23 Oct
2025
23 Oct
'25
7:31 p.m.
Yeah the Pro controller is far more hopeless than even an RQDX1. The
single biggest reason I want to get POS/M+ running with split I/D is so
I can finally have cache. A Pro with 3mb memory with cache would be
pretty impressive.
Cache makes the difference. My crummy 11/73 with the RQDX3 can run close
in speed to the 11/83 with the MTI ESDI controller when I load it with
cache.
But for MFM Dave's controller is the thing to have.
On 10/23/2025 7:36 PM, Paul Koning wrote:
On Oct 23, 2025, at 7:27 PM, Christopher Zach via
cctalk <cctalk(a)classiccmp.org> wrote:
Wow. I still run maxtor rd54 drives on one of my 11s and rd53s on the pro 380s. Work fine
enough
Gesswins device is outstanding, I have one and have used it to make backup images of all
sorts of systems.
My Pro has one also. Among other things, it allowed me to debug a low level formatting
utility without having to worry about destroying the few drives I own. And it let me
experiment with alternate formatting settings (different interleaving) which to my great
surprise showed that the default is also best, independent of CPU speed. (Which means
that the controller is the problem and is pathetically slow.)
paul