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Hi! I'm searching for a cheap CAMAC crate and/or different plugin modules, as I collect scientific instruments. I figured these might turn up here :) Pretty much anything has interest, ADC's, logic modules, crate controllers, so on. The related NIM rack equipment is also of interest. Anyone...

Hey! I'm collecting NIM modules (I know, not strictly speaking a computer item but made by same companies, and often paired with PDP-11's and the like). Instrumentation modules for physics research like counters, analyzers, amplifiers, ADC's etc. by companies like Nuclear Data, Ortec...

Not sure where to put this.. I have a custom GPIB card, whose accompanying software will ONLY run on win3.1 (software runs on win95 but it's dependent on Norton Backup which crashes). Do there exist any emulator that can emulate win3.1 and interface with the real-world card? Has anyone tried...

Hi! I really need a floppy drive on an old beaten up compaq armada 7770DMT. I have the original flat flex cable (sais FPC on it) that fits a 26 pin internal drive. Does anyone know the pinout of this, so I can solder up a quick adapter to a std. drive? thanks!

Hi all, I'm trying to install some early 90's HP software for IBM PC's, via dosbox. The HP computer museum has the .TD0 files published, but I don't really know what to do with them. I tried to convert them into .img, mount and install. I can see the file system, but I get some strange...

Wow, that took a headache or two! I've partially reverse engineered the CPU card to gain insight in how it works with the memory bank switching, and here's what I came up with.. It It looks to me like a certain address A2-A7 triggers the bus /WRITE EN signal, that i think here is used to switch...

Hi! so, i'm currently messing around with a small "ECB" z-80 computer i bought. I think it's a swedish traffic data controller from the 80's, from the ascii strings i can see in ROM. The CPU card is a true SBC, with 4K rom, some SRAM, Z80 CPU, Z80 SIO/2, and Z80 CTC (that also sets baudrate)...

So today i scored this neat little europe card bus system, with backplane and psu and all! it has 4 cards: CPU/boot rom/SIO (2x RS232; terminal and "datex"??) ROM/RAM card with 16K EPROM and 48K SRAM (nice!) - "METRIC CARD EROM/RAM" and two identical dual serial cards, one labled printer 1+2...

Hi all! I recently got a GRC 'TBC' qbus card (thanks, Mal!), and have spent a couple of days getting it running. Mal has provided a small section about it on his website, along with one set of ROM dumps and the manual. The manual is a bit..vague.. about some points, but the point of this card...

Hi all, So, I've gathered a lot of info on how to squeeze actual fun out of a PDP-11 with only paper tape as storage (in no small part thanks to advice from a lot of you guys!), I figured it's time I compile it into a post, that could potentially help others doing the same. My issue was: Had...

Hi! I'm still struggling a bit with getting a bootstrap card for my 11/23, and the usual prices they go for on Ebay are above what I can/want to spend on it. Basically, any eprom card that can be assigned to the right addresses can be used. Then I found this...

I just got home from the electronics store with a giant box of old pcbs, and among the more interesting was this 80186 board: It's a controller board from a computerized vacuum gauge/controller unit, MKS146, apparently. I originally thought it was an ISA motherboard, with custom connectors...

Hi! There may be a perfectly logical explaination for this, but I've messed around with writing directly from ODT to hardware registers (serial buffer, parallel line interface, etc.) and noticed the following: In programming, for example, the console serial port is (usually) at base address...

Hey! I'm looking for an RX-50 drive for a RQDX2 board in a pdp-11/23. Anyone has one lying around in reasonable condition, for a reasonable price, within a reasonable distance from Denmark? thanks for looking! --Chris

Hey! so, I'm in the middle of a mystery wrapped in a conundrum. I'm throwing together a scrap 486 pc, and it only has floppy drives. I need to get software onto it that I find online etc. but I don't have any other computers with floppy drives. I don't want to invest any money into this project...

Hi, not sure this is more of a PDP11 question or a programming question, but I'm gonna put it here. I'm currently trying to teach myself assembly for the PDP11, with all the original manuals, either online or in hand, I'd like to start building up a library of snippets to work with, functions...

Hi! Looking for a general purpose IO card for my QBUS pdp-11. preferably a DRV-11, or ADAC 1632TTL, or something similar, that's not so obscure that info's lost about it. Does anyone have some such card, for a reasonable price? and in the EU? thanks for looking! --Christoffer

Hi! In my quest to get at developing software on the pdp-11, without emulation, I'm looking for a compiler, preferably loadable from paper tape, for either C or some other high level language. I know there's likely one that will run under RT-11 or definately a pdp-11 UNIX one, but without...

Hi, and sorry for posting two threads in such a short time, the first one was just me not reading. I've finally got hold of a GNT tape puncher/reader combo, and of course, it'd be nice to use it with my PDP-11/23. I just can't figure out how to set it up with the absolute loader and all...

Hi, quick question, the image file format PDP-11 paper tapes are usually found as is .ptap. Does these need to be converted to .bin to be punched directly to actual paper tape? If so, then how? Thanks in advance!