test-drb

test-drb@ccmp.vtda.org

101090 discussions

by jnc＠mercury.lcs.mit.edu

> From: Liam Proven > It boots, and with a borrowed mouse, GUI apps work There was a new blog post which I don't think was mentioned here yet: http://www.righto.com/2016/10/restoring-ycs-xerox-alto-day-10-new.html but it doesn't cover the borrowed mouse; does cover getting the CPU 100% working, though. Noel

9 years, 6 months

Xerox Alto restoration, part 10

by lproven＠gmail.com

It boots, and with a borrowed mouse, GUI apps work https://www.youtube.com/watch?v=GMp5EAq-Elo -- Liam Proven ? Profile: http://lproven.livejournal.com/profile Email: lproven at cix.co.uk ? GMail/Twitter/Facebook/Flickr: lproven Skype/MSN: lproven at hotmail.com ? LinkedIn/AIM/Yahoo: liamproven Cell/Mobiles: +44 7939-087884 (UK) ? +420 702 829 053 (?R)

9 years, 6 months

FS (cost of shipping): AS/400 8-port twinax concentrator/adapter cables

by jtp＠chinalake.com

I have two IBM 21F5093 AS/400 8-port twinax to DB25 adapters with clip mounts. Looks like the coil is about 14-16 feet of cable. Pics on request. Free for the cost of shipping (01888 metro-west Boston,MA , about 3 lbs each) Need the space, gotta go.

9 years, 6 months

VTServer/etc for V6 Unix

by jnc＠mercury.lcs.mit.edu

> From: Warren Toomey wkt at tuhs.org > To load V6, you need to build a virtual tape which replicates the V6 > tape. Err, there's the problem. The V6 boot tape consists of 3 'dd' images of RK05 V6 file systems (one each root, source, and doc), with a 'boot block' on the tape which can copy them to RK05 packs; there is no standalone 'mkfs', etc. Now, if I were willing to wait for the transfer of the entire 4K blocks, I could use that approach, but... my only working mass storage device (currently - more on the way, at some point) is an RX02 - much smaller. So I _can't_ go that way, my only choice is to replicate the V7-type process (stand-alone 'mkfs', etc), for V6. Although I suppose I could use an emulator (I have been using Ersatz-11 to run V6 for quite a while now) to produce a RX02-sized file system, with just the stuff it needs to boot ('init', 'sh', etc), and use VTServer to transfer that over. And I'd probably have to tweak the client-side code to write raw images to disk (not sure if it already knows how to do that). > the problem is that both "boot" and "vtboot.pdp" contain the > client-side code to talk to the server, and it seems that I didn't > supply the source code for this. > ... > Hah, the file .. v7_standalone.tar.gz has the source code for the > standalone tools Yup, found that some years back when I first found VTServer. > Alternatively, if you have a working V6 environment (e.g. a simulator), > you could bring in the vtclient.c code and integrate it into the V6 > boot binary. The only V6 boot mechanisms are 1-block programs that go into block 0 of device 0 and which boot Unix directly from that file-system (type a file name, and it loads that file and starts it). So there is no second-stage boot program to integrate the VT client into (although obviously I could port the second-stage bootstrap to V6). > From: Ian S. King > I know I made it work and booted V6 on my 11/34. I'll start with getting VTServer to run under V6 (my only Unix, don't have anything later :-), so if you turn up whatever you used to boot V6, it would probably still be useful. Noel

9 years, 6 months

VTServer/etc for V6 Unix

by wkt＠tuhs.org

Hi all, an early version of VTServer is still at: http://www.tuhs.org/Archive/PDP-11/Tools/Tapes/Vtserver/ I think some others took it and extended; Fred van Kempen springs to mind. To load V6, you need to build a virtual tape which replicates the V6 tape. Hopefully this is easy to do. However, the problem is that both "boot" and "vtboot.pdp" contain the client-side code to talk to the server, and it seems that I didn't supply the source code for this. I'll go home and dig through my old stuff and see what I can find. Cheers, Warren

