Ee?prom burners [Was: Re: CUBIX/6809 updates]

[Dave Dunfield]

> In college we wire-wrapped a pdp-8.  The final was to repair it in 2
> hours after the instructor had made several changes to either the wire
> wrappings, chip orientation (hot chips!) or PAL changes.  The 2nd
> semester was wire-wrapping a 6809-based FLEX system.
> 
> That said, the only thing that's really kept me from building machines
> (heh, besides time and money!) is the lack of an eprom (or eeprom)
> burner.
> 
> What do you guys recommend?  Are there instructions for PC-driven
> burners online somewhere that seem reasonable?  If not homebuilt, what's
> a reasonable price for one?

Although I have a 29B, I still do most of my "simple" EPROMS (2716-27256)
with a little homebrew burner that I also built back in the 80s. It too is based
on the 6809 (it's can run standlalone with a keypad or controlled via a host).
I have published the design which is available somewhere on my commercial
website if you are interested...

However, I don't know that I would bother, as EPROMS are a pain in the butt
to program due to odd voltages which you must supply/switch - a modern flash
chip will do just as nicely and you can program it with TTL level signals. I did
a very simple flash device programmer via a PC parallel port (uses little adapters
for various flash devices).

Regards,
Dave

--
dave04a (at)    Dave Dunfield
dunfield (dot)  Firmware development services & tools: www.dunfield.com
com             Collector of vintage computing equipment:
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