Help needed with mixed 1 and 4 MB SIMMS

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2 total messages Started by Alex Woo RAA Thu, 13 Aug 1992 22:14

#2070

Author: Alex Woo RAA
Date: Thu, 13 Aug 1992 22:14

20 lines
1493 bytes

According to the FAQ, it appeared that I could upgrade my
25MHz NeXTStation by replacing banks 0-3 of SAMSUNG KMM581000A-10
SIMMS with Goldstar 4x8 60ns SIMMS.  Unfortunately, my
machine doesn't recognize these and reports mixed memory
and then claims that banks 0-3 are unpopulated.  Any clues?

Would it work if I removed the rest of the SAMSUNG's and used
memory which was all 60ns.  Seems strange that the memory won't
respond to the slower refresh rate.

Alex
========================================================================
Alex Woo, MS 227-6                         woo@ames.arc.nasa.gov
NASA Ames Research Center           __o    NASAMAIL      ACWOO
Moffett Field, CA 94035-1000       -\<,    SPANET        24582::WOO
(415) 604-6010 (FAX) 604-4357 .....O/ O   {hplabs,decwrl,uunet}!ames!woo
========================================================================
Disclaimer: These comments are not official statements of NASA or EMCC.
========================================================================

Re: Help needed with mixed 1 and 4 MB SIMMS

#2077

Author: Alex Woo RAA
Date: Fri, 14 Aug 1992 00:07

18 lines
1405 bytes

Sorry for posting before a careful inspection of the
new SIMMs.  One of the Goldstar 4MB SIMMS had a metal
burr soldered over two connectors where the parity
chip would normally be located.  I am returning all
of these SIMMs to the Chip Mercant in San Diego.

Do Macs totally ignore the parity lines and therefore
this defect wasn't detected?

Alex
========================================================================
Alex Woo, MS 227-6                         woo@ames.arc.nasa.gov
NASA Ames Research Center           __o    NASAMAIL      ACWOO
Moffett Field, CA 94035-1000       -\<,    SPANET        24582::WOO
(415) 604-6010 (FAX) 604-4357 .....O/ O   {hplabs,decwrl,uunet}!ames!woo
========================================================================
Disclaimer: These comments are not official statements of NASA or EMCC.
========================================================================

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