9 years, 6 months

VTServer/etc for V6 Unix

by jnc＠mercury.lcs.mit.edu

> From: "Ian S. King" > ISTR that one can generate a 'tape' config file with whatever components > you want/need. Right, I saw that, but I need the V6 components... > I know there are v6-specific tools somewhere ... I think it's somewhere > in the TUHS site, and not completely obvious so you have to hunt a bit. Any hints you could provide would be most gratefully received. I looked in the source tree, and doing a search for "mkfs" only turned up the normal V6 mkfs. (Note that for the V7 one, the source for the standalone and Unix versions is one file, which has #ifdefs. That seems to be the one that's in the VTServer tree.) I had a pretty extensive walk through the archive 'back when' I first found out about TUHS, and I don't think I saw V6 versions (I would likely have grabbed them, if I had); I did find (and grab) VTServer, along with a bunch of other stuff. I just took another quick skim, couldn't find them. I would have guessed that they didn't exist, since that whole method of putting Unix on a machine didn't exist until V7, so it wouldn't have been written 'back in the day'. Noel

9 years, 6 months

VTServer/etc for V6 Unix

by jnc＠mercury.lcs.mit.edu

So, I'm trying to do what VTServer was invented for - load Unix into an actual PDP-11, over its serial line, when one doesn't have machine-readable Unix on any mass storage for the machine. However, all the initial code that VTServer loads ('mkfs', etc) is V7-specific (V6 has a slightly different file system format) - and I want to install V6. Has anyone ever tweaked the programs which VTServer loads to do V6-format filesystems? I did a quick Google, but didn't see anything. No biggie if not, it won't be much work to adapt them all, but I figured I'd try to avoid re-inventing the wheel... Noel

9 years, 6 months

MASSBUS disk emulator (Was: Unibus controller for MFM disks)

by jnc＠mercury.lcs.mit.edu

> From: Rich Alderson > There have been 2 generations of Massbus Disk Emulator (MDE) at LCM. Thanks for the bits... very interesting. > Data was transferred via FTP over a 100baseT crossover cable connected > to a Slackware server; the Rabbit was able to keep up with 4 drives at > this speed Were the bits actually stored on the Slackware server, or was it just used to put bits on the 'drive' to start with? If the latter, what were the actual bits stored on? (I know, not that relevant, since this is the prior rev, but I'm curious.) > a Mesa 5i22 Anything I/O card (includes a Xilinx Spartan-III FPGA) that > plugs directly into the PCI bus in a server-class X86-64 box, and used > a revision of a separate driver/receiver card designed for MDE 1.0 to > connect to the Massbus Let me make sure I understand this; was there some sort of cable or somehow a connection from the Mesa 5i22 directly to the driver/receiver card, which was purely 'level conversion', with the Mesa doing the 'protocol' on the MASSBUS? (I.e. they didn't communicate over the PCI bus?) > a control program for the PC side which runs under Windows 2008/2012 > Server. So the actual bits are stored on something (disk?) controlled by the PC? Noel

9 years, 6 months

11/35 on eBait

by glen.slick＠gmail.com

On Oct 2, 2016 11:03 AM, "Noel Chiappa" <jnc at mercury.lcs.mit.edu> wrote: > > So there's another 11/35 up on eBait: > > http://www.ebay.com/itm/142135416325 > Went unsold at $3500. Relisted, this time at $5000. Buy it this time before it goes up to $6500 next time??? http://www.ebay.com/itm/142146207101

9 years, 6 months

Comdyna GP-6 Analog Computer Repairs Needed

by bill.phillips＠christovalisd.org

I have a Comdyna GP-6 analog computer that I need repaired ASAP. Anyone available to help me out? Bill Phillips wcphillips at verizon.net

9 years, 6 months

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