test-drb April 2019

test-drb@ccmp.vtda.org

134 participants
129 discussions

by charlesmorris800＠centurytel.net

I sometimes use vtserver to download disk images to the RL02's on my PDP-11/23+. Takes quite a while at 9600 baud, too :) But there is some kind of bug that always appears at the same point, in the middle of the next 100K block after "6600K written". The data transfer stops (no more head motion/ready light flicker on the RL02), and the character that vtserver uses to indicate a write operation just repeats endlessly and rapidly until I kill it. Does anyone else encounter this limitation, and if so, how did you fix it? Fortunately I haven't wanted to image a disk that's more than 2/3 full so far... I make sure to squeeze the disk in SIMH before transferring the image. But it'd be nice to be able to image a full (10 MB) RL02 and not have to worry about it failing. Any ideas? thanks Charles

6 years

Ultrix 3.0 VAX

by johnforecast＠comcast.net

Dennis, It sounds like you are looking for an Ultrix 3.0 standalone boot tape. While I found a number of people who claim to have a physical tape, with some claiming to have imaged the tape, I was unable to find an image on-line. That being said, it?s possible to use the Ultrix 2.0 standalone bootable tape (AQ-JU00C, available from bitsavers.org) with a couple of edits at the end - I did this to get 2.2 up and running. Since Ultrix 2.0 only supports a limited number VAX processors, the first stage has to be run on one of those processors, I always use microvax2. Subsequent stages may be run on any processor supported by Ultrix 3.0. Stage 1: I use the following .ini file: # Boot from standalone tape. This MUST be performed on a microvax2 instance. set rl dis set ts dis set rq0 ra81 att rq0 system.dsk att tq0 AQ-JU00C-BE_ULTRIX-32_2.0_SA_87.tap set tti 7b set tto 7b boo Attach the Ultrix 3.0 supported tape to tq0 when it asks. This stage will create the root partition and restore from the tape. No special handling at this point, just answer the questions as for a normal install. Stage 2: Use the VAX simulator for the target system (I used vax780) and boot rq0. After answering some questions it will fail trying to create a file system on /dev/rra0 which doesn?t exist - you need to edit /.minidevice as follows: # ed .minidevice 22 1 RA81 ra 0 TK50 tms 0 s/0/0g RA81 ra 0g TK50 tms 0 w 23 q Reboot the system and it will create a file system on /dev/ra0g, copy the base packages along with any you have selected and build a custom kernel. After all this reboot again and it will drop you into single user mode after complaining about "Can't stat /dev/ra0ga?. Edit /etc/fstab: # ed /etc/fstab 54 1 /dev/ra0ga:/:rw:1:1:ufs:: s/0g/0 /dev/ra0a:/:rw:1:1:ufs:: w 53 q Reboot again and you should have a functioning system. John.

6 years

SIMH question

by charlesmorris800＠centurytel.net

This may be a silly question... but how can I transfer a text file from my PC into SIMH for PDP-11? Is it even possible to create a disk or tape image from source code? Attaching files requires them to be images... I have significant changes to make to TSGEN.MAC (TSX-Plus definitions file) and it will be MUCH easier to edit it on my laptop with a screen editor, than in SIMH (or on the real hardware) using the line editors! The only method that comes to mind is to start the actual 11/23+, open the text editor for input, then use a terminal program like Teraterm to "play" the file as though I were typing it in. But I don't have the rest of the TSX-Plus source files, linker, etc. so I would have to transfer them using VTserver anyway... thoughts? thanks Charles

6 years

SIMH question

by jnc＠mercury.lcs.mit.edu

> From: Glen Slick > when I wanted to assemble some code with the RT-11 assembler but wanted > to edit the source code elsewhere and then transfer the code into a > SIMH disk image. Someone should write the SIMH equivalent of Ersatz-11's 'DOS device' (which allows the -11 access to the file system on the host - and also the ability to send arbitrary commands to the emulator). I find it mind-bogglingly useful for going round the edit-compile loop, while using a good editor (Epsilon for me) on the host OS. Having written a Unix driver for the device, I have a sack of Unix commands that use it, e.g. to retrieve the file foo.c from the host, I just say 'hrd foo.c' to the PDP-11 Unix's shell, and it's there. Super-painless, and does't add any noticeable amount of time/work to going around the loop. I don't need to give the full file name since there's also 'hcd <dir>'. To change the switch register contents, 'sc <value>'. Etc, etc. How all you SIMH users manage without it is beyond me. Luckily I only need -11 emulation, so I don't have to put up with life without it - and would refuse to. If anyone is seriously interested in adding it to SIMH, there's an -11 device spec available; I strongly suggest using the same spec; then for Unix, at least, all the -11 code (driver, user commands) is already done. Noel

