Msg: 986 *Conference*

11-24-91 12:16:52

From: RICHARD HANSON

To : FRANK MCJUNKINS

Subj: REPLY TO MSG #984 (M/L PGMING 8085)

Here's the basics of how I burn ROM's.  First, let me say that I, too, was
confused.  I asked Tracy Allen, EME Systems, for some pointers.  His help was
invaluable to getting me off the stick.  Knowing that I would not fully
understand what he was going to say to me I took notes, then went away and
studied them.
 
My goal was to recreate [copy] already produced ROM images.  I knew almost
nothing about the subject, other than conceptual knowledge.  I did not know
specifics.  I had to get involved, somewhere, make a few mistakes and learn
from experience.  First, I needed to purchase some items:
 
ROM burner: A.T.R.'s EPP-1, $200, Jameco Electronic Components, Belmont, CA.
 
EPROM's: 27C256, 200ns, $3.50 - $6 each, FRY's Electronics, Fremont, CA.
 
ROMBO's: $9 each, EME Systems, Berkeley, CA.
 
I connected the ART1 to a DOS computer via the serial port and accessed it via
a communications program at 1200 baud.  I placed a working ROM in the ART1 and
copied the contents into a file on the DOS computer.  I replaced the working
ROM with a fresh EPROM and transferred the file from the DOS computer into the
EPROM.  The process took about 20 minutes in either direction.  I placed the
new, freshly "burned" EPROM into a ROMBO, stuck it into a Model 100 and called
it.  Bingo!  It worked first time.
 
I'll stop here and let your and others respond to, add to, or request further
details.  Hope this helps you get going... -Rick-