test-drb

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101090 discussions

by lyokoboy0＠gmail.com

Hello, The person that refered me to my present job at a datacenter passed away this past monday. He was a hardware / software engineer for modcomp computers. He left me all of the computers and documents. there are too many books to keep, stuff concerning the modcomp computers that is not saved anywhere else that i can tell. I have picked up storage containers for all the books, and i can scan it all. after that, its all probally going in the recycle bin, as i dont know where or how i would keep such a large pile of paper manuals on hand. what is the prefered format to upload things to bitsavers in? is pdf acceptable? How can i create a pdf that is not too big on file size? Can the text be recognized and be made searchable within the scanned pdf? any input would be appreciated, Thanks. --Devin D.

4 years, 1 month

DEC KM11 (Was: DEC KL11)

by jnc＠mercury.lcs.mit.edu

> From: Mark Kahrs There's a typo in your original Subject: line: the KL11 is a very early UNIBUS (probably the very first UNIBUS device ever, looking at the board's Mxxx number) asyn serial line interface: https://gunkies.org/wiki/KL11_asynchronous_serial_line_interface > manx tells me that these documents were known to exist: > .. > But they are not online. I couldn't find out anything about the KM11 with a Web search, but I did see that it's in the DEC PDP-11 fiche set. My set does have the KM11 Tech Manual. I've never heard of the KM11, and as I said, there's nothing about it online. Is it worth doing a CHWiki page for it? (With the fiche, it would be pretty easy to whip up one covering the basics: functionality, component boards, etc. > So I can't say whether they are 18 bit compatible. Huh? The KM11 doesn't plug into the UNIBUS (or QBUS); it's a MASSBUS device (a solid-state storage device, actually), so it plugs into an RH11 or RH70 or something like that. (I should work with the VAX MASSBUS controller, too.) So the question 'is it 18 bit compatible' makes no sense. Noel

4 years, 1 month

microvax/vs 2000 expansion base circuitry ?

by kiwi_jonathan＠yahoo.com

I've read that there is circuitry in the expansion base (BA40A?) has circuitry . Does anyone know what the circuitry does? Is it required for SCSI operation? (I hope not, or I'll have to kludge one up to make use of pk2k SCSI boot-roms!)

4 years, 1 month

DEC KM11 (Was: DEC KL11)

by jnc＠mercury.lcs.mit.edu

> From: Paul Koning > But the sector format is a different matter. If it's designed for > PDP-11 and friends, presumably it has a 512 byte sector size. For > PDP-10 or -20 use you'd presumably want a sector size consisting of > some round number of 36 bit words. Actually, the -10/-20 MASSBUS situation is even more complicated than that. The MASSBUS can operate in 16 or 18 bit data width (for everyone else; this is totally different from the Q16/Q18/Q22 of the QBUS, which is _address_ width), so it can support 36-bit words directly, using two extra data lines. So for the RP04 and other disks, and their 'controllers' (at least, the part that's in the device), they have to be able to turn the bit-stream from the mass storage device into 18-bit wide words. (And they actually have different sector formats depending on whether they are in 16- or 18-bit mode.) What the KM11 does, I don't know (I'm too lazy to go look at the TM); I would not at all be suprised to find that it can _only_ operate in 16-bit mode (i.e. the array of memory chips is 16 bits wide, and it just ships a line at a time from that out in parallel, so there's no way to even produce 18-bit wide words). The name of the device (KM11) adds weight to that supposition. Noel

4 years, 1 month

No subject

by aaron＠aaronsplace.co.uk

Subject: Re: PDP-11/73 boot issues References: <87ilytoikj.fsf at carbon.nat.rhwyd.co.uk> <CADBZjLYN9aUTDHJ6=XJwNnNefTUbzyZis4evRS1Coy2r9xcX5w at mail.gmail.com> <87fstxohuj.fsf at carbon.nat.rhwyd.co.uk> <edde8fc9-6e38-3215-970f-34b9f3a95ce0 at alembic.crystel.com> <21789e85-2aa4-3b61-db31-b21fd8c08a03 at dunnington.plus.com> <87czp1obv4.fsf at carbon.nat.rhwyd.co.uk> User-agent: mu4e 0.9.18; emacs 27.2 In-reply-to: <87czp1obv4.fsf at carbon.nat.rhwyd.co.uk> Aaron Jackson via cctalk writes: > Pete Turnbull via cctalk writes: > >> On 21/09/2021 20:34, Chris Zach via cctalk wrote: >>> Can an MXV11 be used in a 22 bit system? I thought it was an 18 bit >>> device? >> >> MXV11-B is 22-bit. MXV11-A is 18-bit but supposedly can be used in a >> 22-bit system if the RAM is disabled. > > Yeah this is a 22 bit card. Josh sent me an xxdp image which I could > easily boot from my scsi2sd (thanks!). Seems to be reporting an error > with the CPU unfortunately: > > ]] .R ZKDJ?? > ]] ZKDJB2.BIC > ]] > ]] ERROR WHILE TESTING BOARD FUNCTIONS > ]] ERROR # =001166 > ]] ERROR PC =040662 > ]] 043632 > > This happens regardless of whether W9 is installed or not (supposedly > disables the LTC register on the CPU?) > > I'll see if I can borrow another CPU card form a friend this > weekend. Unless anyone else has any ideas? Another suggestion on IRC > was to disable the PSU LTC and enable the LTC on MXV11 but will need to > look up some details on how to do this. Had a nice cycling trip this evening to pick up a spare 11/73 card. Unfortunately it did not fix my issues so I'll have to do some more digging. Has anyone disconnected the BEVENT line and used a signal generator to provide the LTC? Curious to try this to figure out if mine is just being noisy or something. Thanks, Aaron

