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GOTEK, PDP-11, and MicroVAX2

VCFed about 2 months ago

Hello All, I have a couple of systems that I am working with... one is a PDP-11/53 and the other is a MicroVAX2 (KA630 CPU), both in BA23 chassis. I have been experimenting with the GOTEK floppy emulator running the latest version of FlashFloppy, and I h …

Micro PDP-11/23+ Gotek Flashfloppy Success

VCFed about 3 months ago

Finally got my Gotek with Flashfloppy to boot the PDP. The computer is a Micro-PDP11/23+ in a BA-23 case with M8189, M8067, and M8639-YA (an RQDX1). There is no hard drive but there is an RX-50 dual floppy. I've booted RT-11 in the past from a floppy an …

WTB: DEC M8027 line printer controller cable to Centronics...

VCFed about 3 months ago

I have a PDP-11/83 that I'd like to attach a printer to, The Qbus M8027 line printer card that i have is missing the cable going to the printer. Let me know if you have one for sale. …
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Need help identifying some PDP-11 boards

VCFed about 3 months ago

I picked these up at the freebie table at our club's last GTG, but nobody knows what they're for, other than the CPU being that of a PDP-11: ... more …

Universal Instruments Corp 8222 Controller: Industrial PDP-11 clone

VCFed about 3 months ago

Since there wasn't much online for this piece of equipment (until klapperp shared a bunch of info), I figure it might be a good idea to start a separate thread to capture any information on this PDP-11 variant so others who are interested in this line of m …

PDP-11 style front card

VCFed about 3 months ago

I spoke a while back about two PDP-11 systems in a room next to my current work area. So far, I haven't heard anything about any long-term plans for these (we have plenty of space now and these two machines are well out of the way of the main production ar …

ICOM FDOS-III for the Poly88

VCFed about 4 months ago

As posted in the DEC forum, I am archiving a pack of 8" floppy disks I came over. While most of those disks are for the PDP-11, one of the disks seems to be a release of FDOS-III for the Poly88. Does anyone here have experience with this? I don't kno …

SimH throttle speeds versus actual PDP-11 systems?

VCFed about 4 months ago

Has somebody put together notes or a table on matching throttle speeds to approximate CPU speeds of DEC systems for SimH? I know it's not exact, but am curious as to just how accurate we can get? -Thom …

Looking for a PDP-11

VCFed about 4 months ago

I figure my chances are slim, but. I am looking for a PDP-11, an 11/34a or its smaller brother, the 11/04; e.g. the ones with the hex keypad. I'll settle for just a CPU, but more would be welcome. I used to have several PDP-11s. The best one was an 11/8x …

RT-11 floppy disks conversion

VCFed about 4 months ago

Hi I am waiting for some 8" floppies with some RT-11 software on them. There's Fortran and BASIC, and the expected pile of games. Several of the floppies also seems to have a system installed, so I guess these are bootable. Now, I don't own and I ha …

PDP-11 Diode ROM

VCFed about 4 months ago

Guys, Starting 2024 fun! Something new&nerdy here: ... ROM Book Joomla! - dynamische Portal-Engine und Content-Management-System ... …

The PDP-11/23 Plus Works!

Usagi Electric about 4 months ago

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This PDP-11 Power Supply Defeated Me

Usagi Electric about 4 months ago

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PDP-11 RL01/RL02 bare metal ekermit server

VCFed about 4 months ago

https://github.com/codesleu... RL01/RL02 bare metal ekermit server. This project was created as a way to backup PDP-11 RL01/RL02 disks using minimal hardware without an operating system. If you have a bootable PDP-11 with other stor …

TK50 emulator

VCFed about 4 months ago

Hello All, I've been working with a couple of TK50 tape drives, and I have them working with my PDP-11/53. I can read, write, and delete files, and I can make backups of the hard drives. The things that are hard to come by are actual tape cartridges wit …

Was there a VAX SBC?

VCFed about 4 months ago

Hi, sorry if that question looks strange. There was a PDP-11 trainer, one SBC (Falcon), and several modern SBC projects around J11 and F11, I was wondering if the same thing happened for the VAX architecture? Thanks! Jean... …
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WTB: “mini” computer - 70s/80s

VCFed about 4 months ago

Hi All, This might be a long shot but if anyone has for sale, or could point me in the direction of where to look for one, I'm after a vintage "mini" computer, thinking DEC PDP-11, Data General Nova, that kind of thing. I'm based in North East En …
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Other Computer / System Cores • Soyz-Neon PC-11/16 (UNEON) Core

MISTerFPGA about 5 months ago

Soyz-Neon PC-11/16 (UNEON).Soviet Personal computer with an advanced graphics subsystem, multitasking and compatibility with the PDP-11 architecture.Core for MiSTer and MiST.github.com/xolod79/UNE... the IDE-HDD to work, you need to replace Main_MiSTer …

yet another PDP-11 barebone hack

VCFed about 5 months ago

Hello, inspired by other members I'm opening this new thread hoping one day to have my own self-made PDP-11. There are many reasons that brought me to creating a PDP11 but I would be honest in saying it's for fun, for the sake of it, for giving a tribute t …

PDP-11 Qbus Cards and Peripherals

VCFed about 5 months ago

I have the following PDP-11 Qbus cards and bus items I will be selling: M7504 DEQNA ethernet card, (2) KDJ11-A CPU cards, M8067 128k RAM, M8017 serial line interface card, BA214 Qbus back plan, H9278-A Qbus back plane, 5014144C 128k PAR/CSR. Prices on requ …

DEC Donation to the RICM

VCFed about 5 months ago

Thomas, an ex-DEC employee just donated a collection of 1970's DEC equipment to the Rhode Island Computer Museum. The donation includes a PDP-11/05, PDP-11/20, PDP-11/34a, PDP-11/44, some empty PDP-11 chassis, 3x RL02 disk drives with lots of disk packs, 2 …

Problems booting PDP-11 through tu58 emulator

VCFed about 5 months ago

Hi everyone. I've wanted to play around with a PDP-11 so I bought various cards and pieces to assemble one. Right now I have a basic system up and booting into microODT. The next step would be to try and boot RT-11 with a tu58 emulator but I've been having …

Which computer companies fabbed their own Silicon?

VCFed about 5 months ago

"Real computer companies have fabs"--to paraphrase Jerry Sanders, founder of AMD DEC fabbed Alpha CPUs in their fab in Hudson Massachusetts, and I believe also VAX chips? They also designed chipsets, which I assume they also fabbed. Not sure a …
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PDP-11 Bank

VCFed about 6 months ago

I got an early Christmas present from a friend. The front panel doesn't match any PDP-11 that I could find. The tape drive looks like a TS03, but the tape is on the take-up backwards. It is still very cool. …

Which PDP-11 parts to keep an eye out for?

VCFed about 6 months ago

So, at my work, in a room adjacent to my work area, are these two PDP-11s and which are used to run some automated electronics assembly equipment. Back in the 1990s, this equipment ran 8 hours a day, but now, it is barely run 8 hours a quarter. I think the …