PDP11/23 - prompt?

[Allison]

>
>Subject: Re: PDP11/23 - prompt?
>   From: Pete Turnbull <pete at dunnington.u-net.com>
>   Date: Wed, 15 Jun 2005 21:53:41 +0100 (BST)
>     To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org>
>
>On Jun 15 2005, 19:25, Philipp Hachtmann wrote:
>
>> If it is possible that I don't have the original bootstrap - can
>anyone
>> send it to me via email?
>
>You may have the original, but if so it's disabled.  "two eproms with
>green labels and nothing written on them" is unlike any originals I've
>seen :-)  If you do want originals, go to
> http://www.dunnington.u-net.com/public/DECROMs/  and download 23-339E2
>  and 23-340E2.
>
>> > You need to carefully inventory your boards and determine what you
>> > have.
>>
>> I have:
>> - CPU (M8189)
>> - RAM (M8067), 128k*18?
>> - RAM (8059), same size?
>> - Floppy controller M8029
>> - Emulex SC02/C RK06/07 compatible SMD disk controller (for my Ampex
>> hard drive)
>> - 2 * M8043 (4 serial ports)
>> - 1 unknown Plessey interface card, P/No. 701775 (What's that ?)
>
>I can't find the Plessey list I'd bookmarked so I can't say what that
>is :-(
>
>However, that SC02/C accounts for the "$" boot prompt, and either the
>EPROMs on the KDF11 are disabled or have been replaced in order to
>support the SC02.  DEC didn't support RK06/7 on QBus so none of the
>standard bootstrap ROMs support it.  The SC02 has its own, however,
>although it's very simple, and that's what you're seeing.  It will
>expect a simple two-letter mnemonic (DM for your emulated RK system)
>with an optional unit number (eg "DM", "DM0", or "DM1").
>
>Interesting number of serial lines on there.  8 on the DLV11-Js, and
>two on the CPU (one of which is the console, as you've clearly
>discovered).  I'd guess this used to run RSX-11M.

Or uRSTS or RT11/TSX, or even RT11 and did data collection.



Allison