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Re: Olivetti PCS33 (386 SX)/M-300 - Repairing

Posted on 2021-07-20, 14:11

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I would disconnect the -5V and put a button there, good chances are that even with some protection resistor (which might not be there) the -5V is stressing some logic input quite a lot. If it's some easy to replace TTL chip it's no big deal short term but I would hate to fry the chipset inputs... …

Re: Olivetti PCS33 (386 SX)/M-300 - Repairing

Posted on 2021-07-20, 10:08

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Yes I was checking the connections from the photos and it would seem that you connected what for me is the reset to the white cable or am I wrong ?. You are correct, I connected the -5V to pin 22 as per the pinout in the pic. I didn't connect Pin 21 at all and the PC doesn't seem to care. …

Re: Olivetti PCS33 (386 SX)/M-300 - Repairing

Posted on 2021-07-19, 22:47

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Don't want to hijack the thread, but would just like to say thanks for the power connector pinouts provided here. Just helped me immensely to resurrect my PCS-11, it's original PSU failed today - couldn't get it to start back up again like I did at the weekend. Soon I'm going to replace the PSU with …

Re: Olivetti PCS33 (386 SX)/M-300 - Repairing

Posted on 2021-07-19, 16:46

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

My PCS-11 has started, the ATX power supply connection circuit (or pico PSU in may case ) is correct except for the brown wire which is the reset that comes from the original power supply, inserting the test board in fact without that wire connected the resetis off , insert a resistance in series ( …

Re: What retro activity did you get up to today?

Posted on 2021-07-17, 19:14

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Today I finished off tinkering with my 286 and put it all back together, I'll come back to that another time. Then I decided to turn my attentions towards my Olivetti PCS11 (386SX-16) instead. This should happily do what I originally intended the 286 to do - play EGA-era games (with a VGA card of …

Re: 286 with 1MB RAM - any way to get 640K Conventional?

Posted on 2021-07-15, 20:32

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thanks all for the suggestions. I'll have to look into the RAM expansion card idea. A quick search of eBay shows they're not very common here in the UK though and costly to import. I bought a RAM expansion card a couple of years back (can't remember if it's 1MB or 2MB), but never could get it to …

286 with 1MB RAM - any way to get 640K Conventional?

Posted on 2021-07-14, 15:12

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

So I've been tinkering with my 286 and something has been bothering me. For info, motherboard matches the AL-6410. It has a total of 1MB RAM installed (36 DIP-16 chips on the motherboard, there are no SIPP or SIMM slots). There are switches on the motherboard to configure the RAM from 256K up to 1MB …

Re: What retro activity did you get up to today?

Posted on 2021-07-13, 23:54

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Spent today working on my 286, beginning to set it up as a proper EGA-era gaming machine (albeit with a VGA graphics card). I added a 2nd hard drive - a 104MB IDE HDD to compliment the 213MB IDE HDD already installed. Hey, I've had these puny working drives sitting in a box unloved, might as well …

Re: What retro activity did you get up to today?

Posted on 2021-07-11, 22:11

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Today I cleaned up a recent Socket 775-based PC that I was recently given for free, which is going to become a rough 2007-era gaming PC. Installed a Core 2 Quad Q6600 CPU and setup Windows 7 (no way in hell I was putting Vista on there!). It currently has a GeForce 9500GT graphics card installed, …

Re: Bought these (retro) hardware today

Posted on 2021-07-11, 12:04

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Got myself 1 of these: 705642.jpg Stock image from the web as it hasn't arrived yet. Didn't have any PS/2 compatible optical mice in my collection and really could do with 1 to use on my Amiga & Atari ST. Got it fairly cheaply with 2 other generic mice which are likely not PS/2 compatible so will …

Re: Help with MSI KN72 DELTA 2 !

Posted on 2021-07-10, 23:00

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Could possibly be bad capacitors that don't necessarily look visually bad. I also have an MSI K7N2 motherboard (running an Athlon XP 3200+) that occasionally likes to act just like this, turns on and no video signal or any other sign of activity. It always comes back to life after a short while and …

Re: Help with MSI KN72 DELTA 2 !

Posted on 2021-07-10, 17:26

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Could possibly be bad capacitors that don't necessarily look visually bad. I also have an MSI K7N2 motherboard (running an Athlon XP 3200+) that occasionally likes to act just like this, turns on and no video signal or any other sign of activity. It always comes back to life after a short while and …

Re: Retro computer builds that surprised you the most because they worked better than expected

Posted on 2021-07-08, 12:22

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

My 286 12MHz build kind of surprised me. At the time I built it, my slowest PC was a 386SX 16MHz (an Olivetti-branded slim form factor PC, with everything onboard), so the 386 was my base reference and I expected the 286 to be much worse. Surprisingly, I found the 286 to perform quite well and …

Re: Bought these (retro) hardware today

Posted on 2021-07-08, 10:50

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

A small and cheap purchase today, a CPU for an upcoming build - Intel Core 2 Quad Q6600. About £8 including postage and not from China, why not. Could have gotten it for a few £££ less if I'd waited/shopped around, but not going to quibble. The Q6600 is to be an upgrade for a PC I was given recently …

Re: What retro activity did you get up to today?

Posted on 2021-07-05, 19:19

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

A couple of bits of retro activities - firstly, got myself a little 17-compartment organizer to store all my various computer bits and catalog their location, rather than have them scattered in numerous places. So I've filled it with various DIP chips, processors, RAM, adapters, brackets etc. At …

Re: What retro activity did you get up to today?

Posted on 2021-07-01, 18:56

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Received a Kung Fu Flash cartridge for my Commodore 64 today, so I've been playing around with that for most of the day. Loading up a bunch of .CRT & .PRG files to a microSD card and testing stuff out. This is quite a nice cartridge and a good price too. I already have an EasyFlash 3 cartridge, but …

Re: Bought these (retro) hardware today

Posted on 2021-06-27, 05:44

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Here, have the PCI Geforce 5500 that I got earlier today for $10. I was originally going to throw it in my PowerMac G3 B&W, but as it turns out it lacks any kind of hardware acceleration in OS9. So, it'll sit on the shelf until I have something that can reliably utilize it. It's kind of overkill …

Re: Best operating system for DOS (and maybe Windows) gaming? (re: Pentium MMX 233, 80MB RAM)

Posted on 2021-06-24, 12:30

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Windows 98 SE should be fine on that. With regards to file sharing over the network using Windows file sharing, you can do it with modern Windows if you tweak the file sharing settings to be less secure. This should allow you to access a shared folder or drive on the 98SE PC from a modern Windows OS …

Re: What retro activity did you get up to today?

Posted on 2021-06-15, 18:51

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Decided to try an experiment today. I wondered if the Cheetah Annihilator joystick, as provided with the C64GS, would work on the MSX. Particularly, it's weird non-standard 2nd button that only works with a handful of C64GS games. I did a quick google search, but couldn't see any reference to …

Re: I recently found this hardware, AKA the Dumpster find thread.

Posted on 2021-06-12, 10:02

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

DundyTheCroc wrote on 2021-06-09, 10:52: 4. When the truck came to load old HW I grab from it nice looking Dell GX1 pc.jpg They're nice looking systems, I have 1 myself, but the thing that really irks me about them - the lack of AGP. If they had an AGP slot, they'd be a killer classic 440BX-based …

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