> We have a 3270 machine somewhere, but I haven't gotten around to see if
> it's complete. IBM also issued a software package to turn their PC's
> into 370 terminals.
>
> On Wed, 4 Aug 1999, Mike Ford wrote:
>
>> The PS/2 newsgroup has been talking about the AT and XT models that
>> included a pair of cards that allowed fairly complete, if a bit slow, 370
>> mainframe emulation. Anybody every run across any of these?
I don't think the 3270PC was what Mike meant.
There was a PC with a couple of boards in it that became a self contained
machine running the 370 instruction set. It was intended as a 3270 variant,
though - developers would download their code to the PC, debug it on the local
processor, and upload the next version, freeing the big machine (of which many
companies had only one, after all) for users who wouldn't grab oodles of
processor time with an incorrectly terminated loop or whatever.
I, like Hans, have never come across one of these, although I heard of them back
at IBM in '85 or '86. But I recall a rumour from another source that the 370
emulation was based on the 68000 circuitry but with custom microcode.
These machines would run VM but not MVS, I think.
Philip.
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Received on Wed Aug 04 1999 - 11:27:35 BST