[Coco] 2764 EPROM vs 2864 EEPROM

[Steven Hirsch]

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.


>> 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
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