Intel MDS Series II IOC question

Dave Mabry wrote: As "promised" I have been disassembling 8080 code from the IOC board on an Intel MDS. This is not really difficult to do, but it is VERY time consuming. Turns out that I have been working on two different versions of the firmware...VERY DIFFERENT. The earliest version of IOC firmware that I know of is called V1.3, or at least that's the signon version number for the diagnostic code within it. Intel released a major enhancement for that firmware in about 1982 or 1983. They sold a package called the iMDX-511 that included the newer firmware and new code for the 8741 cpu in the keyboard. All MDS Series II's sold after that date had this code right out of the factory. The enhancements included cursor addressibility, some character attributes (like underline, bold, reverse video), soft keys that included some of the common ISIS-II commands, and other things like that. Interesting how this was a major enhancement at the time and is, of course, taken for granted by computer users today. So, I'm still working on disassembling, understanding, and commenting the V1.5 code for the IOC. If anyone is interested (Tony, you said you were! :)) I have put it online for anyone to snatch. It is the ".LST" file output from Intel's ASM80 Macro Assembler. That is the file that you would send to a printer, so it has lots of info. If anyone is interested enough to help me a bit, I would like to understand where the RAM diagnostic is in 1.5. I have identified it in 1.3, but V1.5 looks to be completely rewritten. The two versions are here: http://www.mich.com/~dmabry/intel/ioc When I have enough information on V1.5 I'll break out the ICE-80 again and dim the lights in my neighborhood! :) Dave Mabry