Recent content by bigral

Hello, I'm looking for newer boot ROM with MSCP ( "DU:" ) boot support for DEC M8189 KDF11-B PDP11/23+ CPU. I see there are two 4kb UV EPROM chips. Is there way to use bigger chips (i2764, i27128, i27256 etc)?

Hello, many of you ask about the ways of booting rt-11 system, managing dos-11/rt-11 images. So, I decided to create topic about nice tools that were developed by outstanding fan of pdp11 Patron from Russia. 1) VT52 terminal emulator with HX virtual drive support...

Hello, I have some very old chips most of them are clones of well known chips produced ~30+ years ago. Here are pictures with small description: https://www.flickr.com/photos/78012261@N04/sets/72157653239151896 My main interest is pdp11 related materials/hardware/chips. Please contact through...

Hello, I am trying to format st225 and st251 connected to RQDX3 through M9058 but I'm getting error: controller has reported a fatal error in the format program status: rct write error what I should check to get an idea about the cause of this error? thanks, Andrey p.s. also I have couple...

Hello, I have CMD CQD200/TM QBUS to SCSI board in my pdp11/23+. I have attached two QIC tapes and MO Fuji drive. I have made some testing using built-in firmware testing routines. These devices are working for read and write operations. BUT! They don't work as boot devices. Also INI DU1: and...

Hello, I found outstanding article about upgrade CMD CQD 200/T or /M controller into CQD 200/TM here: https://sites.google.com/site/glensvintagecomputerinfo/cmd-cqd-200-tm/csr-decode-pal but I can not download ispLEVER from official site (seems their download are is not working for my IP). Can...

Hello ALL, I wonder if there is file storage with ALL or most "layered products" from DEC? I think they all together should take no more than 1gb space. update: this thread about pdp11 related software.

Hello, I'm looking for the manual of the Plessey 705965-100. This card has 3 box header/IDC connectors. The second and third are SLU DLV11-J style connectors. The first looks very same too BUT it's wiring completely different and unknown. There are many configuration switches on board. Does...

There is an SMS mfm controller presumably used in GENRAD test equipment. Here is it: http://www.ebay.com/itm/DEC-PDP-SMS-CONTROLLER-FOR-PDP11-/201009419742?pt=US_Vintage_Computers_Mainframes&hash=item2ecd1855de questions: 1. what backplane required for it q22/q22 or q22/cd type? (is there some...

Hello, is there way to attach IOMEGA ZIP drive with centronics interface (aka pc lpt, parallel port) to pdp-11? Is there any drivers? Boot ROMS?

Hello, I know that DEC pro was an attempt to provide affordable pdp-11 with decent graphics into small office/school/university market. The graphics was added, but I never heard critical review of those. What was done in terms of software? Why this API/architecture was not used in later...

Hello, I think I can help acquire some parts (CPUs and support chips), documentation, cards or even full systems. Please mail me private message if you want spend your time on those. I think following chips are available: CPUs: K1801VM1 (11/03 emulator + timer + multi-cpu support),K1801VM2 -...

Hello ALL, I want to build pdp-11/83, but I'm not really experienced with DEC Q-BUS modules/options. As I learned surfing the web I need an Q22/CD (PMI) capable backplane with 8 quad slots (3*Q22/CD and 5*Q22/Q22). All backplanes with 9 quad slots or dual slots are Q22/Q22 (or Q22 or not yet...

Hello All, there are many obscure and mysterious q-bus modules around, I hope someone here can explain what is this: http://www.ebay.com/itm/DEC-PDP-IMAGING-TECHNOLOGY-FG-101-Q-Quad-module-MM-100-/221282978511?pt=US_Vintage_Computing_Parts_Accessories&hash=item33857e4acf

Hello All, I want to build q-bus based pdp-11 system for education and hobby. But, I've got a number of stumbling points with this, including parts availability and level of competence. Any help is appreciated. Thanks.