gmv@cblpe.UUCP (Mike Vrbanac) (09/08/86)
Here is how to get your PLUS up to three, five or seven megabytes
of memory using AT&T's "Enhanced Memory Expansion Boards".
First, if you haven't already, install 256k chips on the motherboard
to bring it up to 1meg. Plug in the chips and change motherboard
SW2 positions 1 thru 4 from on-on-on-off to off-off-on-off.
Second, install the xtra 256k chips on the memory expansion board(s)
to bring it/them up to 2 meg.
Third, make sure the JP1 jumper on each memory card is set for the PLUS.
Fourth, set the dip swtches on the FIRST memory board as follows:
+------------------------+ +------------------------+
on | x x x x x x | on | x x x |
SW1 | | SW2 | |
off | x x | off | x x x x x |
+------------------------+ +------------------------+
1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8
Fifth, install this card in the slot on the left (closest to the video
board, reboot and make sure all is well.
Sixth, set the dip swtches on the SECOND memory board as follows:
+------------------------+ +------------------------+
on | x x x x x | on | x x x |
SW1 | | SW2 | |
off | x x x | off | x x x x x |
+------------------------+ +------------------------+
1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8
Seventh, install this card next to the first memory board,
reboot and make sure all is well.
Eighth, set the dip swtches on the THIRD memory board as follows:
+------------------------+ +------------------------+
on | x x x x x | on | x x |
SW1 | | SW2 | |
off | x x x | off | x x x x x x |
+------------------------+ +------------------------+
1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8
Nineth, install this card next to the second memory board,
reboot and make sure all is well.
Notes: -UNIX will recognize the memory automatically.
-Currently the PLUS has three 16-bit slots, which limits it to
7 megabytes, 5 megabytes if you have a DEB board.
-To configure some "paged" memory for DOS to use, on the *last*
memory expansion board set SW2 positions 5 thru 8 to be something
less than 2048k. The difference will be available to DOS as
"paged" memory (whether native DOS or DOS under Simu-Task).
--
+--------------+------------------------+-----------------+
| Mike Vrbanac | AT&T Bell Laboratories | Columbus, Ahiya |
+--------------+------------------+-----------------------+
| Unix: {cbosgd|ihnp4}!cblpe!gmv | CompuServ: 76054,113 |
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