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

[Brian Wheeler]

On Tue, 2005-12-13 at 22:47 +0000, Dave Dunfield wrote:
> > 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).


Thanks for all of the responses, everyone...I've got lots to think about
(and with christmas being soon, I've got to think fast :)

Brian