Zenith 33 mhz .vs. TARGA 32

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2 total messages Started by Larry Bierma Tue, 27 Mar 1990 18:52

#144

Author: Larry Bierma
Date: Tue, 27 Mar 1990 18:52

20 lines
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I have a Zenith Z-386/33 system in which I am trying to run an AT&T
TARGA 32 video/graphics board.  The TARGA board doesn't seem to
like to bus.  The people at the AT&T Truevision group say that
the Zenith's bus is too fast (66.67 clock divided by 8 = 8.33 mhz,
the targa 32 maxes out at 8.1 (if hardware is tuned)).  AT&T's
suggestion is to buy a 25 mhz machine of buy a new AT&T VISTA
board which will work on the faster bus (both cost money which
I can't get).  Is there a way to slow down the bus speed on the
Zenith system without affecting CPU performance (too much).  I
can get things to work if I use the "machine speed slow" command
which inserts 15 wait states per instruction (inserting 10 wait
states does not work).  Of course then the system is no faster
than the 8 mhz AT it replaced.

Is there any way to slow down the bus? (No straps or switches exist
on the motherboard)

--Larry		ARPA: bierma@nprdc.navy.mil
		UUCP: ucsd!nprdc!bierma
		PSTN: (619) 553-7915

Zenith 183

#145

Author: Nicholas Leon Susch
Date: Wed, 28 Mar 1990 21:56

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1379 bytes

	I have a Zenith 183 pc (the laptop they made just before the
TurboSports came out). It is an 8086 (or 8088, I get thoes confused)
machine with 640K, a 20 Meg hard drive, and CGA graphics. What I would
like to know is, is there anyway to update this machine? All I found out
about it was that the memory expansion board to get 1 Meg would cost $500
because they don't make it any more. Does anyone know if I can get the
expansion board for cheeper? Also is there any Hard drive expansions, or
better yet, a video expansion to EGA or VGA? (It would have to use an
external monitor of course) Any help would be appreciated. Thanks.

Nicholas Susch - University of Rochester    "And when I have understanding
  nsus_cif@uhura.cc.rochester.edu	     of computers, I will be the 
  nsus_ltd@uordbv.bitnet		     supreme being!"
  !rochester!ur-cc!nsus_cif		                        - Evil

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