microcoding a PC into a PDP-11 (was: RE: Classic Computers vs.

From: Bill Pechter <pechter_at_bg-tc-ppp1488.monmouth.com>
Date: Fri Sep 21 06:23:29 2001

> > Actually much of the 11/780 microcode is in rom.
> > The stuff loaded from RX01 is mostly bug fixes to the rom code.
> > The patches went into the Writeable Control Store board.
> >
> > The 11/785 went to completely RAM loaded microcode.
> > The 11/780 did have an optional second User Writeable Control Store
> > board.
>
> What about the 11/730? I remember seeing a fair amount of fast-ish RAM on
> the CPU boards (which I took to be a writeable control store) but not
> that much PROM.
>
> -tony

I believe the 11/730 and 11/725 was all WCS and that was why the 11/730
had dual TU58s... one drive for console and one for WCS.

Bill

-- 
  d|i|g|i|t|a|l had it THEN.  Don't you wish you could still buy it now!
  bpechter_at_shell.monmouth.com|pechter_at_pechter.dyndns.org
Received on Fri Sep 21 2001 - 06:23:29 BST

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