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- Newsgroups: vmsnet.pdp-11
- Path: sparky!uunet!europa.asd.contel.com!darwin.sura.net!Sirius.dfn.de!math.fu-berlin.de!news.th-darmstadt.de!news
- From: PD82@brx.th-damrstadt.de (A.G. Schindler)
- Subject: Re: RT-11 help needed
- Sender: news@infoserver.th-darmstadt.de (The Usenet-News System)
- Message-ID: <1992Jul28.003246.6004@infoserver.th-darmstadt.de>
- In-Reply-To: chapman@cs.cornell.edu's message of Mon, 27 Jul 1992 15: 18:05 GMT
- Date: Tue, 28 Jul 1992 00:32:46 GMT
- References: <1992Jul27.151805.2692@cs.cornell.edu>
- X-News-Reader: VMS NEWS 1.20
- Nntp-Posting-Host: brx.hrz.th-darmstadt.de
- Organization: Technical University Darmstadt, Germany, Computer Center
- Lines: 73
-
- In <1992Jul27.151805.2692@cs.cornell.edu> chapman@cs.cornell.edu writes:
-
- +> I am trying to boot RT-11 (I have several versions: 5.1, 5.4, 4, 3b)
- +> on a pdp-11/20 (this is hobby stuff, not real work). Let me describe
- +> the system and what I have done, and perhaps someone can tell me if this
- +> is impossible to do, or what I am doing wrong.
- +>
- +> I have one RK05 drive attached via an RK11D, but could attach as many
- +> more as needed, and a tty33 for the console (via a KL11). Memory is 24K
- +> of core in an MF-11L. That is all that is currently attached.
- +>
- +> Previously, I have booted XXDP (diagnostic OS) by toggling in the RK05
- +> boot code by hand, putting the pack in the drive, and hitting start. The
- +> monitor comes up on the tty.
- +>
- +> When I do this with RT-11, the read light on the drive flickers a bit,
- +> it makes sounds as if it is seeking, and the processor continues to run,
- +> but nothing happens on the tty. After about a second the disk quiets down,
- +> but still no action on the tty. So I powered down, but on power up I got
- +> a message that looked like it was from RT11 saying that a power failure
- +> had occurred. What do I need to do, or do I need other hardware? I also have
- +> a collection of paper tapes labelled "RT-11 Sources" -- what on earth are
- +> these?
-
- 1.) If XXDP does run and ANY other system does not, it is very likely, there's
- something wrong with youe interrupt configuration, as XXDP does not use
- ANY interrupt (it simply polls, this is why everyting You do on floppy
- lastst so veeery long)
-
- 2.) 11/20, the first of all commercially sold 11's has some nasty habits
- about dealing with auto-increment/-decrement, it has no EIS and the
- priority of harware traps is slightly different to the modern types.
-
- 3.) The disks start to work, this shows, that (parts of) the boot procedure
- is/are coming up. If the disk lamp is flickering only short time (2 sec
- or less), the system is not atually booted up, but dying inside the
- primary or secondary boot. If the flicker lasts longer, You should
- ALWAYS get a startup Message as <RT-11 Vxxx>. After issuing this
- Prompt, the system executes START?.COM. If You don't get any console-
- message, check if You are booting a customized system with all
- startup messages disabled. Many systems used in factory-control are
- customized like this !
-
- 4.) Maybe the ammount of memory (24k) does not match a SYSGEN special
- feature, which allows to enable the lower 2 kW of I/O page to be
- used as additional memory. This was common use in 32 kW RT11SJ
- systems on Q-Bus machines (and only there!), where free memory was
- always rare.
-
- 5.) Put the "Source Tapes" in Your Gemm's-Box, togeter with the other
- precious ancient things (but avoid to use them).
-
- Moral: If You have the resources, try to boot a virgin system,
- preferably RT11SJ, the single job monitor, which behaves
- very friendly.
-
- Your's Andreas
-
- +-------------------------------------+----------------------------+
- | Andreas G. Schindler | ^ ^ The best |
- | c/o IID Schindler & Schubert GbR | (O v O) is yet |
- | Lammertsgasse 12 , D-6140 Bensheim | /( )\ to come |
- | Tel: 0 (49) 6251 62081 | ======""===""====== |
- | Net: pd82@brx.hrz.th-darmstadt.de | |
- +-------------------------------------+----------------------------+
-
- +-------------------------------------+----------------------------+
- | Andreas G. Schindler | ^ ^ The best |
- | c/o IID Schindler & Schubert GbR | (O v O) is yet |
- | Lammertsgasse 12 , D-6140 Bensheim | /( )\ to come |
- | Tel: 0 (49) 6251 62081 | ======""===""====== |
- | Net: pd82@brx.hrz.th-darmstadt.de | |
- +-------------------------------------+----------------------------+
-