RX02 drive emulation

From: David Gesswein <djg_at_drs-esg.com>
Date: Fri Dec 1 07:23:41 2000

>Date: Sat, 11 Nov 2000 15:48:30 -0500
>From: "ajp166" <ajp166_at_bellatlantic.net>

>>From: David Gesswein <djg_at_drs-esg.com>
>>I haven't spent too much time looking at the interface but most of the
>>smarts are in the drive and serial communication is used to send
>>commands to it. I have a bunch of information on the RX01, the RX02
>>be similar.
>Do look. the two are very different.
I don't know if anybody is still interested...
I scanned the RX02 technical manual and it is now online

It looks like they added some stuff such as DMA and AC low status for the 11
but when in the RX28 PDP-8 mode it still uses the same electrical interface as
the RX01. The RX02 drive has 3 different modes it can operate in via a
switch setting. It appears that the RX8E does not know if it is talking
to a RX01 or RX02, only the software running on the PDP-8 knows. From
a programming standpoint you have to write to the command register
differently in RX02 mode even when single density media is used.
I could still be missing something.

This is probably the easiest mode to talk to the drive in from bit banging
on a PC.

David Gesswein
Received on Fri Dec 01 2000 - 07:23:41 GMT

This archive was generated by hypermail 2.3.0 : Fri Oct 10 2014 - 23:32:47 BST