home *** CD-ROM | disk | FTP | other *** search
- Newsgroups: comp.sys.dec.micro
- Path: sparky!uunet!world!mbg
- From: mbg@world.std.com (Megan B Gentry)
- Subject: Re: Micro PDP 11
- Message-ID: <BznHn7.A5F@world.std.com>
- Organization: The World Public Access UNIX, Brookline, MA
- References: <1992Dec14.021941.676@lunatix.uucp>
- Date: Tue, 22 Dec 1992 07:47:31 GMT
- Lines: 36
-
- mfroedge@lunatix.uucp (Maxwell Froedge) writes:
-
-
-
- >1. Where can I find software and documentation for these guys?
-
- Of course, you can find them through DEC. The RT-11
- order number is QJ013 (or at least it was, last time
- I looked). Most recent version is V5.6, released
- earlier this year.
-
- >2. Can I change the floppies to 1.2 meg drives. I seem to
- >remember a DEC PDP with a 1.2 meg floppy.
-
- If you mean the RX33 - yes, as long as you have an
- RQDX3 interface.
-
- >3. These are 11/23 processors. I have 256K NEC 3rd cards
- >installed. What is the maxium memory these support (both the NEC
- >cards and the 11/23 processor.) The system is a Q-bus.
-
- There are two things contributing to whether your
- system is 18-bit or 22-bit. First, the CPU. If you
- have a KDF11-B (quad-high module), you have 22-bit
- support on-board. If it is a KDF11-A (rev.c), you
- also have 22-bit support. KDF11-A (rev.a) is 18-bit
- only. Second, the backplane. Since you mentioned they
- are MicroPDP-11's, I know they do have 22-bit support.
- The backplane is Q-CD for the first three slots and
- 'zig-zag' q-q for the remaining slots.
-
- In a 22-bit machine, you can have up to 4mb of memory.
-
- Megan Gentry
- (RT-11 developer of 15 years)
-
-