6 years

RK611 Technical Manual needed

by jnc＠mercury.lcs.mit.edu

Anyone have a copy of the RK611 Technical Manual (EK-RK611-TM-001 is the version that's attested)? It's not online. (I have a copy in my fiche set, but my fiche reader died - no, it's not the bulb, already changed that! :-) Noel

6 years

Infocom mystery binary

by dave＠661.org

In one of the repositories of Infocom game source code recently uploaded to Github, there's an executable that appears to have come from an m68k Unix machine of some sort. It's at https://github.com/historicalsource/zork-german/blob/master/zap. Over at intfiction.org[1], it was initially claimed to be from a Macintosh. Then I suggested it was from a pre-Sparc Sun machine. Then someone else suggested it was from A/UX. Does anyone know anything more conclusive? I based my idea on what I got from running strings(1) on the file. Copyright (c) 1987 Apple Computer, Inc., 1985 Adobe Systems Incorporated, 1983-87 AT&T-IS, 1985-87 Motorola Inc., 1980-87 Sun Microsystems Inc., 1980-87 The Regents of the University of California, 1985-87 Unisoft Corporation, All Rights Reserved. [1] https://intfiction.org/t/infocom-source-code-posted/41156/23 -- David Griffith dave at 661.org A: Because it fouls the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing in e-mail?

6 years

micropdp11 and virtual memory

by dj.taylor4＠comcast.net

I've been compiling and running some Fortran programs on my microPDP11/53 computer and have questions about Fortran VIRTUAL arrays. Details: KDJ11-D/S cpu with 0.5 MB of ram, additional 1MB of Qbus ram.? I'm running RT11 V5.7 ZM and using the F77XM compiler, version 5 (I think). What I am seeing is that when I use VIRTUAL arrays instead of the usual memory below 64K the run times are dramatically slower.? Is this normal? Could it be something else?? The other memory board?

6 years

Televideo 925 character rom dump

by derschjo＠gmail.com

Hi all -- I'm working on a Televideo 925 terminal with a few problems, one of which is a bad character generator ROM, (a MOS 2332). Does anyone have a dump of this already, or have a working 925 they'd be able to dump the ROM from? Thanks in advance, Josh

6 years

Need part for Sun 2/129

by earl＠baugh.org

I?m in the process of restoring a Sun 2/120 and realized that the unit I have doesn?t have the back plate and cables for monitor and keyboard/mouse. I have spare parts to trade for 2/120 ( including a sun 2/120 keyboard cable I found today. ) or can do $$ Earl Sent from my iPhone Sent from my iPhone

6 years

Telex 20 Meg 10 platter very heavy monster drive needed drop line off list..r

by couryhouse＠aol.com

Thanks? Al? ?yes, that? is? the? one. and? as? I? recall? ?ISS? was a? ?offshoot? on? ?univac Do? ?you? have? any? Thanks Ed# In a message dated 4/22/2019 11:34:58 AM US Mountain Standard Time, cctalk at classiccmp.org writes: Thanks? Al? ?yes, that? is? the? one. and? as? I? recall? ?ISS? was a? ?offshoot? on? ?univac?In a message dated 4/22/2019 11:21:50 AM US Mountain Standard Time, cctalk at classiccmp.org writes: On 4/22/19 11:05 AM, ED SHARPE wrote:> Al,? the? drive? ?you mention at? its? largest? ?was? 7.5 meg? and? 6? platters... not? ? the? ?one Telex bought their drives from ISS.You're looking for a ISS 714 (ca. 1970) 2314 compat.https://ia800608.us.archive.org/15/items/TNM_Information_Storage_Sys… aek at bitsavers.org;cctalk

6 years

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test-drb April 2019