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From: ekrimen@ecst.csuchico.edu (Ed Krimen)
Newsgroups: comp.sys.atari.st.tech
Subject: Re: STe Internals
Message-ID: <1991May15.055715.4021@ecst.csuchico.edu>
Date: 15 May 91 05:57:15 GMT
References: <13023@uhccux.uhcc.Hawaii.Edu>
Sender: news@ecst.csuchico.edu (USENET)
Organization: California State University, Chico
Lines: 31

In article <13023@uhccux.uhcc.Hawaii.Edu> kiki@uhunix1.uhcc.Hawaii.Edu (J. Wine) writes:
>fabricated in Japan.  The WD 1772 floppy controller is located under the disk
>drive (Sony drive w/ 5V only power input), so there is very little room for
>an alternate board to plug into the 28-pin socket.  The Yamaha sound chip is
>socketed for some reason, while the 2 TOS ROMs are soldered.  
>

Just to compare and contrast, when I opened up my STe to upgrade the RAM,
I noticed that I had an Epson drive and the 2 TOS ROMs were *socketed*, under
the drive.

>
>2) Reading/writing the area of memory between $400000 (end of 4MB DRAM memory)
>   and $CFFFFF causes a bus error, however addressing $D00000 (start of 13MB)
>   to $DFFFFF seems to be OK.  Is this memory protection specfic to the STe?
>   Although a local dealer claimed the new Mega STe has the same addressing
>   scheme, it would seem that it would support the entire 16MB space.  So can
>   anyone verify that the Mega STe uses a different MLUE and has an extended
>   addressing capability?
>

I read in one of the on-line magazines a couple of months ago that Jim Allen
had developed a 14meg upgrade for the STe and a 10meg upgrade for the MegaSTe.
I couldn't understand the difference, since I would expect the MegaSTe to
be able to be upgraded with more RAM, but I haven't heard anything since.
Perhaps these are related.
-- 
   |||   Ed Krimen [ekrimen@ecst.csuchico.edu or al661@cleveland.freenet.edu]
   |||   Video Production Major, California State University, Chico
  / | \  SysOp, Fuji BBS: 916-894-1261
         TWO WEEKS UNTIL GRADUATION!!