DEC Pro operating systems and MFM emulator

Bill Gunshannon bill.gunshannon at
Sun Jan 24 10:51:30 CST 2021

On 1/24/21 11:40 AM, Chris Zach via cctalk wrote:
>> Listening to these conversations make me really wish I had not
>> given my 2 PRO's away.
> 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.

Well, my first LSI-11 was a Terak 8510.  It  had 28KW of memory and
4 8" RX01 compatible floppies and an LSI-11/02 CPU.  And I developed
programs in Pascal, Fortran-77 and COBOL (yes, COBOL!!) on it.  Now,
there is slow.  I would gladly take a screamer like any Pro over doing
software development on the Terak.


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