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101090 discussions

I want a front panel for my lsi 11 w/switches and lights

by jnc＠mercury.lcs.mit.edu

> From: Ed Sharpe > I want a front panel for my lsi 11 w/switches and lights! That's going to be a little tricky. The LSI11 obvously doesn't have a hardware interface on/in the CPU which would allow a lot of the functions traditionally found in a front panel (e.g. examining registers, single step, etc). Some of them can be done (e.g. a halt/run switch, which LSI-11's already support), and others could be 'sorta' done - e.g. if the CPU is running, DMA could be used to read/write memory locations. Probably the best way to have an emulated front panel is to build a board that i) emulates the system serial console on the QBUS (i.e. responds to 177560-6), and ii) has a micro or something which uses ODT to emulate the full range of normal console commands, and drives a set of LEDs and switches. E.g. hitting the 'continue' switch when the processor was halted would issue a 'P' command to ODT; when the 'halt' switch is raised, it would read the PC printed when the CPU halted, and display that in LEDs, etc, etc. Sounds like an amusing project for someone. Any takers? :-) Noel

9 years, 9 months

Imaging RX02 disks for simh (was: Re: MU-BASIC V2 and RT-11 V03B distribution disks.)

by thebri＠gmail.com

How the heck do you copy an RX02 disk for use in simh? I've been trying to transfer RX02 images between simh and a real PDP11 (that has only two RX02's, console, and ethernet). So far, I've only attempted sending an RX02 image from the PDP to simh, but simh fails to read it: "?DIR-F-Invalid directory". Even after adding 13*512 bytes to the start for the missing track, I still get invalid directory. My process is to COPY/DEVICE/FILES DY1:/START:0/END:330 DY0:BLOCK1.DAT, then FTP that off the PDP, delete the file, and do the remaining two thirds of the disk. Once all are transferred, "cat *DAT > floppy.dsk". I can transfer RX50 images using the same recipe, though I haven't tried sending an RX50 image created on simh back to the PDP. For what it's worth, I'm having the same problem with Alan Baldwin's TCP/IP disk images from http://shop-pdp.net/rthtml/tcpip.htm. simh can't read the individual DSK images, but could read the *.PKG with the disks inside, and >from that, I could (RT-11) MOUNT each disk to a logical device. b On Thu, Jan 28, 2016 at 11:50 AM, Mattis Lind <mattislind at gmail.com> wrote: > I found some 8 inch floppies with distribution kits for MU-BASIC V2 and > RT-11 V03B. I imaged those and put them here > http://www.datormuseum.se/documentation-software/rx01-and-rx02-floppy-disks > if anyone is interested in playing with MU-BASIC. There are both RAW disk > images and to be used in SimH and like and also DMK/IMD files. > > The system that floppies came with is this little ( > http://www.datormuseum.se/computers/digital-equipment-corporation/pdp1103-l > ) > system once used at Scania in S?dert?lje. >

9 years, 9 months

I want a front panel for my lsi 11 w/switches and lights

by COURYHOUSE＠aol.com

I want a front panel for my lsi 11 w/switches and lights! Ed# _www.smecc.org_ (http://www.smecc.org)

9 years, 9 months

DEC TU81 - "Logic Off" permanently illuminated-

by u.tagge＠gmx.de

Hi All, maybe someone can help me to bring my TU81 back to life again. I have checked the following, before turning on: - All capacitors on the Mail Power Supply and the one below the vacuum pump are fine > OK - Voltages check > OK - Fuses > The Fuse for the diagnostics power connector was burned: changed Problem is, that the "Logic Off" is constantly illuminated, after turning on. I had a look into the Tx81 Pathfinder documentation, and checked the following. - Check if Blower is running > OK - Disconnecting all DC connectors > Same result Pathfinder tells me changing the power supply. I hear only an relay clicking when turning on the Power Supply, also, when nothing is connected, in this time the "Logic Off" light blinks one time. I think, that the power supply checks itself that the voltages are OK, and that this fails. Any hints or tips? Many Greetings Ulrich

