Re: HP 28c Memory Hack? Message #2 Posted by Kim Holm on 10 Mar 2003, 3:35 p.m., in response to message #1 by John K. Mes
This is a tough one.
I made the hack with the help of a fellow on this page Wlodeck.
I removed the adhesive overlay on the right half kbd and
drilled the heatstake pins. THATS THE EASY PART.
then I found a CMT 32Kb memory module and with the help of Wlodeck found the relevant pads for nibble, daisy in and out and power.
Then assemble heatstake reflow and done.
Iøm sure that comp.sys.hp28 has a description from
about 1986-87.
best regards
Kim
|