4 years, 1 month

Setting up a VMS system

by compoobah＠gmail.com

On Wed, 2021-09-22 at 12:00 -0500, cctalk-request at classiccmp.org wrote: > Currently the Hobbyist Program covers Alpha and Itanium.? We?ve been > told it will cover x86 at some point.? I for one can?t wait for x86, > as I don?t really want to add an Itanium to run some of the newer > software. > > Zane Not even that... looked at the VSI stuff and it is only the newest Alphas that are supported. 21064/21164 and, I believe, 21264 are not supported by any release licensed by VSI, and they changed the PRODUCER key so you can't use those PAKs on DEC/CPQ/HP variants of VMS. HP stopped issuing new hobbyist PAKs back very early in 2020. I put in for a renew March or so and never got it. They were so disinterested in the program that they didn't mention stopping it, so I guess it isn't surprising that the page is still up. Isn't VMS DCL pretty close to RSX? Never used RSX, but that is what I was always told. Anyway, good system, pretty solid, expect to do a LOT of typing for commands if you're used to UNIX, and don't put any VAX with a public DCL account on the Internet because there is a huge security hole in DCL that was never fixed for VAX.

4 years, 1 month

Setting up a VMS system

by classiccmp＠philpem.me.uk

Hopefully a few of the DEC/VMS fans here might be able to help! I'm on a bit of a quest. I've been given some old VAX/VMS software -- a cross compiler and some source code -- that I'd like to get running. My goal is to get the source code building and experiment with the compiler a bit. Problem is that I've never used VMS before, and don't have a clue how to install or use it. Can any point me to an idiot's guide to VMS, how to set it up and make it possible to send files to it from my Linux box? I'm thinking of using SIMH, unless there's a better emulator available. I'm still waiting on a reply from HP with a hobbyist licence PAK (I've filled out the form), but I figure I can get started on the learning while I wait. Cheers Phil.

4 years, 1 month

BC19S

by doc＠vaxen.net

Hi, Chris, Where are you, and how long is that cable? I believe that I have a spare that's around 18". As luck would have it, I'm moving, and today I'm sorting and culling the graphics cable tub anyway. If I have a spare I'll save it out. Doc

4 years, 1 month

Seeking DEC BC19S (VS2000 color video/keyboard/mouse) cable

by cmhanson＠eschatologist.net

I now have a 4-plane color graphics card for my VAXstation 2000, and I'd like to actually connect it to a display. Does anyone have a DEC BC19S cable that needs a good home? For reference, this has a DA15F connector on one end that plugs into the VAXstation, which leads to a box that screws into the back or base of a display and has the RJ11 and Mini-DIN-7 jacks for keyboard and mouse, and then has three short BNC cables coming out of of it for color video. I have the parts to make a breakout box if I have to but that'd be more of a pain than giving someone money and having a thing arrive in the mail. :) -- Chris

4 years, 1 month

DEC KL11

by mark.kahrs＠gmail.com

A few details for the curious: It's housed in a BA-11 box with 3 controller cards. The Massbus paddles fit into that box and terminate in flat ribbon cable, not the massive cables. The DRAM chips are 4116s. manx tells me that these documents were known to exist: PartTitleStatus EK-0ML11-TD *ML11 Technical Description <https://www.vt100.net/manx/part/dec/ek-0ml11-td/>* EK-0ML11-TM *ML11 Technical Manual <https://www.vt100.net/manx/part/dec/ek-0ml11-tm/>* EK-0ML11-UG *ML11 User's Guide <https://www.vt100.net/manx/part/dec/ek-0ml11-ug/>* But they are not online. So I can't say whether they are 18 bit compatible.

4 years, 1 month

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