| 1040ST Upgrade [message #283045] |
Fri, 14 March 1986 10:22  |
john
Messages: 294
Registered: February 2013
Karma: 0
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Senior Member |
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<pre>
Article-I.D.: anasazi.648
Posted: Fri Mar 14 10:22:20 1986
Date-Received: Mon, 17-Mar-86 03:33:49 EST
Reply-To: john@anasazi.UUCP (John Moore)
Organization: Anasazi, Phoenix Az.
Lines: 17
I have heard that you can upgrade a 1040ST to 4 Meg by swapping the
256K RAM's out and putting in 1 Meg RAM chips. Anyone know if this is true?
Also, is there any difference in external expansion connections on the
1040 vs the 520?
--
John Moore (NJ7E/XE1HDO)
{decvax|ihnp4|hao}!noao!terak!anasazi!john
{hao!noao|decvax|ihnp4|seismo}!terak!anasazi!john
terak!anasazi!john@SEISMO.CSS.GOV
(602) 861-7607 (day or evening)
7525 Clearwater Pkwy, Paradise Valley, AZ, 85253 (Home Address)
The opinions expressed here are obviously not mine, so they must be
someone else's.
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| Re: 1040ST Upgrade [message #283052 is a reply to message #283045] |
Sat, 15 March 1986 10:58  |
john
Messages: 294
Registered: February 2013
Karma: 0
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Senior Member |
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<pre>
Article-I.D.: anasazi.650
Posted: Sat Mar 15 10:58:58 1986
Date-Received: Mon, 17-Mar-86 04:48:13 EST
References: <648@anasazi.UUCP>
Reply-To: john@anasazi.UUCP (John Moore)
Organization: Anasazi, Phoenix Az.
Lines: 21
In article <648@anasazi.UUCP> john@anasazi.UUCP (John Moore) writes:
> I have heard that you can upgrade a 1040ST to 4 Meg by swapping the
> 256K RAM's out and putting in 1 Meg RAM chips. Anyone know if this is true?
To answer my own question, it is true according to the interview in
Byte magazine, so I'll post another question:
The upgrade of the 1040ST to 4 meg involves swapping the 256K RAM's
to 1 Meg. The 1 Megs have two more pins which the article said could
be bent out. DO they need to be connected to something (like more
address lines)?. Also, is there any reason this same trick cannot be
done with a 520 (using piggybacked 1 Meg chips)?
--
John Moore (NJ7E/XE1HDO)
{decvax|ihnp4|hao}!noao!terak!anasazi!john
{hao!noao|decvax|ihnp4|seismo}!terak!anasazi!john
terak!anasazi!john@SEISMO.CSS.GOV
(602) 861-7607 (day or evening)
7525 Clearwater Pkwy, Paradise Valley, AZ, 85253 (Home Address)
The opinions expressed here are obviously not mine, so they must be
someone else's.
</pre>
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