Intel MDS 121

Producer: Various  -  Category: Personal Computer

Development system, 1970s, Intel. The Intellec Microcomputer Development System (MDS) was the tool with which engineers developed software and hardware for Intel's early microprocessors. The system is a large blue box with a card cage on the Multibus, an 8080 processor, a front panel and, in the Series II versions, a built-in terminal with keyboard and 8" floppy drives; it ran the ISIS operating system with assemblers, PL/M compilers and an in-circuit emulator that plugged into the target board. Intellec systems were sold years before the Altair and are among the first microcomputers.

Years1973 to early 1980s
ProcessorIntel 8080 (8085 in the Series II)
RAM32 to 64 KB
Storage8" floppy drives, hard disk on the later models
Operating systemISIS-II
BusMultibus
Softwareassemblers, PL/M, FORTRAN, in-circuit emulators for the 8080, 8085, 8048 and 8086

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