Here are the parts needed to build the pokey printer port interface circuit.

Parts except where noted are from a JDR catalog.  Prices do change so don't
hold me to these prices.

Quantity        Description             JDR Part Number         Price
--------        ---------------         ---------------         --------
2               74HC574                 74HC574                 $ 0.79

1               1.8432 Mhz TTL
                Level Osciallator       OSC1.8432               $ 2.79

1               25 pin D-Sub Connector  
                Right Angle             DB25SC                  $ 0.89

1               Atari Pokey Sound Chip
                                        C2294*                  $ 3.50
                                        C012294**               $ 5.00

1               1K Ohm Resistor         R1.0K                   $ 0.05

1***            1/4 Mini Jack Mono Plug M14P                    $ 0.79

1****           4.5 X 6.5 inch
                breadboard              JDR-BB65                $ 3.95

*     This is the price quoted from B&C Computer vision

**    This is the price quoted from Best Electronics

***   I believe this is the same jack as the back of your
      IBM sound card. You then take a simple 1/4 plug (on
      both ends) and plug it into the pokey device and then
      into your line in on your sound card, or your stereo.

****  This is more breadboard than you will need, if you can find
      some place that sells smaller boards go for it.

Some other things you might need.

Power Supply.  There is no power available on the printerport.  You
need to get a +5 volt regulated supply.  You can get these at radio
shack, JDR, etc.  If your inventive you could steal it from your
Joystick connector on your PC.  Take your supply and either put some
type of connector on the board, or just place the +5 volt line of your
supply to the circuit board and connect to your +5 line somewhere in the
circuit.  Do the same with your GND line on the power supply and connect
it to one of the GND signals on the circuit.  Make sure you get this correct.
Don't wire them backwards.  If you put your volt meter on the power supply
wires directly and read +5 volts, then the wire your RED volt meter lead is
on is your +5 volt line and the other is ground.  Don't use a 6 volt power
supply or anything besides +5 for that matter.  If you do make sure you
put a +5 volt regulator on it.

Case.  If you want to be fancy I would get a small case to put it in.

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If after reading this you are scared about doing the circuit you should stop
and have a more electronically inclined friend do it.

See the readme.now file for info on a possible PC card slot version of this
I might have made.  This would fit in your PC and not require an external
power supply, no printer port.  And be faster for the emulators to use.

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Phone Numbers.

JDR MicroDevices
1-800-538-5000
http://www.jdr.com

Best Electronics
2021 The Alemeda
Suite 290
San Jose, California 95126
408-243-6950

B&C Computer Visions
1725 De La Cruz Blvd. #7
Santa Clara, CA 95050
408-986-9960
