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Anyone Familiar with a TK TK83305-4N-D-03 Motherboard?

VCFed about 10 hours ago

I just purchased a computer with this system and had a question about processor configuration. I was able to obtain some information about it with the documentation here: TK TK83305-4N-D-03​ Appa... it can use a solder on CPU (which mine has, an …

FS/FT: HP Ultra Slim Dock 2013 Docking Station (D9Y32AA#ABA)

Apple Fritter about 2 days ago

I have an HP Ultra Slim Dock 2013 Docking Station (D9Y32AA#ABA) in need of a new home.  It is in cherry condition, and works perfectly.  Has PSU, no box, no docs. Asking $15  USD (obo) plus shipping.  Will ship anywhere, including APOs. Will accept t …
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Technical questions • ULA, bus conflicts and the expansion devices

Defence Force about 3 days ago

I've been tinkering with the expansion port and grown interested in the bus phases of the Oric Atmos and how its supposed to work. The ULA runs the show on the bus of course, and divides the Phi2 into 3 access "slots", two for itself for running the graph …

recovering an SGI indigo

VCFed about 4 days ago

hey all, i have an unhappy indigo in my collection- i recently replaced the CPU battery since the diagnostic LED was yellow and i could get nothing on my display. this fixed the issue with the yellow LED and the CPU seems happy from the outside, but now i …

Haswell I5 CPU/Motherboard/Ram combo, Skylake Mini-PC, NEC RPS-350-8A

VCFed about 4 days ago

Have these 3 things available. Open to offers. Dell Inspiron 3847 Motherboard/CPU/RamI5-4460. 6gb DDR3. Wifi. Motherboard is Micro-ATX. Fully ATX compliant, no proprietary anything. Fully working. Includes IO Shield.$50 shipped.HP ProDesk 400 G3 Mini- …

FS Ultra 45

VCFed about 6 days ago

Slightly odd one - so I have an Sun Ultra 45 for sale which is complete except for a CPU and heatsink. This was removed to repair another system. The system works fine with a CPU fitted, NVRAM is good, memory and disk are good. The case is OK, there is a …
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Need help identifying some PDP-11 boards

VCFed about 6 days 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 …
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Technical questions • Trying to fix an Oric 1

Defence Force about 7 days ago

Hey Folks,Back with some more support questions.After I fixed my Oric Atmos, someone here in Oz approached me and asked if I could look at their Oric 1."Sure!" I foolishly said.Symptoms were a black screen. I initially checked voltages (All fine) and then …

Commodore PET 2001-N garbled and truncated screen.

VCFed about 7 days ago

Hello, A few months ago we bought a Commodore PET 2001-N in a known-to-be-not-working condition. It had, apparently, spent the last 30 years of it's life hiding in a loft and copious dust and rust bears that out. I have fixed several problems so far (see …

Universal Instruments Corp 8222 Controller: Industrial PDP-11 clone

VCFed about 8 days 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 …

Mystery Memory Board

VCFed about 9 days ago

See attached photo for my mystery memory board. Does anyone recognize the board? I purchased this board as part of a five card lot on eBay. I bought the lot just to get a fairly rare Vector Graphic 8080 CPU board. - The top section is all MM2102 1024x1 …

Calling all Coppermine-128 Celeron 600 owners...

VCFed about 13 days ago

Hello guys, I'm going to start using a Celeron 600MHz (66MHz FSB) CPU in a Toshiba laptop that takes desktop Socket 370 CPUs. The system will have 256MB of ram and a 32GB SD card inside an IDE adapter for the Windows 98se OS. I am downgrading the 1GHz PI …

Macintosh Classic with horizontal lines on screen

Apple Fritter about 13 days ago

AttachmentSize IMG_5538.jpeg1.1 MB IMG_5256.jpeg2.52 MB IMG_5539.jpeg2.14 MB IMG_5193.jpeg3.02 MB I have a classic Macintosh board that was really damaged by the acid. I'll start by saying that I washed it carefully, replaced all the capa …
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Review and evaluation of some vintage educational computer systems

VCFed about 14 days ago

I have made a few videos about the educational machines / "CPU trainers" in my collection - apologies for poor English in advance https://www.yout... …

Complete Clean WANG LVP2200 System

VCFed about 14 days ago

Moving Sale -- I'll be listing a few other mini's and peripherals over the next few weeks/months. Here's a complete clean Wang LVP2200 system, including the following: LVP2200 CPU (all cards present), SA1000-series hard drive, 8" Floppy Drive. 2260C …
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Seattle Computer Products 8086 Monitor Collection

VCFed about 14 days ago

I have created a collection of all known versions of SCP's 8086 Monitor ROM. Versions 1.4 to 1.6 are intended for the SCP CPU support board model 300F, while version 1.9 is designed for model 301A. Both the source code and binary files are included for all …

"simple" question for PDP 11/45 and 11/70 experts - location of memory boards

VCFed about 15 days ago

Is it possible to put a memory board into the CPU cabinet or has all memory to be in a separate cabinet? thanks Michael …

Identify this 286 board?

VCFed about 15 days ago

The attached board is on its way from eBay. I just can't resist mystery items, even ones with blown capacitors. I'll take a stab at making it live again. My assumption is that it's some kind of 286 board, and the chip under the heatsink is an 80286. The p …

486 DX/2 66 - Switching speeds down to 33

VCFed about 16 days ago

Curious and need help! What are my options for knocking a DX2 @ 66 down to 33 when needed? Are the CPU jumpers and a switch used for that typically or is there a program that can be run only when needed? Thanks! E …

Robotron KC87 not booting.

VCFed about 20 days ago

Dear Group, I have a Robotron KC87 not booting. When I turn it on, the two leds immediately turn on and I have read that this is not good. ? My KC85/1 does not behave in this way. I have an RGB cable and (obviously) I get no image. I have read that it coul …
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Imsai VDP-40

VCFed about 20 days ago

Hi, a friend of mine got his hands on a nice Imsai VDP-40. We are trying to bring it back to life, but have some problems getting a working prompt. We have certainly 2 different problems as we have different results when the machine is powered on: - some …
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Using SRAM for an Apple II

Apple Fritter about 20 days ago

AttachmentSize short phi2.jpg59.58 KB  I just read UncleBernie's response here:  https://www.applefritter.co... I figured the timing was right to discuss the issue of SRAM write timing on an Apple II. What I …

Compaq Ipaq 1801-Microcode Update Error

VCFed about 28 days ago

Howdy folks! I have a first model Compaq Ipaq desktop that I'm working on. I recently upgraded the CPU to a PIII 1Ghz, but now I'm getting, "1801-Microcode Update Error". It's fine with a 733 Mhz, but not the 1G. I need to update the BIOS, bu …

SimH throttle speeds versus actual PDP-11 systems?

VCFed about 29 days 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 …
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PC 486SX (ao486) • Small Linux distros (one is 1.44MB)

MISTerFPGA about 29 days ago

I have been looking into some very small Linux distros and wanted to try them on the MiSTer and its AO486 core.One is Kolibri OS, which can run from a 1.44MB floppy and somehow still have a web browser, file manager, Minesweeper, Snake, Flappy bird, a tex …