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From: ftegerer@faui09.informatik.uni-erlangen.de (Frohwalt Egerer)
Newsgroups: comp.sys.amiga.tech
Subject: Help on AT-Board needed
Keywords: Help, AT-Board
Message-ID: <ftegerer.663517808@faui09>
Date: 10 Jan 91 14:30:08 GMT
Sender: nntp@informatik.uni-erlangen.de (nntp@faui45)
Distribution: comp
Organization: University of Erlangen, Germany
Lines: 51

I got some serious problems with my AT emulator board. Some times it 
just works perfect, then another moment I get strange things:

  A: It just won't start up when the Binddrivers command in the start-
	 up-seqence is executed.   

  B: The AT-Board starts, but the Janus software is not transferred to
	 it, so the AT tries to boot from floppy, not from C:, which is a
	 PCdisk-file on my Amiga harddisk

  C: Same as B, but the CGA-Emulation loses characters: e.g. one 
	 message may be: ... blah Commodo e blah ...

  D: Everything works fine up to the moment when the AT tells me
	 that it got an parity error, and I shall press F1 to continue.

  E: Everything works for a day or two.

I have tried a lot of things to get it work: I exchanged the AT-Board
for a new one, I let all my drives work to check out if it was a too
wimpy power supply and now, I got the Amiga mother board of a friend
of mine.

Computer Configuration:

Amiga 2000, Supra Ram Board, 6M Siemens chips 100ns, 
AlfII Harddrive controller, Quantum 40s, Seagate SCSI 80M drive (I think
it is a 296S), AT-Board (of course)

I got the problems with two versions of AT-Boards, the first had got an
external lithium battery, the second seems to have it on board. (It has
quite a large chip with a clock printed on it)

The Amiga motherboards I tried are Rev4 (not updated with fatter agnus)
and Rev6 boards.


Btw, does anyone out there have docs on the jumpers of the AT-Board?
Perhaps one could tell me how to install a little beeper to it? (I
know - just plug one in - but WHERE)

I think Commodore once again has shown how to make bad manuals - The
AT-Board manual has won my personal price of the worst manual I got
in 1990! ;-)


--
.. and see, people of the world when the day will come when professional
'home'  computers  get more professional than improfessional professional
computers.                     ftegerer@faui09.informatik.uni-erlangen.de
Mr. Somehow++ Strange                        ONLY AMIGA MAKES IT POSSIBLE