FA-PDT-11/150 on eBay

From: Megan <mbg_at_TheWorld.com>
Date: Sun Jun 1 20:32:00 2003

>Does the PDT-11/150 use the DX.SYS device driver
>to run the RX01 floppy media?

No, it uses PD.SYS... and the actual code which does the
hardware control is pretty much in ROM... the PD driver
calls the ROM, and the ROM knows about RT-11 queue
elements. It returns with either success or failure.

>Also, from what I understand, the PDT-11/150 can run
>RT-11, but not RT11XM, only RT11SJ and RT11FB.
>And the maximum memory is probably 64 KBytes with
>the IOPAGE taking either 8 KBytes (or 4 KBytes?).

The actual memory layout is 60kb with a 4kb IOpage. It
does not have a memory management unit, so RT11SB and FB
are the only ones which run on it.

                                        Megan
Received on Sun Jun 01 2003 - 20:32:00 BST