9 years, 9 months

Another passing ... Ray Tomlinson

by cctalk＠snarc.net

http://www.techrepublic.com/article/email-inventor-ray-tomlinson-dies-at-74/

9 years, 9 months

VCF SE 4.0 Announcement

by earl＠baugh.org

Many of you may have heard about this already, but to make sure everyone knows, We are proud to announce the fourth annual Vintage Computer Festival Southeast (VCFSE) in Roswell GA. The Festival, on April 2nd and 3rd, features over 35,000 square feet of exhibits, museums, presentations, and interactive entertainment. Exhibitors are available for live demonstrations and offer attendees the unique opportunity to experience a true piece of technology history. New this year, a live auction offers bidders a chance to start or expand their personal collections. (Registration is still open, visit the link at the bottom if you'd wish to exhibit -- vendors are also welcome) The Festival offers very popular hands-on electronics projects for children and adults. Gaming fans will enjoy a wide array of vintage video game consoles in a retro gaming section, where visitors can play classic games. Gamers of all ages are encouraged to test their vintage gamer skills on a huge classic video game wall. This year, the Festival celebrates the 40th anniversary of Apple computer. Attendees will experience the complete history of Apple at the Computer Museum of America?s Apple Pop-Up Museum, a large, one-of-a-kind display of extremely rare computers. The museum features a dynamic presentation of the small start-up, founded in a garage by two young friends in 1976, that became the world's leading computer company. Guest speakers include renowned industrial designers and engineers who have played integral roles in computer history. Attendees will hear a first-hand account from industrial designer Jerry Manock, who created designs for the Apple II and III in the 70s and 80s. Vintage computer enthusiasts will enjoy a presentation from acclaimed computer engineer Bil Herd, creator of several noteworthy designs, including the Commodore 128. Computer Museum of America?s companion exhibit, ?LINK: Personal Computing >from Switches to Pockets,? features the links from the past to the present with displays of iconic computer brands including original computers like the IBM PC, as well as some very rare and unique machines such as the Kenbak-1. VCFSE is hosted and produced by the Atlanta Historical Computing Society and the Computer Museum of America. VCFSE is the premier vintage computer festival in the southeast and part of the VCF family of vintage computer festivals, which include VCF East in New Jersey, VCF Midwest in Chicago and VCF West in California. The VCF mission is to educate, promote and demonstrate the evolutionary significance of vintage computers, software and gaming to today?s new generation of innovators by offering attendees a chance to experience the technologies, people and remarkable stories that embody the history of the computer revolution. VCFSE 4.0 will be held at Kings Market Shopping Center, 1425 Market Blvd, Suite 200, Roswell, GA 30076, in what was previously a Comp-USA Super Store. The Festival is open from 10 AM to 7 PM on Saturday and from 10 AM to 5 PM on Sunday. Adult admission is $10 per day or $15 for a two-day pass. Children ages 17 and younger are admitted free when accompanied by a parent or guardian. For more details, please visit http://vcfed.org/wp/festivals/vintage-computer-festival-southeast-4-0/ or http://vcfse.org

9 years, 9 months

jrIDE sidecars: Interested in another chance?

by mbbrutman＠brutman.com

Short story: We are thinking of producing another set of 25 and want to know how much interest there is out there. If you are interested in purchasing one please email me. --- What is it? An IDE interface, clock/calendar, and a memory expansion sidecar for the PCjr. The BIOS extension allows booting from recent IDE/PATA hard drives that support LBA addressing mode. (Compact Flash with an adapter or Disk On Modules also work.) The memory expansion brings the machine from 128KB to 736KB. The last time we did this the price was around $75 for the kit of parts; you have to supply your own sidecar shell. See http://www.brutman.com/jrIDE/jrIDE.html for more details. Mike

9 years, 9 months

QSIC update

by jnc＠mercury.lcs.mit.edu

> So here's a quick update on where Dave Bridgham and I are with the > QSIC ... We have the first of two wire-wrap prototype QBUS motherboards > more or less (see below) done .. the hardware is 'mostly' working; most > of the work from here on out will be FPGA, etc, programming. There > _are_ a few additional QBUS lines used for bus master (DMA) and > interrupts which we haven't used yet, and one of the first things done > now is to get those two kind of bus cycles working > ... > With that in hand, we can do the first controller (RK11), using memory > in the FPGA to simulate a small disk. Well, Dave has made a big step down that road; he has DMA working (both the bus arbitration cycle for DMA, as well as master-mode transfers to and from QBUS slave memory). He's now starting in on interrupt cycles; once those work, he effectively has emulation of a minimal small RK (he already has all the registers, since he needs them to control the DMA to and from the RAM disk). At that point I should be able to test it by making it the swap drive on a Unix V6 load. Noel

9 years, 9 months

Big-Board II & Micro Cornucopia User Group Disks

by james.h.simpson＠gmail.com

Thanks very much to all who posted a reply. The BBII disk files was something I didn't have, and the CD image had some very interesting stuff. I did go and download the bitsaver files also. Thanks again!

9 years, 9 months

Documentation on DEC's Omnibus Module M865 (Console Teletype Control)

by admin＠meiner.ch

Hi guys... I am currently looking for documentation (configuration, SCH, ...) on DEC's M865 Teletype-interface. Not the M8650 or M8655, mind you. Could someone point me to the right direction? Thanks a lot, Martin

9 years, 9 months

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