test-drb July 2012

test-drb@ccmp.vtda.org

196 participants
250 discussions

by cube1＠charter.net

I agree, but only because RL's and an 11/23 are pretty light. Change that to an 11/34 in a 10.5 inch box and a couple of rk05's and, over the years, things might sag over time - the posited fat people would not be sitting there day after day all day long. The analogy I usually think of is a water bed in an older house. The extra plywood helps, and is may also be helpful to have heavy systems along a side, rather than in the middle of the floor. Since I am not a structural engineer or anything like that, I guess it might depend on the spacing of the joists and the subfloor construction, and, on the sides, what kind of loads the walls are designed to bear. (In my case, my collection is on my basement concrete floor, and most of it is along the sides.) mcguire at neurotica.com wrote: > > You are not even remotely in dangerous territory here. > > For some perspective, think of a sofa with "feet", with two or three fat people on it. > > -Dave > >-- >Dave McGuire, AK4HZ >New Kensington, PA > > >On Jul 28, 2012, at 4:51 PM, Earl Evans <earl at retrobits.com> wrote: > >>> This conversation has started to worry me about the PDP-11/23 system in my >> daylight basement/family room. It's the largest single room in our home, >> and on the bottom of three floors. It is a wooden floor, with (large) >> crawl space underneath. >> >> The configuration is a PDP-11/23 in a BA23 chassis, 2 RL02 drives, and the >> standard DEC rackmount cabinet (which is pretty heavy itself). The entire >> cabinet has been placed on a 2 foot by 4 foot piece of half-inch plywood to >> evenly distribute the load. It is located near one of the load-bearing >> external walls of the home. >> >> RL02 drives weigh 75 lbs by themselves. Does anyone have a rough guess on >> what the total weight is for the system I described, and whether or not >> this would be safe for residential basement wood flooring? I realize there >> are a lot of factors - I'm just trying to get a wild guess before I start >> getting panicked. >> >> Thanks, >> >> - Earl >

13 years, 1 month

TU58 emulator

by cube1＠charter.net

One thing you should also consider is the weight loading you are going to put on your attic, and how it is distributed, less your ceiling sag over time. Camiel Vanderhoeven <iamcamiel at gmail.com> wrote: >Hi Everyone, > >I'm thinking of a way to move as many of the PDP11 systems I have into >my attic office to a) get them going, and then b) run them >occasionally. > >I've stripped the two low corporate racks to the chassis, and if I can >find a helping hand, I'm sure I can get them into the attic, then put >the tabletop of my electronics workbench on top of it (I'm a little >short on space). I'm thinking of bolting two pieces of rack profile to >one side of each rack, which would turn them into a single unit >comprising three racks. That way, I should be able to mount 6 10.5" >PDP's and 6 5.25" PDP's, and have them conveniently close to my >oscilloscope and logic analyzer to work on them. > >Now for storage... > >I have some RL02 drives, but I'm a bit reluctant to drag those >upstairs. I have Emulex scsi controllers for three of the PDP's (2 x >UC18, 1 x UC08), but the rest is without mass storage. > >I read about the TU58 emulator that runs on Linux, and I'm thinking of >putting a DECserver into the rack with the PDP11's, and use virtual >TTY's on a Linux box that connect to the PDP11's over the DECserver, >then run multiple instances of the emulator so each PDP has one or >more emulated TU58's. > >I know the "real" TU58 tapes can hold something like 256K of data. Are >the operating systems aware of this limit, or could you get by with >emulating a larger tape? > >Thanks for any insight you may have to offer. Warnings like "That's a >really bad idea, because..." are also very welcome. > >Cheers, > >Camiel

13 years, 1 month

free 30+ years collection of ham radio electronics components

by rdawson16＠hotmail.com

Im sure he wont mind if you email direct so I present Duane: Location is Minneapolis, and it all needs to go this weekend, he is retiring and selling the house: duane at icsi-us.com Randy

13 years, 1 month

Commodore C286-LT

by reiche＠ls-al.eu

Hi guys, Wanting to run the older Unices, I hunted around for a working 286. I sort of succeeded, except for the part that the sealant from the original Connor harddisk probably didn't get enough air where the laptop was situated for the past ten years and had gone fluid. Messy. Got me another harddisk, also an old Connor, not sure if it works but can't seem to find anything like a working DOS floppy with a FDISK.EXE which allows the removal of non-DOS partitions. A guy at work had a working copy of Partition Magic on floppy, but it seems to have a heavy case of floppy rot so it won't boot. So I was wondering, anyone have a floppy .img which I can rawrite or dd to a floppy to see if I can partition the old Conner or another 2,5" disk proper, so I can at least install MS-DOS onto it and maybe some old Unices later on? Thanks in advance and re, Sander

