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From: hammock@mars.jpl.nasa.gov (Randy Hammock)
Newsgroups: comp.sys.amiga
Subject: Re: 2090 and 2090a
Message-ID: <2445@jato.Jpl.Nasa.Gov>
Date: 22 Dec 89 04:23:21 GMT
References: <6661@nigel.udel.EDU>
Sender: news@jato.Jpl.Nasa.Gov
Reply-To: hammock@mars.UUCP (Randy Hammock)
Organization: Jet Propulsion Laboratory, Pasadena, CA.
Lines: 21

In article <6661@nigel.udel.EDU> casebolt%esdc.span@fedex.msfc.nasa.gov writes:
>		What is the difference in the 2090 vs the 2090a. 
>			BOOT ROMS only??
That is the major difference.  There is a slight difference in the driver code
the was a fix for screen glitches caused when the disk is accessed while an
overscanned screen is in use.

>I told him I thought it was a boot rom only difference... anyone has any 
>other differences and if the difference is the rom set...I one were to replace
>the roms with a new set from a 2090a would it make the system auto bootable??

There are some hardware differences between the 2090 and the 2090a.  In fact,
there was talk at one time of a daughter board being produced for the 2090 to
convert into a 2090a (or at least compatable).  Another thing that is required 
for AUTOBOOT is the presence of 1.3 Kickstart ROMs.  The system will not
AUTOBOOT, even with a 2090a, without the 1.3 (or later) ROMs being installed 
in the system.
AMIGA /// |   randy@jato.jpl.nasa.gov  Telos - Jet Propulsion Laboratory - NASA
     ///  | hammock@mars.jpl.nasa.gov     ** GALILEO launch October 1989 **
 \\\///   |--------------------------------------------------------------------
  \XX/    | "If I wanted your opinions, I'd have given them to you!" - Mock