usenet@cps3xx.UUCP (Usenet file owner) (09/14/89)
Someone asked about the modification for the UCI Eazy-87 board for the
Z-100. I installed this board and did the modification a couple of years
ago. My Z-100 is a low profile, 768K, running at 8 Mhz.
The symptom is that the Z-100 locks up erratically when the Eazy-87 is
installed. The cure is to install a 100 pF, 50 V Ceramic capacitor across
a couple of pins where the ribbon cable connects to the Eazy-87 board.
This modification was provided by one of the technicians at UCI. I've had
not had any lock up problems since I installed it. See the diagram below:
-----------------------------------------------------------
| . . |
| .\ . |
----------| . \ . Connect the 100 pF 50V Foil side |
| . )| \ . ceramic between the 1st of circuit |
| . \. pin on the left row and board |
| . . the 5th pin on the right row. |
Ribbon | . . |
cable | . . The leads can be "tacked" to the |
| . . pins with a small amount of solder. |
| . . |
| . . |
----------| . . |
| . . |
| (more pins than this) |
----------------------------------------------------------
Mark Urban-Lurain urban@cpswh.cps.msu.edu
Computer Science Dept. urbanluraimg@clvax1.cl.msu.edu
Michigan State University
A-714 Wells Hall (517) 353-0682 office
East Lansing, MI 48824 (517) 355-5210 department