To restore or not to restore...

From: John R. Keys Jr. <>
Date: Thu Apr 2 16:27:40 1998

Around here 128k's get trashed all the you should be able to find one for
free to $20 and save yourself alot of work with the one you have.
At 06:25 PM 4/2/98 +1000, you wrote:
>I collect home micros, and I recently acquired a Mac 128K. However, it's
>been quite heavily modified with contemporary third-party add-ons. It's
>been taken up to 1M RAM and it's had a SCSI interface installed.
>The memory has been taken up to 512K by removing the 64K x 1 bit RAM chips
>and replacing them with 256K x 1 bit chips, plus adding a few discrete
>components (not hard, considering the 128K and 512K Macs shared the same PC
>board). It has then been taken up to 1M by adding a third-party 512K RAM
>expansion board, which plugs into one of the RAM sockets (the chip it
>displaces being installed onto the expansion board), and is connected to
>the address decoding by several flying leads.
>The SCSI interface has been installed by removing the ROM chips, plugging a
>daughterboard into the empty ROM sockets, and plugging the ROM chips into
>the daughterboard. The SCSI socket replaces the cover over the battery in
>the back of the Mac.
>So, my question is, should I:
>1) Leave it as it is;
>2) Remove the SCSI interface (easy, just remove the daughter board, take the
> ROM chips out of it and put them back into the motherboard's ROM sockets);
>3) Remove the SCSI interface *and* the 512K RAM daughter board (not *too*
> desolder the flying leads (taking note of where they go to, just in
case I
> want to reinstall the board), remove the board from the RAM chip's socket,
> remove the RAM chip from the daughterboard and put it back in the
> motherboard's now-empty RAM socket);
>4) Take it back to original condition (quite difficult, as well as
> steps 1)and 2) it involves desoldering 16 256K x 1 bit RAM chips, (plus
> few discrete components) and soldering in 16 64K x 1 bit RAM chips).
>What are people's opinions on this?
>| Scott McLauchlan |E-Mail:|
>|Administration IT User Support Team|Phone: +61 2 6201 5544 (Ext.5544)|
>| Client Services Division |Post: University of Canberra, |
>| University of Canberra, AUSTRALIA | ACT, 2601, AUSTRALIA. |
Received on Thu Apr 02 1998 - 16:27:40 BST

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