DEC Pro operating systems and MFM emulator

Rob Jarratt robert.jarratt at
Sun Jan 24 10:48:13 CST 2021

> -----Original Message-----
> From: cctalk <cctalk-bounces at> On Behalf Of Chris Zach via
> cctalk
> Sent: 24 January 2021 16:40
> To: cctalk at
> Subject: Re: DEC Pro operating systems and MFM emulator
> > Listening to these conversations make me really wish I had not given
> > my 2 PRO's away.

I have two but neither of them works. I have made a couple of attempts to find the fault but failed so far. One of them is quite high on my list of the next thing to look at (again).


> They are neat, but they are so god-damned slow. Compiles on the pro/380
> with an RD52 are 1/4th the speed of an 11/83 with a 330mb ESDI disk.
> It's to the point where I compile on the 83, then upload the results to the Pro
> to run.
> I wonder if compiling a true version of M+ could help: At least you could
> dedicate memory as a disk cache to get around that slug of a controller in
> there.
> But the lack of CPU cache, 10mhz processor, extremely slow disk speed, and
> the like really hurt the Pro.
> CZ

More information about the cctech mailing list