SCP/Microsoft 20HAL uploader

[Richard Cini]

All –

 

                I’ve done a quite a bit of work with my Seattle Gazelle, and I just did some work on 86DOS.SYS (not released in source form, as far as I know) and its comparison to PC DOS 1.0 (at the code level, a very high correlation as you can imagine). Partially related to that is a program called “20HAL” which was a code uploader Microsoft used in the late stages to get code from Microsoft in Bellevue to IBM in Boca Raton, FL. I did a little write-up on it here (http://www.classiccmp.org/cini/hal.htm)

 

                There are some holes in the analysis – I think it’s pretty close, though -- but I’d really like to get some more details on it. Unfortunately, it’s 40-year-old code at this point, and how many people remember how they used a file transfer utility that long ago?

 

                Anyway, enjoy the read. If anyone sees any corrections that need to be made, let me know. Thanks!

 

Rich

 

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Rich Cini

http://www.classiccmp.org/cini

http://www.classiccmp.org/altair32