> 303x external channels (channel director) was 158 engine with integrated > channel microcode (and no 370 microcode).
360 processors with special microcode were used in a number of things. Early in my career, I worked on development of the IBM 3890 high-speed check sorter. (https://en.wikipedia.org/wiki/IBM_3890) The controller in that sorter was a 360 mod 25, with all the code written in native microcode - no 360 instruction set. It turned out to be very fast, and it was many years before IBM was able to find anything to replace that old mod 25 with its core memory. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
