Operating the MDM-24There is no automatic boot up. When the MDM-24 is powered-on, she doesn't do much more than basic initialization of its micro-coded control circuit.
If the purpose is to experiment with low level software, this is the time for doing so. Software can be entered by hand using the switches in the Control Panel. It can also be entered using the CPU RS232 Port dumping large amount of code into selected zones of Memory or even the Matrix. By using the Control Panel, the computer can also be switched to Protected Mode back and forth, ran in single step, etc. This is "debug-time"!
If the purpose is to load the Operating System so the computer can do something useful, the operator has to enter the boot-strap routine manually, either by switches or CPU RS232 Port. The OS should reside in a well known place at the STORAGE Unit.
Once the OS is up and running, the computer can be operated from Terminals (or PCs running Terminal Emulation programs) attached to the COMM Unit (either locally or via modem).
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Homebuilt CPUs WebRing
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David Brooks, the designer of the Simplex-III homebrew computer, has founded the Homebuilt CPUs Web Ring. To join, drop David a line, mentioning your page's URL. He will then add it to the list.
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Project start date: May 13 of 2009
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