RX02 drive emulation (was RE: Lisa Profile Drive emulation on a PC)

From: ajp166 <ajp166_at_bellatlantic.net>
Date: Fri Nov 10 21:22:02 2000

From: Clint Wolff (VAX collector) <vaxman_at_uswest.net>


>out in software. I work with enough brainy people I should be
>able to get a PLL and data separator working under matlab...


Thats the easy part. RX02 was a dual density system with
the data being recorded in double density (MFM) and the rest
of the marks in FM (single density). A PLL that can make that switch
is better than good. Hint it was done as DSP in hardware TTL
and 2901.

Rx01/02 based system (DEC or clone) only read a fixed set
of formats and that's it.


True RX01 and 02 systems the drive box was semi smart and the
cabled to the system where the card there was only a bus interface.

I have both real RX02 (also reads RX01) and also CPM crates with
"normal" 8" floppies.

>a 10-pin ribbon cable coming out of it. I also have a dual RX02 that
>came with an 11/23. Can the interface card be used in a uVAX?


Yes but software support may not be there depending on version of
OS used.

>Before I sell the CP/M 68K system, I want to make sure I keep all the
>DEC formatted floppies that belong to the '780.


Those were as memory serves RX01.

Allison
Received on Fri Nov 10 2000 - 21:22:02 GMT