How exactly do PAL chips get programmed?

[Holger Veit]

Roger Merchberger wrote:

> Rumor has it that Teo Zenios may have mentioned these words:
>
>> So if I have the original code and know what chip it needs to be 
>> programmed
>> on I might be in luck, otherwise there is little hope?
>> Are PAL's or GALs expensive to get? Do people here have access to
>> programmers?
>
>
> I have a programmer that can do older PALs and/or GALS -- not enough 
> brains to actually use it, tho.[1]
>
> Older PALs/GALs/PEELs can be had pretty cheaply at www.bgmicro.com 
> (It's a US company, dunno what's available worldwide, tho they might 
> ship worldwide... you'd have to ask them) - maybe someday I'll 
> actually be able to figure out how to program some of those critters.
>
They do ship worldwide, payable via credit card, but be aware that you 
might have additional costs at your local customs. Interestingly, this 
happened to me only once in four cases...

Holger