On Tue, 3 Apr 2018 17:48:52 +0000, Seymour J Metz wrote: >A point of idle curiosity. When Amdahl dropped the 470 and announced the 470V, >did they change the panel color?
I'm pretty sure that the 470/6 was never shipped. The way I heard it was that work on the 470/V started very soon after the introduction of virtual memory on 370 machines and the announcement of OS/VS1 and OS/VS2. OS/VS1 and OS/VS2 release 1 were both introduced in 1972 and OS/VS2 release 2 (MVS) in 1973, though I don't know when it actually shipped. See http://bitsavers.trailing-edge.com/pdf/ibm/370/OS_VS2/Release_2_1973/GC28-0667-1_OS_VS2_Planning_Guide_for_Release_2_Nov73.pdf The Wiki article on Amdahl Corporation is no help here. According to it, the 470/6 was introduced in 1975, and that when IBM announced DAT, Amdahl dropped the 470/6 and replaced it with the 470V/6. It also claims, incorrectly, that MDF was first shipped on the 470V/8. In fact, MDF required major architectural extensions that were not available until the 5860. -- Tom Marchant ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
