New find - OSI Challenger 4P

From: Robert Stek <r.stek_at_snet.net>
Date: Sat Oct 7 18:27:01 2000

Wheeee! I got an OSI Challenger 4P today (does this complete my collection
of early micros with walnut sides? I now have my Sol and NorthStar Horizon
and Challenger.) Of course it would be even better if it worked or at least
I had some documentation. A shielded cable terminating in an RCA phono plug
exits the cabinet. The fan turns and apparently something is being output.
I tried a mono composite monitor with no luck, but channel 11 (?) seems to
give what could be a screen image with several inverse video blocks
scattered down the left side (we have a STRONG channel 3 here, and 4 is
garbage). Pressing "return" shows no change in the screen, nor does
pressing a momentary-contact switch (home-brewed?) above the keyboard
labeled "Break Enable."

Since I never even saw one of these in the 70's, I could use some help.
Does anyone have docs they would be willing to copy for a reasonable fee?
Any other advice cheerfully accepted.

Bob Stek
Saver of Lost Sols
Received on Sat Oct 07 2000 - 18:27:01 BST