rwt0, but writing only works
reliably with wt0.  Reading and writing are both intolerably slow (dma
is being done in 512-byte chunks and the drive takes a big pause at each
dma request).  The drive runs quickly (for 1/4" cartridge) under SCO, so great 
improvement should be possible.

*DON'T* install this in place of wt.c unless the only tape controller you want
to use is an Archive.  Later versions will be #ifdef'd, or probe to determine
drive type, but this version is hacked to only support the Archive controller.
Please send feedback to dmuntz@dip.eecs.umich.edu.


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end


Newsgroups: comp.unix.bsd