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Re: What does it take to replace an Intel 10 MHz 286 with a Harris 12 MHz 286? Hopefully... nothing?

Posted on 2024-04-15, 23:35

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

You'd have to replace some crystal too. No, OP clearly says he wants to run the CPU at 10MHz. Which makes me curious to learn why, is it to replace a confirmed dead CPU and the 12MHz one just happened to be available/cheaper? I could not find Intel 286 at 10 MHz for a reasonable price, whereas the …

Re: What does it take to replace an Intel 10 MHz 286 with a Harris 12 MHz 286? Hopefully... nothing?

Posted on 2024-04-15, 23:32

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

You'd have to replace some crystal too. Also, this system was designed with 10MHz in mind, so all components are rated 10MHz. Overclocking to 12MHz (20%) Will put more stress on the other components as well. This may ruin them hotter than intended and probably cause instability. The 8530-286 was …

Re: What does it take to replace an Intel 10 MHz 286 with a Harris 12 MHz 286? Hopefully... nothing?

Posted on 2024-04-13, 05:32

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

douglar wrote on 2024-04-12, 18:05: I imagine it should be straight forward as long as the model 30 motherboard takes a 286 with 68-pin PLCC packaging. Thank you.

Re: What does it take to replace an Intel 10 MHz 286 with a Harris 12 MHz 286? Hopefully... nothing?

Posted on 2024-04-13, 05:31

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

It should just be a matter of replacing the chip, and if the original CPU isn't an LCC version it should be quite easy. Thank you. The CPU is housed in a PLCC package, so it isn't the LCC version 286. So I should be good to go. Is there any PLCC Harris variant of the 286 that would not be suitable? …

What does it take to replace an Intel 10 MHz 286 with a Harris 12 MHz 286? Hopefully... nothing?

Posted on 2024-04-12, 17:00

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

My aim is to run the Harris CPU at 10 MHz, but am unsure if there is some detail to keep my eyes on, e.g. supply voltage(s) or other things. This is for an IBM PS/2 model 30-286.

Re: getting my 8086 IBM PS/2 8530 up and running

Posted on 2024-03-14, 17:16

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

So i managed to build an XT-IDE CF board to get it booting at least. Works great. I am completely stuck at this step. I have the xt-ide where you can insert a CF card, but so far I could not boot from any of my CF cards. Either it just stays there saying "booting from C", or OS not found, or can't …

Re: Adding a molex-connected device to an IBM PS/2 model 30 (8086)

Posted on 2024-03-13, 18:13

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I'm thinking of vampire-ing the gnd and +5V off the ISA slot itself. I hate it because it's dumb/stupid/unelegant, but I can't think of a nicer solution. I was hoping someone familiar with this motherboard would maybe show The Way.

Re: Adding a molex-connected device to an IBM PS/2 model 30 (8086)

Posted on 2024-03-09, 13:32

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Easiest would probably be to tap into the motherboard power cable - or is it a proprietary flat cable from the few photos of the assembled PC I can find? Most reversible would indeed be buying the appropriate plug for the motherboard XTA connector and making your power-only HDD cable… Most …

Adding a molex-connected device to an IBM PS/2 model 30 (8086)

Posted on 2024-03-09, 09:03

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The hard disk in my PS/2 model 30 has died. These drives use an edge connector to transfer data AND power. What would be the easiest way to power an IDE drive (XT-IDE setup)? It's a physical IDE drive, not a CF card, so I do need that power. I am looking for a simple way to do this, e.g. find some …

Re: Need a NE2000 setup/config program

Posted on 2024-03-09, 08:20

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi (I registered for this !) I had the configuration problem and found a floppy image that contains tools for many network cards (various ne2000 and more) The image was found here: http://www.cuug.ab.ca/~babulicm/bsdwall/nic.html (bottom of page, link "NIC Config Floppy") It's a raw floppy image, …

Re: Tandy 3 Voice Sound - SN76489 ISA Soundcard Project

Posted on 2022-11-20, 21:21

in Marvin \ Sound

in Marvin \ Sound

Where can this card be bought already built, or at least the PCB?

Re: Sound Blaster Audigy 2 PCI Sound Card SB0240

Posted on 2021-02-28, 09:10

in Marvin \ Sound

in Marvin \ Sound

I have the same issues.

Re: IBM MWave related

Posted on 2020-11-23, 18:02

in Marvin \ Sound

in Marvin \ Sound

oeuvre wrote on 2019-05-05, 02:31: try looking here http://ps-2.kev009.com/ I don't see any IBM Mwave drivers, there.

Re: Need a NE2000 setup/config program

Posted on 2020-08-09, 07:34

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I find it sad that not even the Vogons driver library has NE2000 drivers., apart the DOS packet driver.

Re: Need a NE2000 setup/config program

Posted on 2020-08-09, 07:33

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

2000-d1.zip can be found at https://www.driverguide.com/driver/detail.php?driverid=73207 2000-ut.zip is harder to find. I would be interested in adding it to my library. Sadly, nothing can be downloaded from there at the moment. And the fantastic Internet Archive does not have those two files …

Re: Retro OSes for retro computers

Posted on 2019-12-31, 21:40

in Marvin \ Software

in Marvin \ Software

ArtiomWin wrote on 2019-06-11, 09:16: Just installed SCO Open Desktop to emulator. This system runs smoothly on Pentium 66 and 8 megs RAM. But installation is a very long process (more than 40 floppies!). Here's how it look likes:20190611_113929.png Where could one get SCO Open Desktop?

Re: Retro OSes for retro computers

Posted on 2019-12-31, 21:28

in Marvin \ Software

in Marvin \ Software

The older versions of BeOS are essentially abandonware and are fair game. I'm sure Gasee, the Fearless Leader, wouldn't mind 😀 The only issue with BeOS is that it required at least a pentium to run. But it ran very well on a P-100MHz. There was also a PowerPC version.

Re: FX-3000 motherboard thread

Posted on 2019-12-20, 15:21

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

It's hard to miss the first photo in the thread. But I am not sure abut the polarity of the leads on that photo. It is low-res enough that I am not 100% sure which lead is connected where, and I am definitely not sure what the colours necessarily mean for the poster. I use red for positive an black …

Re: FX-3000 motherboard thread

Posted on 2019-12-16, 00:04

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Another question: could someone please tell me the exact polarity of the battery at the motherboard?

Re: FX-3000 motherboard thread

Posted on 2019-12-10, 21:14

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I have the same board, except the socket for the 387 looks like a socket for a 387 (only two rows of pins, instead of four). I have some cache chips missing, but before I insert some additional ones, I wonder if there is a DOS application that can test the external cache? I've never seen something …

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