PDP11/23 - prompt?

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: anyone 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. 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.