30 Apr
2012
30 Apr
'12
2:13 a.m.
-----Oorspronkelijk bericht-----
Van: cctalk-bounces at classiccmp.org [mailto:cctalk-bounces at classiccmp.org]
Namens Jim Brain
Verzonden: maandag 30 april 2012 6:23
Aan: General Discussion: On-Topic and Off-Topic Posts
Onderwerp: Re: EPROM and EEPROM Programmers
On 4/29/2012 11:09 AM, David Riley wrote:
> On Apr 29, 2012, at 11:49 AM, Rob Jarratt wrote:
>
>> I believe the Willem programmer may be suitable, it is certainly
>> affordable, would that fit the bill? It seems to come from Thailand,
>> although there seem to be all sorts of sources on ebay, so I am not
>> sure what the genuine source really is.
>>
>> I am also not averse to buying secondhand, ebay or otherwise, if I
>> can get something that is going to be more generally useful than the
Willem.
I've heard
some pretty bad things about the Willem programmer.
I know others have defended the Willem units, and I'll add my note as a
customer. I did do my research:
Be aware most Willems will require a parallel port. Most newer units will
also
sport a USB port, but it's for power only.
Some of the newer units will indeed work with USB.
Either way, buy a unit with a socket for an external power supply. The on
board
charge pump can't do enough with USB supplied
power to handle all of the
EPROM programming variants.
Note that you can build your own Willem, the schematics for the parallel
port
versions are online:
http://www.mcumall.com/forum/topic.asp?TOPIC_ID=100
http://www.digital-
circuitry.com/FILES/Willem/Willem_Schematics/willem_SCH3Bx.pdf
You can turn the v3 into a v4.5:
http://www.py2bbs.qsl.br/willem_pcb45en.php
I think there is a Linux programming app (not sure how current it is):
http://sourceforge.net/projects/geepro/
Jim
--
Jim Brain
brain at jbrain.com
www.jbrain.com
You can also count me in as a satisfied Willem user, I use the Willem for
more modern components and I have a Data I/O 29B for the more vintage parts
like Bipolar PROMS. Together with some conversion sockets I can program
almost everything .
-Rik