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I > INTEL > Intellec Series

Intellec Series

Alex Tidmarsh exprience:
Back in 1985, we used an 8085 Intel Series II MDS running ISIS II to develop PL/M code for Intel 8086 target systems.
We later migrated to an Olivetti M24 PC-compatible that had a Kontron Z80 card fitted. This card would run ISIS II on top of the Olivetti's MS/DOS. It allowed us to continue to use the original 8085-hosted PL/M compiler to develop code for the 8086!
It was a superb example of bringing together different software and systems never intended for each other to work in perfect glitch-free harmony!

Ervin Kallstrom's mds story:
My first computer was a "home brew" mds series II that happened after I purchased a shopping cart full of various logic boards from a salvage firm for $300.00.  I was delighted when I found a multibus cardcage and a 8080 processor based logic board with 32 mb ram (lots in those days  early 80s).  I found a used heavy duty power supply that produced the many voltages needed. I used a metal cabinet stand from a mimiograph machine and built the works in.  I could remove the top and the door opened for frontal access for service.  I purchased a tec 630 terminal and wired the intellect control panel led and buttons in the front panel of the terminal. When all was complete, I turned it on and the screen message was "Failure PIO not responding".   I did not realize at the time that I had a working intellect on hand!!

I contacted Intel and the  folks there sent out a complete set of manuals and schematics for the system gratis!  I was now about to make the cables to connect the disk drives!.
I purchased a pair of Tandon half height double sided , double densitity  diskette drives for $250.00 each then also located the two multibus boards that made up the disk subsystem.
I found some diskettes that had the isis operating system and some unknown programs on them.  After some dirty contact problems , I finally got the system to boot up, but still with that "Failure PIO not responding" message which now I understood to mean "parallel in-out not responding".  Didn't matter because I used the  serial port.
My son went to Paradise Valley high school in Phoenix at that time and advised me that one of his teachers was familiar with the intellect system and from the teacher I obtained a diskette with one program that was labeled WS.COM which was Wordstar. but my computer was an ISIS system..

I found an engineer Gary Forbes that had a number of intellects running on CPM-80 and he did a modification to the cpm system that I bought from Digital Research  to run on the Intellect..   I now had the best of two worlds..  The CPM  for the large number of available programs at that time and the ISIS system for expermenting!..
I used that system and developed an accounting product running on CPM and later upgraded (and slowed down considerably) when I purchased a new Zenith  pc to join  the modern world where 5.25 inch diskettes were the norm!
By the way, I have a working complete mds 230 running system II and system III software with the original huge diskette drives!

Erik Jordan recalls:
I encountered an Intellec Series II Model 230 in 2004. It was donated to us, along with a myriad of other components such as Eeprom burners and the like, to my Vocational School. It was too old to be used by the school, so we were instructed to disassemble it to learn how it worked and could ask to keep certain parts. It was quite a learning experience disassembling this old unit, and it came with the main box, the monitor, and a dual 8" floppy drive

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