CHOLESTEROL FREE
PARRALLEL PORT
EPROM PROGRAMMER

- Programms 2764 to 27512 (ADAPTOR FOR 2716/32 AND SOME MICROS)
- Fast or Slow Programming
- Easy to Assemble
- Self Diagnosing
- Inexpensive to Build
- Easy to Obtain Parts (Australia)
- Full Schematics, PCB and Overlay
- Free Software
- C Source Code Supplied
- Easy Enough for a 5 year old tibetan spaniel to build

RTFM Instructions

The following instructions are designed for people with little
construction experience.  If you are finding them more than
just a little tedious I would suggest reading the diet
instructions in the file INS_KISS.TXT.

Assembly.

Tip #1 Get a good soldering iron there are lots of closely
       spaced pins.  You are probably wasting your time
       with a chunky plumblers iron.
Tip #2 Make sure you have a Multimeter, Voltmeter, Multitester
       or 1Gs real time scope before starting.  You realy do
       need one to adjust the voltage at the end of it all.
Tip #3 Check all components are in the right place/around
       the right way/the right type/not actually your pet
       hampster before soldering.  Desoldering is a pain
       with out a gun (if you do enough electonic work to
       justify a desoldering gun why are you reading this).

Start by installing all 9 wire links as these are hard to get
at after the other components are installed.  For the three
longest links it might be a good idea to use insulated wire.

There are 3 links in the top right hand corner under the
voltage regulators, two just to the left of the switch, two
between the 74393's and the 28 pin socket and two at the
bottom of the board to the left of the IDC socket.

Next install all the resistors (14). R14 shown in the overlay
as ???? is choosen according to the type of 74595 you are
using. Also Q7 the optional MPSA65 Xistor will need to be
installed with some chips to make the clock fast enough.  If
Q7 does need to be installed the track next to it will need
to be cut where marked.

R14     Chip Type   Q7

4k7     ANY LS      No
560R    Texas HC    No
220R    Motorola HC Yes

After the R's install the IC's and the 28 pin socket.  The
IC's can only be soldered one way round.  The end of the
IC with a notch in it or a dot/dimple in one corner is pin
1.  This end must match up with the notch in the overlay.
Be carefull with the IC's allthough they are fairly heat
tolerant you can fry them with over enthusiastic soldering.

The 3 1N4004 diodes also have to be installed the right way
around.  The end with the white stripe on has to match the
stripe in the overlay.

The 6 Xistrs can now be installed making sure you follow
the key on the overlay.  Q7 the optional MPSA65 Xistor
should now also be installed if necsesary and the track
next to it cut.

All the Caps (8) should be installed noting the polarity
of the 4 Electros and 1 Tant (The longer leg is +ve or on
the Electros -ve is marked on the plastic body).

To finnish of you only need to install the Trimpot the 3
VRegs, the switch the LED and the two conectors.  When
installing the VRegs the LM317 should be wrapped in sticky
tape to prevent its case touching the case of the 7805.
This is because it's case is output rather than ground.
If the metal cases on the regulators do touch you WILL
blow up chips.

Testing.

Plug the programmer into 12VAC and check that there is about
5V at the IC's.  VCC and GND are at the top right and bottom
left of an IC when it is standing up-down.  Test the voltage
between ground and all the parrallel port pins to make sure
none are much above 5V.  If both of these tests check out OK
plug the unit into a PC.  Run the Program TESTHW.EXE and follow
the screen instructions to test EPROM voltages.

If all is OK Run-Test the unit by running the programming
software to program and read back an EPROM.


The Software.

The programmer uses different software for different
EPROMS as outlined below

EPROM Type      Fast Program    Slow Program

27X64           F64.EXE         S64.EXE
27X128          F128.EXE        S128.EXE
27X256          F256.EXE        S256.EXE
27X512          F512.EXE        S512.EXE

Also when programming 27X512's you must move the switch
into the down position.

WARNING - DON'T PLUG AN EPROM IN UNTIL THE SW TELLS YOU TO.

When run the software searches all three ports for the
hardware and calibrates its timmer.  Apart from that the
software is menu driven and self explanatory.

ENJOY IN MODERATION.