Dear friend

You can bulid your own programmer.
The total project including the software
& schematic of the programmer
(89C51/52/1051/2051/8252) is available at
www.atmel.com.

The programmer will work execellently
if you can modify the software (C source
code is also available at www.atmel.com).
The programmer will only work properly in
PCs which have ECP/EPP options. Otherwise
the programmer will fail to verify programmed
chips / get program from the chip
(ie bidirectional feature of printer port
will not function properly).


I have made that changes & the system is working
very satisfactorily. I have also sold out few
programmer to other 8051 enthusiats to recover
my project & experimental cost.

You can fabricate in a good quality vero board
(glass phenolic ).

Suggestions (As a successful hobbyist/engineer)

Do not use costly ZIP socket in the experiment.

The parallel cable that will be required to
connectthe programmer to the PC is readily
available in the market but in a different
name !!!! - PRINTER SHARER CABLE.
So you do not have to build the cable.


If you need the modified software, please
email me.



Wish you a very successful experiment.



Prashanta

Calcutta, India

Email pdc@caltiger.com