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

VCFed about 3 months 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 3 months 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 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 …
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Technical questions • Trying to fix an Oric 1

Defence Force about 3 months 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 3 months 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 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 …

Mystery Memory Board

VCFed about 3 months 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 3 months 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 3 months 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 3 months 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 3 months 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 3 months 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 3 months 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 3 months 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 3 months 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 3 months 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 3 months 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 3 months 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 4 months 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 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 …
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PC 486SX (ao486) • Small Linux distros (one is 1.44MB)

MISTerFPGA about 4 months 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 …

Packard Bell 60Mhz with overdrive?

VCFed about 4 months ago

Hi! I recently got a packard bell legend multimedia (A940-4X4 ES20R) that comes with this motherboard (520r M/Board) with a Pentium 60Mhz (Socket 4). As you can see in the attached picture, aparently it has an Ovedrive unit, and I can see a 133 marking on …

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 …

overclock CPU powermac MDD FW800, dead L3

Mac OS9 Lives about 4 months ago

I have overclocked all my MDD FW400 macs with dual ring CPUs from 1.25 to 1.5ghz L3 2mb with no issues. I increased the voltage to 1.60v,stable for years. very happy with these.Different story for MDD FW800 with three-ring CPU. even just changing fro... …
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Use of a RQDX3 Controller on a Microvax 3500

VCFed about 4 months ago

Dear all, I am trying to use a KA650 CPU in a MV3500 together with a RQDX3 Controller. Unfortunately, I do not own the BA23 Front Panel with the LEDs and Switches, only the distribution panel. When I try to boot from a harddrive perpared on a MV200 …