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From: jim@umcp-cs.UUCP (Jim Williams)
Newsgroups: net.micro.pc
Subject: PCjr questions
Message-ID: <2622@umcp-cs.UUCP>
Date: Sun, 22-Dec-85 11:18:09 EST
Article-I.D.: umcp-cs.2622
Posted: Sun Dec 22 11:18:09 1985
Date-Received: Wed, 25-Dec-85 01:00:16 EST
Distribution: net
Organization: U of Maryland, Computer Science Dept., College Park, MD
Lines: 30


	I am helping some friends who have a PCjr and who want to
upgrade it some.  They have a jr with a disk drive, an extra 64K
RAM card (total 128K) and an outboard parallel port.  They want to
add a second drive, more memory, and connect the serial port to the
an external modem.  To help them with this I need to know a few
things that aren't in the documentation.  Here's my list:

1. What is the pin-out of the 16-pin header connector for the
   serial port?  I need to make a cable to go from that to a
   DB25 connector.

2. The internal drive has its drive select jumper on 1, not 0!
   If I add a second drive, how do I address it? As drive 2? 3?
   0?

3. What is the best route for memory expansion? Tecmar? Conroy-
   LaPointe is one of the few mail-order places I have found that
   still advertizes PCjr stuff.  Anybody dealt with these people?
   I advised my friends that the best thing to do would be to
   replace the existing 64K card with a larger one rather that go
   to an expansion chassis just to get the slots for extra
   memory, because the chassis are so expansive.

Much thanks to any and all who can help me!
Reply by mail to..

Jim \/\/illiams
jim@maryland.ARPA
seismo!umcp-cs!jim.UUCP