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-