On 03/08/2014 06:43 PM, Shmuel Metz (Seymour J.) wrote: > In <[email protected]>, > on 03/07/2014 > at 07:56 PM, "Nims,Alva John (Al)" <[email protected]> said: > >> IBM 4341 running VM/360 > No such animal; there was a CP-67 for the S/360, but VM was strictly > for the S/370 and its name reflected that. > And the IBM 4341 supported System/370 architecture, so "VM/370" was indeed supported on the 4341 and was probably what the author intended.
I believe the CP-40 and CP-67 precursors of VM/370 required more than just S/360 architecture; namely, a S/360 model that was hardware-enhanced to include a form of hardware virtual memory support, which subsequently evolved to become part of S/370 architecture. So not only is Seymour correct that VM/360 did not exist, but it would also be inappropriate to retroactively think of CP-40 or CP-67 as equivalent to a "VM/360", since both required more than basic S/360 architecture. I remember an IBM 3033 putting out a puff of smoke once, but it stopped before anyone could seriously think about using the EPO. I can't remember whether it was a resistor or capacitor that had fried; but I do remember that the system just kept on running without reporting any errors as if nothing had happened! The CE eventually tracked down the failing component with his nose. -- Joel C. Ewing, Bentonville, AR [email protected] ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
