I have a copy on my website as well. It's also from Christiansen's work, but it does run on my 1802MC. I'm using an RS-232 interface, and an old PC with a real serial port and DOS modem program set to 2400 baud, 7N1 format.It is trying to work but perhaps a active low/high serial issue?
It seems like most of the problems people have are on the PC end. There are all sorts of "gotchas" in getting a USB-serial adapter to work, and configuring all the confusing options on modern terminal programs. So I'd start there; make sure you can successfully send/receive serial data even without the 1802MC involved.
Gregg Levine wrote:
Lee, I'm using the term "board" where our questioner used the termYep; that's quite all right. I named it the "membership card" precisely as an entry point to the 1802. You have to get them started somehow!
Building an original Elf is hard! Rare/obsolete parts, no PC board so you have to wire-wrap it, etc. So I made an "all in one" package with all the parts and easy assembly, to introduce people to this fascinating CPU.
It seems to have worked. Many people have gone on to build ever more impressive 1802 builds, learning and growing as they go!
ICEs have the same problem as lightbulbs. Why innovate and make
better ones when the current ones burn out often enough to keep
you in business? -- Hunter Cressall
Lee Hart, 814 8th Ave N, Sartell MN 56377, www.sunrise-ev.com