PSOS (real-time operating system): Difference between revisions

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'''pSOS''' ('''''P'''ortable '''S'''oftware '''O'''n '''S'''ilicon'') is a [[real time operating system]] (RTOS), created in about 1982 by [[Alfred Chao]], and developed/marketed for the first part of its life by his company [[Software Components Group]] (SCG). In the 1980s pSOS rapidly became the RTOS of choice for all embedded systems based on the [[Motorola 68000]] family architecture, because it was written in 68000 assembler and was highly optimised from the start. It was also modularised, with early support for OS-aware debugging, plug-in device drivers, [[TCP/IP]] stacks, language libraries and disk subsystems. Later came source-level debugging, multi-processor support and further networking extensions.

In about 1991, Software Components Group was acquired by [[Integrated Systems Inc.]] (ISI) who further developed pSOS - now restyled pSOS+ - for other microprocessor families, by rewriting the greater part of it in C. Attention was also paid to supporting successively more [[integrated development environment]]s, culminating in pRISM+.