Yes. I took care of VS1 1.7D with BPE (Basic Programming Extensions) on
a 4341.
On 2020-09-01 22:56, Mike Schwab wrote:
Well, this is what confused me. OS/VS1 1.7 was released to run on the IBM 4300.
VS2 is multiple address spaces, vs VS1 is a single 16MB address space, correct?
https://nam05.safelinks.protection.outlook.com/?url=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FIBM_4300%23Operating_systems&data=02%7C01%7C%7C6fa1bedaf4bb4215188808d84eebd988%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637346122168286714&sdata=WbBo0CYQaxXI%2B%2B8BSChV1384pI802SAupW8ye5QjTQw%3D&reserved=0
On Tue, Sep 1, 2020 at 6:27 PM Phil Smith III <li...@akphs.com> wrote:
mike.a.sch...@gmail.com (Mike Schwab) wrote:
Well, XA+ machines only supported 4K pages / 1M segments and not 2K
pages / 64K segments. Then DAS and Access register additions. The
43xx series only supported a single virtual address space, like
DOS/VSE. 3090s were the only processors to support Vector
instructions, and op codes were re-used in z series.
What does this mean, "a single virtual address space"? VM ran fine on it, with
many virtual address spaces. Are you perhaps thinking of V=R/V=F? I disremember whether
43xx supported those.
...phsiii
P.S. "zSeries" (RIP)
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