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


KISS Instructions

The following instructions form a quick guide for experienced
constructors.  If you have any doubts about anything read the
complete instructions in the file INS_RTFM.TXT


Assembly.

Install the wire links first as the ones under the VRegs are
really hard to get at latter.  Apart from that All polarised
components face the same way and the IC's face the same way.
The only thing you have to watch is the Diodes directions (you
can follow an overlay can't you) and the cap under the last
VReg is a Tant not an Electro.  Also if the cases on the VRegs
look like they will touch wrap the LM317 in tape as its case
is output rather than ground.

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 is installed the track next to it
will need to be cut where marked.

    Chip Type   R14     Q7

    ANY LS      4K7     No
    Texas HC    560R    No
    Motorola HC 220R    Yes


Testing.

Plug the programmer into 12VAC and check that there is 5V at
the IC's.  Next check that there is no more than about 5V at
any of the parrallel port pins.  If you are satisfied 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.


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.
