Re: setting jumpers on GS memory board

[buggie@ben04.unm.edu (stephen e buggie)]

I use the one meg RAM boards A LOT!  There is an excellent RAM diagnostic
disk for this board, that will test and identify clearly the exact
locations of any bad RAM chips.

I'd suggest to fill all 24 of the sockets.   They use the "256" 16-pin ram
chips.  These are abundant and cheap; even from junked IBM carcasses.

If you dont have the 24 RAMs, I'd sell a complete set, pre-tested, for
$5.00 plus $3.20 for priority mail shipping.   The diagnostic disk is
included.  Photocopy of the ram board manual will be included if you say
you dont have the manual.

BTW, when the ram board is fully loaded, then BOTH JUMPERS must be
bridged.  I routinely solder the jumpers.  Ram is now so cheap, that every
RAM board should be fully filled with ram!

Steve Buggie


 **=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=**
 ** Stephen Buggie  UNM-Gallup,  200 College Road,      Gallup NM 87301 **
 ** buggie@unm.edu      IIgs/IIc/IIe  voice: (505) 863-2390 or 863-7504 **
 **   Apple ][ forever... just got back from my 10-year stint on MIR!   **
 **=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=**


 **=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=**
 ** Stephen Buggie,  Psychology,   Univ. of New Mexico, Gallup NM 87301 **
 ** buggie@unm.edu                  voice: (505) 863-7504  or  863-2390 **
 ** NEW MEXICO:   Indian pueblos, sunshine, atomic relics, white sands, **
 ** stealth jets, scenery, alien crash sites, and......... enchantment! **
 **=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=**







Robert Jensen (bob_jensen@jhuapl.edu) wrote:
: I recently acquired a ROM 01 GS. It includes a memory board that
: has 256 kb soldered on and 24 empty sockets. It also includes two
: jumper locations on the board toward the front of the machine.
: The jumper pins are not perpendicular to the board. The top pair
: make a right angle bend up and the bottom pair make a right angle
: bend down.

: I have no documentation and all I know about GSs comes from playing
: with the Bernie emulator.

: If I add more memory, do I need to configure the jumpers? The top
: row of memory is labeled A1 through A16 (1 through 8 are filled)
: and the bottom row is labeled B1 through B16. Does it matter where
: additional memory is placed if the board is not fully occupied?
: =========================================================
: Bob Jensen
: bob_jensen@jhuapl.edu