[TriLUG] No more Linux on WRT54G???

[Rick DeNatale]

On 11/15/05, Reginald Reed <reginald.reed at gmail.com> wrote:

> Wow, I remember the PC/XT3270. We had one in the office I worked in at my
> University. If I remember correctly, it was a channel attached terminal
> device an ISA card. We never used it for anything more than a dumb terminal,
> but I much preferred the old 3278s.

I don't think that it was channel attached. IIRC, it connected to a
regular 327x controller.  One of it's problems was that the third
party IRMA card came out and did the same job of 327x emulation
cheaper.

The PC/XT3270 and the PC/XT370 were announced together. Barrons had a
front page article saying that they signalled the end of regular PCs,
how wrong was that?

> In my first group I ever worked in at Cisco, we the RS/6000 equivalent of
> the PC/XT370 - don't remember the model, but it ran MVS on a coprocessor.
> Fairly nifty if you're into mainframes. I never went beyond 370 assemply and
> a little bit 'o REXX.

Perhaps you're thinking of the PC/RT, which IIRC ran AIX.

And IIRC, the XT370 used a coprocessor which was built using a custom
68000 chip. I guess IBM licensed the chip design from Motorola and
built it with new microcode to emulate the 370 architecture. The
68000s data paths and registers were a better fit to the 370 than the
"Universal Controller" family of microprocessors which IBM was using
in various industry specific boxes like the 3790 back then.

And apropos all this, and the recent "old operating systems"
discussion on another thread, I ran into this site yesterday.

http://www.conmicro.cx/hercules/

If you get carried away, you can run MVS and Linux/390 simultaneously
in virtual machines on VM/390 all running in an emulated 390 on Linux.

To get an idea about how beefy that old mainframe hardware was check
out this entry in the FAQ
http://www.conmicro.cx/hercules/hercfaq.html#3.01

--
Rick DeNatale

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