[Coco] 2764 EPROM vs 2864 EEPROM

[Gene Heskett]

On Sunday 29 September 2013 13:35:52 Steven Hirsch did opine:

> On Sun, 29 Sep 2013, Gene Heskett wrote:
> > On Sunday 29 September 2013 10:34:33 Steven Hirsch did opine:
> >> On Sun, 29 Sep 2013, Gene Heskett wrote:
> >>> Now that worked, but the file links are all #403.  I will order the
> >>> big Willem kit if and when a good CC arrives
> >> 
> >> If you are thinking of buying from Sivava, be aware that you will
> >> have none, nada, zero, zilch tech support.  He is happy to take your
> >> money, but does not respond to e-mail after the unit is in your
> >> hands.
> > 
> > Thanks for the heads up Steve.  I take it that the SW I just
> > downloaded for linux will likely not work with it either.
> > 
> > I take it then that this is an example of some jerk buying out a good
> > product, and then modding it just enough to make a captive customer,
> > and then not supporting that customer.
> > 
> > One of the worlds surplus rectums IOW.
> 
> He did not make himself a lot of friends in the Willem community.  There
> are other folks offering "real" Willem programmers without proprietary
> mods.  I think you'd be better served with one of them.  eBay should
> turn some up.

Since this seems to be well known, I take it that since all this stuff is 
of Chinese gestation, one should steer clear of the ones claiming an 
updated PCB, supposedly adding some very recent 3.3 volt devices to the 
menu?  The google hits are numerous, and seem to swing both ways.

Eg, one that doesn't brag about that "Feature" stands a lot better chance 
of being a clone of the real thing?

> >> Also, if mine is any example, it has been subtely modified from the
> >> public Willem standard and is dependent on Sivava's modified software
> >> (for which no source is available).
> >> 
> >> Finally, the charge-pump scheme used to develop the 21V rail for
> >> programming older NMOS parts is generally not able to source enough
> >> current for reliable programming.  There's plenty of discussion on
> >> this on the Willem forums (not sure they are still online).  I ended
> >> up buying a retro-fit kit from one of the folks there since I blow a
> >> fair number 2708, 2716, 2732 etc.
> >> 
> >> As always, Caveat Emptor!
> >> 
> >> Steve
> > 
> > Cheers, Gene
> > 
> > news: gotcha
> > A pen in the hand of this president is far more
> > dangerous than 200 million guns in the hands of
> > 
> >         law-abiding citizens.
> > 
> > --
> > Coco mailing list
> > Coco at maltedmedia.com
> > http://five.pairlist.net/mailman/listinfo/coco


Cheers, Gene
-- 
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)

Q:	Why do the police always travel in threes?
A:	One to do the reading, one to do the writing, and the other keeps
	an eye on the two intellectuals.
A pen in the hand of this president is far more
dangerous than 200 million guns in the hands of
         law-abiding citizens.