steve_bank
Diabetic retinopathy and poor eyesight. Typos ...
I was a fieldenginer in 1970 for Automatic Data Processing(ADP). The used mainframes and what were called minicomputers. The PC of the day. It had a backplane/motherboard. A 29 meg hard drive, and a tape drives.
To cold start the system you had to enter boot addresses into registers with switches to set bits for addressing the boot rom which loaded a boot loader from tape.
The processor was TTL logic made up of ALU(CPU) called bit slices. The OS was Pick.A manual for one of the systems.
Microdata
Pictures
http://www.radio-astronomie.com/multi4.htm
http://pichotjm.free.fr/Multi8/Multi8.html
Maintenance manual
http://bitsavers.trailing-edge.com/pdf/microdata/800/70-1_0800-004_Micro800_Maint_Aug70.pdf
Anybody remember the Radio Shack portable TRS 80?
https://en.wikipedia.org/wiki/TRS-80_Model_100
To cold start the system you had to enter boot addresses into registers with switches to set bits for addressing the boot rom which loaded a boot loader from tape.
The processor was TTL logic made up of ALU(CPU) called bit slices. The OS was Pick.A manual for one of the systems.
Microdata
Pictures
http://www.radio-astronomie.com/multi4.htm
http://pichotjm.free.fr/Multi8/Multi8.html
Maintenance manual
http://bitsavers.trailing-edge.com/pdf/microdata/800/70-1_0800-004_Micro800_Maint_Aug70.pdf
Anybody remember the Radio Shack portable TRS 80?
https://en.wikipedia.org/wiki/TRS-80_Model_100
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