[email protected] (Tom Marchant) writes: > And they ran on processors with somewhat different architectures. The s/360 > model 67 supported 32-bit addressing, while s/370 was limited to 24-bit > addressing > until XA in 1982 or 1983 began to support 31-bit addressing, not 32-bit like > the > model 67.
360/67 multiprocessor support also allowed all processors to address all channels ... the 360/65 multiprocessor support just shared memory but had dedicated channels for each processor ... real multiprocessor support was simulated by using twin-tail controllers with dedicated channels from different processors to the twin-tails. this is also the multiprocessor implementation for 370. XA finally got all processors being able to address all channels. -- virtualization experience starting Jan1968, online at home since Mar1970 ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
