EPROM programming (27c160's)
snhirsch at gmail.com
Mon Aug 16 06:43:06 CDT 2010
On Sun, 15 Aug 2010, Mark Tapley wrote:
> At 19:37 -0500 8/13/10, Alexandre wrote:
>> I think I still have an image of the old site on my desktop, mail me if
>> you want that
> Alexandre's link,
> points to a page which my machine loads only glacially, apparently because
> the server isn't responding fast.
> Meantime, my Googling for "willem programmer" produced this page:
> which describes a commercially available EPROM programmer. Packages start at
> US$39. Many adaptors are available, prices $3 - $70. Driver software appears
> to be Windows only (9x - XP). The programmer looks like a single
> free-standing circuit board, ~9 IC's plus a lot of sockets including a DIP
> ZIF socket. USB power, "DB25" data cable (!). Ah, reading further, there's an
> AC/DC power adaptor as well, so I guess you don't need a PC with both USB and
A word of warning about the sivava programmer: It's a modified Willem
unit with its own special software. The developer forked the Willem
project and never released his changes. Caused a lot of rancor.
Also, forget about technical support. He is glad to take your money, but
don't expect any questions or inquiries post-sale to be answered.
Finally, the DC-DC converter used to derive Vpp for 21V EPROMs is
underdesigned and unlikely to yield reliable results. There was a mod kit
available from one of the Willem forum regulars that I ended up
All in all, the Sivava was more trouble than it was worth. There are eBay
folks selling "genuine" (i.e. unmodified) Willem designs for less money.
More information about the cctalk