Summary: 4/110 RAM-expansion

From: Thomas Weihrich (Thomas.Weihrich@arbi.informatik.uni-oldenburg.de)
Date: Sun Oct 27 1991 - 20:45:52 CST


Hi everybody !

The net was FAST this time !

Thanks to:
Ric Anderson <ric@cs.arizona.edu>
diab jerius <dj@astro.lsa.umich.edu>
(I include his post, as it describes the fastest way to get going)
Liam R. E. Quin <lee@sqlee.sq.com>

and here comes the summary:

here's a summary from Marcel Bernards (bernards%ecn.nl@pucc.PRINCETON.EDU)

---------- Begin Forwarded Message ----------

You put in 1 Mb simm's in banks of 16 in the first section an change the jumper
info. I send you this very clear summary

I give you the correct jumper info From:
 "(Alain Brossard EPFL-SIC/SII)" <brossard@sasun1.epfl.ch>
Very nice explanation.

---BEGIN---Cut-Here----8<----8<----8<----8<----8<----8<----8<----8<----8<----

 __HHHHHHHH___HHHHHHHH___HHHHHHHH__
| |
| ________ ________ |
| | | | | |
| | 3 | | 4 | |
| | 8x256k | | 8x1 meg| J400 1- |
| -------- -------- 3- |
| ________ ________ |
| | | | | J1300 |
| | 1 | | 2 | |
| | 8x256k | | 8x1 meg| J1400 |
| -------- -------- |
| |
| J101 1-2 |
| J100 1-2 |
| 3-4 |

   Here are the configurations:

J100
Memory Size 8MB 16MB 20MB 32MB
  SIMM size 256K 1MB 1MB/256K 1MB
J100
  Pin 1-2 In Out In Out
  Pin 3-4 Out In Out In

J400
  Pin 1-2 Out In Out In
  Pin 3-4 In Out Out In
  Pin 5-6 In In In Out

J1300
Same In Out Out In
Different Out In In Out
256K In Out In Out
1 M Out In Out In
2 M Out Out Out Out
< 32M In In In Out
32M Out Out Out In
Unused Out Out Out Out

J1400
Same In Out Out In
Different Out In In Out
256K In Out Out Out
1 M Out In In In
2 M Out Out Out Out
< 32M In In In Out
32M Out Out Out In
Unused Out Out Out Out

   Assuming I didn't make a mistake transcribing, this works.

--

Alain Brossard, Ecole Polytechnique Federale de Lausanne, SIC/SII, EL-Ecublens, CH-1015 Lausanne, Suisse brossard@sasun1.epfl.ch

---END-----Cut-Here----8<----8<----8<----8<----8<----8<----8<----8<----8<----

Marcel Bernards, UNIX & Net sysadm Netherlands Energy Research Foundation ECN (and SURFnet IP/ICP), Phone: (+31 /0)2246 4579 Fax: (+31 /0)2246 1864 E-Mail: Bernards@ECN.NL, SnailMail: P.O. Box 1, 1755 ZG Petten SCREAMNet : AAAAAARGHH!HUH?? : Disclaimer: "The AntiChrist is the Computer !" ----------- End Forwarded Message -----------

diab jerius university of michigan internet: dj@astro.lsa.umich.edu department of astronomy voice: (313) 764-3440 ann arbor, mi 48109

The eeprom settings can be changed to test the full 20 Mbytes, after these have been successfully installed. I did not perform this step, due to the fact that I was just too lazy.

Thanks again for responding this fast (about 30 mins).

Thomas Weihrich



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