Path: utzoo!utgpu!water!watmath!221.162.fido!Geoffrey_Welsh
From: 221.162.fido!Geoffrey_Welsh@watmath.waterloo.edu
Newsgroups: comp.sys.cbm
Subject: Re: Info needed on HD46506 chip ( 80 col PET video CRTC)
Message-ID: <17260@watmath.waterloo.edu>
Date: 2 Mar 88 14:15:15 GMT
Sender: ugate@watmath.waterloo.edu
Lines: 22


 > From: erd@tut.cis.ohio-state.edu (Ethan R. Dicks)
 > Message-ID: <7386@tut.cis.ohio-state.edu>
 > Date: 29 Feb 88 04:22:23 GMT
 > I am doing a project with a PET 8032 as a slave terminal over the IEEE-488
 > bus and need to cut my own boot ROM. I got this used 8032 in a clearance
 > from Battelle Memorial Institute surplus, with no documentation. I need
 > an explanation of the CRT controller chip so I can implement my own
 > $F000 rom to do what I need it to, and not start up PET BASIC
 
Ethan:
 
   The CRT controller in the PET "fat" 4016/32, CBM 8016/32, CBM 8096 
and SP9000 was just a Motorola MC6845 (the same device used by IBM MDA and
CGA cards, I believe). Contact Motorola for chip specs and application notes.
 
   The settings in the PET's ROMs are a good place to start.
 
   Geoff ( watmath!fido!221.171!izot )

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