Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!sharkey!aucis!easton
From: easton@aucis.UUCP (Jeff Easton)
Newsgroups: comp.sys.amiga
Subject: Re: 1.4 ROMS?
Summary: forget it, bizzare ROM's used
Message-ID: <460@aucis.UUCP>
Date: 18 Jul 89 23:59:31 GMT
References: <469@uncmed.med.unc.edu> <19974@louie.udel.EDU> <19975@louie.udel.EDU>
Organization: Andrews University, Berrien Springs, MI
Lines: 36

In article <19975@louie.udel.EDU>, new@udel.EDU (Darren New) writes:
> It also seems to me that under US Copyright law as I understand it,
> it sould be legal to burn your own proms from the kickstart that
> comes with the enhancer set, thereby saving $35 (or whatever) for
> all the poor slobs stuck with kickstart in ROM (1/2 :-).  It seems
> that this would be "fair use" and an "essential part of using the
> software on the computer."  (Just thought I would start another 
> copyright war.)     -- Darren


  I looked at this once (when 1.3 came out) and found it to be
near impossible to do economically.

  First I whipped out my copy of the A500/A2000 technical reference
manual and checked the schematic.  Hmm 128K x 16 ROM, P/N HN62402.
Sounds like a Hitachi part.  A quick scan of my Hitachi data book shows
no such part.  OK, check the pinout with the Intel standard part.
Bingo! there all WRONG!  The Intel (JEDEC?) standard has all the data pins
on one side and all the address pins on the other.  The B2000 schematic
shows all the data pins on the bottom half of the chip and all address
pins on the top half.  I think I even checked my mother board and it
seemed to match the B2000 schematic.

  I posted a question about this many months ago but got no replys.
  So how 'bout it guys? CATS? Dave?  Why the weird part?  To combat
theft?  Or were you just to early (before the x16 standard was set)?

  A daughter board could be devised to remap the pinout to a standard
for those inclined to mess with kickstart (noclick in ROM, etc) but
just wasnt worth it to me at the time.

  I would build one at the drop of a hat if I could kludge in some 
code to get my old A2090 to autoboot. :<

Jeff Easton		UUCP: !mailrus!sharkey!aucis!easton
Zenith Data Systems	OEM Engineering.