> > > Mine was a DEC MSV11 w/128Kbytes installed, solder filling the holes > for the other half of the memory positions. I did not have problems > with traces lifting from that board (I was using an adjustable Weller > soldering station and had fine control over the temperature). > Installing the DIPs went fine but the first test was not successful - > the new memory did not appear. Quick inspection and a few bad solder > joints found and reflowed, and two more cycles of that and I had my > 256Mbytess. >
Speaking of such modifications. Many, many years ago I modified a M8044 / MSV11-D board. Removing all the 16 k chips. Replacing those with desoldered 64k chips. Burning a new address decoding PROM. One wire had to go on top of the chips since the extra address pin used to be a supply pin of the 16k chips. It worked after a few iterations. And it actually still works. http://i.imgur.com/miyVaHC.png
