I have the original manual, and it has no hint of a monitor, aside from one they sold as a separate product. I'm planning to use the monitor to test the various boards I have. According to the Intel doc's, the 8010,8020, and 8024 boards all used the same hardware addresses, as did the monitors they sold for them. That will serve me well, as I intend to use a script running on a terminal emulator on the PC in order to verify proper operation of the various features on the board. I bought the Intel monitor for the 8020 and 8020-4, which has an 8080A, while the 8024 has an 8085. It was not a very nice piece of work, so I'm hopeful I can find something a bit more up to date. The Intel monitor was delivered to the customer who paid for it back in the '70's, and I haven't seen one since. I'm just not interested in writing a monitor just for the at most ten boards I'll have to check out. In the last 10 years, I've not encountered even one person who's used these boards. They were VERY popular in the late '70's. Does anybody know the Hi-Tech 'C' compiler for CP/M well enough to know whether it produces 8080 code? I was under the impression that it generates Z80 code but recently was told it has a switch to produce 8080 mnemonics as well. Now I've got at least half-a-dozen 'C' compilers for CP/M, any one of which should produce 8080 code, but AFAIK the Hi-tech (Pacific) compiler is the only one that also has a version for several other CPU's as well, so it would be worth using just for the exercise. I could justify writing an original monitor in a 'C' dialect portable to several MCU's, but not just one. I might as well do that in assembler. Aztec, BDS, Whitesmith, among others, are all history. <sigh> Maybe the "small-C" (Hendrix) could be used, since I can write my own code generator. I'd rather skip that step though. Dick ----- Original Message ----- From: ajp166 &lt;ajp166(a)bellatlantic.net&gt; To: &lt;classiccmp(a)classiccmp.org&gt; Sent: Saturday, October 28, 2000 2:55 PM Subject: Re: Monitor for iSBC 8024