The 4341 was introduced in 1979 before DAS (1981), and was marketed primarily for its ability to run in ECPS:VSE mode to support DOS/VSE. GA24-3672-4_4341ProcessorMG1FunctionalCharacteristics under Programming Support says"programming support is provided by DOS/VSE, OS/VSl, OS/VS2-MVS, and VM/370".
That doesn't preclude the possibility of adding DAS support later, and in fact the top of the 4341 line model group 12, introduced near the end of 1982, apparently did include DAS support as a standard feature (Ref: GC20-2102-2 Guide to the IBM 4381 Processor, p128, comparing features of a 4341 MG12 to features on 4381 models). Availability on at least one model is sufficient to demonstrate DAS support existence on a 4341. Joel C Ewing On 1/8/21 12:35 PM, Seymour J Metz wrote: > Thanks. I thought that the 4341 had it, but I couldn't find anything on > bitsavers to back that up. > > > -- > Shmuel (Seymour J.) Metz > http://mason.gmu.edu/~smetz3 > > ________________________________________ > From: IBM Mainframe Discussion List [[email protected]] on behalf of > WILLIAM H BLAIR [[email protected]] > Sent: Sunday, January 3, 2021 5:14 PM > To: [email protected] > Subject: Re: What were the first models to support Dual Address Space? > > | Does anybody remember the first models to support > | Dual Address Space for MVS/SP Version 1? I'd like > | to add that to the wiki [[IBM System/370]] article. > > In hardware, it was the 3033 (as well as the 3042 Attached Processor), as > well as a hardware assist MES for the 3031. It was also, of course, also > supported on the 3081 (and all processor models thereafter).If I remember > correctly, this support was not offered for the 3032 in any form. > > For additional information, refer to: > > http://secure-web.cisco.com/1fwo0WzrRHfsEKmX2WnCPbvS6zDh3sBb8eGXvFegmbLqXIzIk_HWhBMbZUqOeTl6j7_1j-HSUf-lAdmAMSdQQWWzHMWI8VlgQaKmtbcKgkVbAFCahbxqT3MROak4FXXMdX6Mg4NGn46RLXSurBep0EZs-0jCCV3m7msbG5sUpt60gd5sMQNV8pJ8uL9lmWk3JBu9LqoXXU_H4TlnojFbvI1IRLFJrhVMWEWgn9Uq66Lx-ctVR2AEHl5PzUtRFLohjq0P6CkLATen2Daa7LZ71g3ntGQL-4mmfhSpQPq45M25bgCGGSL8YFSW7eVe33H8mAFlHehNGaJu8wqeheIb4k8JWFkm2705I41fbr3Q3GO5bPlzVzzfqTBbKoeUZfbzn0p1qRRtqeEsfAcFvIiNeRq-RHsCr4eccEn4H758CEnSauz2kEaCf1vMWfN9xJEWp/http%3A%2F%2Fwww.computinghistory.org.uk%2Fdownloads%2F8823 > on page 114. > > In software, it was supported on any System/370. The ABENDs were intercepted > by FLIH and the unsupported instructions and control registers emulated. > > This worked on my 370/158 at the time (1980). > > -- > William Blair > Sugar Land TX > -- Joel C. Ewing ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
