Included tags: CPU ×
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Help identifying strange 286 motherboard

VCFed about 4 months ago

Hi, I'm hoping someone can tell me more about this weird motherboard that I'm guessing was some kind of prototype. It has a 286 CPU but wants an XT keyboard. POST says "Copr. 1984,1985 SAMSUNG Personal Computer", and the ROM stickers are hand …

Wanted: SWTPC 6800 Processor card(MP-A CPU Board) and case cover.

VCFed about 4 months ago

Hello all Can anyone help me find a MP-A CPU Board? I bought a system and it is completely missing. I am in the UK but happy to pay shipping. Infact I am in Scotts Valley California in 2 weeks so I could have it sent their. Thanks …

630QB repair

VCFed about 4 months ago

I bought a clone of 630QB board. It was broken (did not start, 0xF on LEDs). I replaced two logic ICes and removed the FPU. The CPU began to start, but still 0xF on LEDs. I replaced one more logic IC. Now the board starts and outputs from 0x7 to 0x4 on LE …

Pet 8032090 universal board no chirp

VCFed about 4 months ago

Finally have some time to work on a dead PET motherboard (no chirp on boot, no image on screen) that was laying around for about 20 years now. It was missing the CPU, so just bought a 6502 from Aliexpress (it may be a fake but at least pins seems to match …

What is a more "interesting" choice for an AGP card?

VCFed about 4 months ago

I have a Dell Dimension XPX T450 in my collection, and I've just discovered it can run a much faster CPU than I thought(supposedly up to 1ghz). I have a spare 933mhz slot1 I intend to park in it, and it already has the max 768mb of RAM. This machine is als …

Disk boot failure

VCFed about 4 months ago

Greetings, CPU Type: Am486 DX4. System will not boot up. In the past, system worked perfectly. Then last year I started getting a Hard disk fail error display, Press F1 to continue. The startup sequence would then finish, all is well. As of a couple of mon …

Five Festive 5150 Boards (BOARD #1 Thread)

VCFed about 4 months ago

Welcome to Board #1! [Link to Original Thread / Board #3] Here's what I know so far: - Motherboard type 64KB-256KB - Known good CPU inserted - Known good RAM populated in Bank0, other banks unpopulated - RDR Doesn't boot up, no beep, LPT says "00&qu …

Windows 7 Ryzen CPU Build (Text Form)

VCFed about 4 months ago

Windows 7 with the Ryzen CPU This procedure covers Ryzen CPUs only on motherboards with the AMD X370 and AMD X470 chipsets. This project is an update utilizing basically old and used p …

Windows 7 Ryzen Build (Part 1)

VCFed about 4 months ago

Windows 7 with the Ryzen CPU This procedure covers Ryzen CPUs only on motherboards with the AMD X370 and AMD X470 chipsets. This project is an update utilizing basically old and used parts, some of …
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8087 coprocessor for Amstrad PPC?

VCFed about 4 months ago

Hi there, Although I haven't opened my PPC 640 yet, I saw on oldcrap.org that there is a slot underneath the CPU which appears to be for a math coprocessor: As the V30 CPU runs at 8MHz, I was thinking of fitting an 8MHz D8087-2 into the empty slot. …

Seattle Computer Products 8086 S-100 System (Complete)

VCFed about 4 months ago

Complete Seattle Computer Products 8086 S-100 system (see link for pics): S-100 Cards (Manufacturer: all cards made by Seattle Computer Products, verified original by Tim Patterson) - SCP-210 CPU Board (Intel 8086 based) - SCP-301 CPU Support Board - SCP- …

Five Festive 5150 Boards (BOARD #5 Thread)

VCFed about 4 months ago

Welcome to Board #5! Here's what I know so far: - Motherboard type 16KB-64KB - Known good CPU inserted - Known good RAM populated in Bank0, other banks unpopulated - RDR RAM Tests Pass (see screenshot below) - Booting with known good "5700671" B …

NorthStar Horizon Z80 ROM monitor/diagnostic tool

VCFed about 4 months ago

https://github.com/codesleu... NorthStar Horizon is a S-100 bus Z80 computer from 1977. This ROM monitor was created as part of a restoration project. The initial need was a diagnostic to isolate and troubleshoot basic hardwa …

Understanding the Apple 1's Function

Apple Fritter about 4 months ago

Hi All:I have a goal for 2024. :-)I am not an electrical engineer by trade or education, only by interest, which means I am not an EE.One of the goals I set for 2024 is to take my electronics understanding up a notch.  I am good at soldering and building …

Mac Pro 1,1 worth it?

VCFed about 4 months ago

Six years ago I built up a fairly decent Mac Pro 1,1 and then gave it faster drives, a newer video card, 16gb ram and did the SLAED Xeon CPU upgrade to make it a dual quad. Also ran El Capitan on it because at that time it was the last version of OS X to s …

Should this processor work in this motherboard?

VCFed about 4 months ago

I have an Intel Intel AL440LX in which I am trying to make run an Intel Pentium II SL2S7. The manual says the board only supports up to 66mhz FSB, but normally it down-clocks the CPU in that case. There are many reasons why this system might not be postin …

(ebay) Retro DOS game PC Pentium 200Mhz MMX, 32Mb RAM, Nvidia Vanta, AWE32, DVD, Win 98

VCFed about 4 months ago

Vintage gaming computer with Pentium MMX 200Mhz! Real "Time mashine" from 1998 year! Brand: DTK On board: - CPU: Intel Pentium MMX - 200Mhz, SL27J, - MOTHERBOARD: Lucky Star 5I-VX1F, Socket 7, - RAM: 32 Mb (1x32Mb DIMM PC100), - HDD: IDE FUJ …

Adding 9.2.2 to a G4 using OS X 10.4 (Tiger)

Mac OS9 Lives about 4 months ago

HiI just bought a G4 700 MHZ  Powermac 4,2.   "CPU type":PowerPC G4 (2.1) It came with Tiger and I'd like to erase the computer and format it in 9.2.2Can someone please walk me through that?Thanks! …

looking for input, swap A series to B series 7455 on single/dual daughter baords

Mac OS9 Lives about 4 months ago

im considering buying some of these: https://www.ebay.com/itm/39... my understanding hat the B series can OC much better than teh A that came in most of our systems. IF this is the case, settings clocks on this 1.25 for 1.42 on our dual cpu... …

How can it be this fast, assuming it is

VCFed about 4 months ago

I've finally got the throttling code implemented in the 4004 emulation code. I can run it throttled or unthrottled, and below is unthrottled to see how fast it _can_ run. This is on a Windows 10 box, win32 console application. My task manager says the C …
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CBM PET 3032 PETTEST issues

VCFed about 4 months ago

Hi all, I'm a newbie here trying to find some help with the repair of my CBM PET 3032. This has been an ongoing project for a couple of years now with long periods of unaction due to time constraints. Over the holidays, I found time to look into it again. …

A Quad-CPU PowerPC BEHEMOTH

Action Retro about 4 months ago

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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 …

8-bit acorn hardware • Interesting problems with commands from a rom image in SWRAM on an Electron

Stardot about 5 months ago

I have written my Desktop software in assembler to make a 'proper' rom image.The Keyboard version is attached in a SSD. Control by cursor keys+SHIFT on BBC or Electron if you can get that far!Problems1. Early during development, as soon as I tested on an …
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Apple Computer A “Newton-Byte” Error Page 13

Apple Fritter about 5 months ago

I have almost completed my Apple Computer A including the D IMG_6600.jpeg atanetics keyboard and case. This is my 3rd build with the last two using Uncle Bernies Kits and Mike Newton boards. Both are working great! The Apple …