13 years, 1 month

cctalk Digest, Vol 107, Issue 64

by elson＠pico-systems.com

Date: Sat, 28 Jul 2012 03:50:18 -0400 From: Paul Anderson <wackyvorlon at me.com> To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> Subject: RSX-11/M and FORTRAN Message-ID: <28A40D7C-F30F-48CF-A06E-F3A1EBFCBF3C at me.com> Content-Type: text/plain; CHARSET=US-ASCII I've developed the itch to play with RSX-11/M, so I've setup simh using these instructions: http://home.earthlink.net/~n1be/pdp11/PDP11.html So far, so good. I've got it up and running. The problem is in trying to run fortran. There's a FOR.OLB in db0:[11,41]. When I try to run for, I get TASK NOT FOUND. When I run ins $for to load it, it reports not being to find the file. Being a total newbie at this, I'm not sure how to get it to run. Any ideas? As Jay says, .olb is the object library, which gets linked in with your compiled code to supply the fortran-specific library functions. There should be a FOR.EXE, I think, for the compiler. It's been a while since I ran RSX11/M. A LONG while, like 30 years! Jon

13 years, 1 month

NRI 832 Clock Not Working

by wackyvorlon＠me.com

I'm currently working on restoring a NRI 832 computer trainer. I finally got my oscilloscope on it. It looks like the clock isn't running. You can see the waveform in this video. I tried both the fast(250kHz) and slow(2Hz) clock. I'm just seeing noise from the power supply. http://www.youtube.com/watch?v=RBV4QgQHq98 Sent from my iPhone

13 years, 1 month

Emulex QD21 firmware

by brad＠heeltoe.com

I have two QD21's - one says rev F and the other says rev G, but both have E65G markings on the eeprom. I will plug them both in and verify shortly, but I would guess that means they are both G. Can I just use the rev J firmware instead? I assume J is 'better' than G... -brad -------- Original Message -------- Subject: Re: Emulex QD21 firmware From: Glen Slick <glen.slick at gmail.com> Date: Mon, June 25, 2012 9:25 pm To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> I have the following versions of firmware EPROMs for the Emulex QD21: E65C - 16KB E65G - 32KB E65J - 32KB There no text strings in the Rev C firmware and no on board Firmware-Resident Diagnostic. The Rev G firmware has the following on board main menu: Emulex Corporation Copyright All rights reserved QD21 controller, firmware revision level IP address = Option menu 1 - Format 2 - Format and verify 3 - Verify 4 - Read only test 5 - Data reliability test 6 - List known units 7 - Replace block 8 - Display Novram 9 - Edit / Load Novram Enter option number: The Rev J firmware has the following on board main menu: Firmware-Resident Diagnostic Copyright (c) 1988 Emulex Corporation all rights reserved QD21 controller, firmware revision level IP address = Option menu 1 - Self Test Loop 2 - Format 3 - Verify 4 - Format and Verify 5 - Data Reliability Test 6 - Format, Verify, and Data Reliability Test 7 - Read Only Test 8 - List Known Units 9 - Replace Block 10 - Print RCT 11 - Display Novram 12 - Edit / Load Novram Enter option number:

13 years, 1 month

B&C microsystems UP200 software

by clabond1＠tin.it

I am in need of software for the UP200 programmer. LMK if you have it and could send me a copy via email. Just picked up a unit and want to get programming. Grazie

13 years, 1 month

RSX-11/M and FORTRAN

by cube1＠charter.net

An OLB isn't an executable - it is the Fortran library. Time to go find some rsx doc and read up a little, maybe. Paul Anderson <wackyvorlon at me.com> wrote: >I've developed the itch to play with RSX-11/M, so I've setup simh using these instructions: > >http://home.earthlink.net/~n1be/pdp11/PDP11.html > >So far, so good. I've got it up and running. The problem is in trying to run fortran. There's a FOR.OLB in db0:[11,41]. When I try to run for, I get TASK NOT FOUND. When I run ins $for to load it, it reports not being to find the file. Being a total newbie at this, I'm not sure how to get it to run. Any ideas?

13 years, 1 month

RSX-11/M and FORTRAN

by wackyvorlon＠me.com

I've developed the itch to play with RSX-11/M, so I've setup simh using these instructions: http://home.earthlink.net/~n1be/pdp11/PDP11.html So far, so good. I've got it up and running. The problem is in trying to run fortran. There's a FOR.OLB in db0:[11,41]. When I try to run for, I get TASK NOT FOUND. When I run ins $for to load it, it reports not being to find the file. Being a total newbie at this, I'm not sure how to get it to run. Any ideas?

13 years, 1 month

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test-drb July 2012