Bung Doctor PCjr Controller Information

v0.1 (June 8, 2001)
Bryan Wall
TheEmperor@japan.com

This document was created as a result of my frustration with the poor
controllers that come with the Bung Doctor PCjr, and the lack of
documentation of the PCjr hardware.  I wanted to be able to use readily
available (and higher quality) NES controllers.  I wasn't sure when I began
if the PCjr was electrically compatible with the NES controllers, or if
controllers using the extra data lines of the NES controller interface
would work.

I started by disassembling my PCjr and traced the controller port
motherboard connectors in an effort to figure out which pins were used for
which functions.  I was able to clearly identify the main pins, and got the
standard controllers working.  Then, using trial and error and a NES
Arkanoid controller I bought specifically for the purpose, I found that the
additional data lines were available on the PCjr, and was able to get the
advanced controllers working.  I ended up buying some NES controller
extension cables (which are in 2001 somewhat rare and expensive; if anyone
knows of an inexpensive source of NES extension cables or female controller
plugs, please contact me.) which I sacrificed to get some female NES
connectors.  Using these female connectors, I wired up a reusable 9 pin NES
-> 15 pin converter so that I could plug in any NES controller without
having to hack up and add a 15 pin connector to each NES controller I
wanted to use.

Using the information below, you should be able to use NES controllers with
your PCjr, or vice versa (Basic soldering skills and equipment
recommended).  This may be the same configuration as other 15 pin Famicom
controllers, or the Famicom itself, but I have no way to verify this.  If
you find any other use for this information, please let me know.  If you
can't find female NES connectors (or don't want to pay for them), it would
be simple enough to cut the end off an NES controller, and add a 15 pin D
connector.

Please contact me if you have any suggestions, or find any errors in this
document.  I would also be interested in hearing from anyone that finds
this document useful.


--------------------------------------

Doctor PCjr Controller (Female)

  8     5 4     1
  |     | |     |
-------------------
\ o x x o o x x o /
 \ o x x o x x o /
   -------------
   |     |     |
   15    12    9

1  = Ground
4  = Data 4
5  = Data 3
8  = Data 0
9  = Clock
12 = Latch
15 = Power

--------------------------------------

Nes Controller

  5 6 7
+-------\
| o o o  \
| o o o o |
+---------+
  4 3 2 1

1 = Ground
2 = Clock
3 = Latch
4 = Data 0
5 = Data 4
6 = Data 3
7 = Power

* Data 3 & 4 are not used for standard controllers.  These are used for
special controllers such as the Zapper, Arkanoid controller, etc.*