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

Posted on 2023-10-15, 17:10

by

by Thermalwrong

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Today I realised that I'm never going to find a spare Tseng ET4000/W32P chip available and I have to use what I have. I bought a broken Genoa Phantom 32i 8900VL card, probably from someone on here :) It started out looking like this: 3.jpg Now it looks like this: genoa-8900vl-repaired.JPG It's had a …

---

Re: SBEMU: Sound Blaster emulation on AC97

Posted on 2023-10-14, 18:03

by

by Thermalwrong

in Marvin \ Sound

in Marvin \ Sound

Ok, got Windows installed (and got DOS-mode). So, what works is Doom and Duke Nukem 3D, not bad. But what's not working is Death Rally :( That's a dealbreaker :D Edit: without jemmex it's working, epic That's good news, I've gotta try out SBEMU on my T42 / R42 laptop at some point. What memory …

---

Re: Need a bios file for a Geforce 4 Ti4200 8x AGP card

Posted on 2023-10-13, 23:40

by

by Thermalwrong

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hello, http://web.archive.org/web/*/https://whitebunny.net/* Here's a fairly complete crawl of the old whitebunny website with a lot of the BIOS files intact. Somebody should probably crawl that. Huh, that's an interesting site. Pulled it out with wayback-machine-downloader and fixed some filenames …

---

Re: Toshiba Tecra 550CDT HDD ribbon cable

Posted on 2023-10-13, 20:41

by

by Thermalwrong

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

It's an idea only at the moment, steps to make this: 1. Work out the pinout for the 40-pin connector by checking against the known 44-pin connector's pinout with a multimeter 2. Design up a small 2-layer PCB in KiCAD, which requires making these parts for the component library and a schematic based …

---

Re: Toshiba Tecra 550CDT HDD ribbon cable

Posted on 2023-10-13, 16:32

by

by Thermalwrong

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Wow guys, thx much! @Thermalwrong, do you think it's doable? I have some soldering skills and soldering iron, but never did something this tiny and I have no microscope 🙂 EDIT1: Unfortunately all this links don't have it in stock. I was not able to find it using the numbers provided either. :( …

---

Re: Toshiba Tecra 550CDT HDD ribbon cable

Posted on 2023-10-11, 18:04

by

by Thermalwrong

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

They have no stock, but the part codes may help for finding in other places: https://www.impactcomputers.com/p000245460.html?cpidx=149371 That's just a regular JAE connector, I wonder what it'd take to make a reproduction but cheaper - using 2x PCBs and a generic 44/50 pin flat cable.

---

Re: Asus V7700 broken transistor

Posted on 2023-10-10, 23:12

by

by Thermalwrong

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thank you for checking, if the pin nearest to the Q805 text is ground (i/o bracket is great) then that confirms it's essentially the same as the schematic excerpt I've shared, there are only minor differences in resistor values and maybe differences later in the circuit. Haha yep, I was thinking of …

---

Re: DigiPOS adventures!

Posted on 2023-10-10, 17:30

by

by Thermalwrong

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Ah before I forget, here's a new version of the inner side CD-rom mount. Now the CD-rom can be fitted or removed with just the screws on the outer bracket, the inner bracket now has a box to enclose the edge of the drive. That should mean it's much less awkward to put together, since the drive can …

---

Re: Asus V7700 broken transistor

Posted on 2023-10-10, 17:24

by

by Thermalwrong

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The parts nearest to it are the fan header on the other side of the board and the h/w monitor chip is very near to it, so I think it's for fan control. Reminds me of this thread which I found while trying to do some similar repairs on a GF3 Ti200 I think? https://www.vogons.org/viewtopic.php?t=87381 …

---

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

Posted on 2023-10-10, 14:04

by

by Thermalwrong

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Liquid flux is really for BGA and even then it's not great, like you say it just gets everywhere. Most pros I've seen on Youtube do also use the tacky flux for most BGA stuff. I'm on the fence about making a big Mouser order for supplies and flux - I've been using SMD291 which is a no-clean flux, …

---

Re: Searching for small microATX case

Posted on 2023-10-08, 01:10

by

by Thermalwrong

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hmm, that CiT S8 with the CD-ROM fitting seems like it'd be a good fit for my MS-6168-v2 build that I'm hoping to do soon. Found this picture for motherboard size constraints, the MS6168 is a fair bit smaller than that:

---

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

Posted on 2023-10-08, 00:35

by

by Thermalwrong

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I wonder if it's already going to the modem audio pin and is just muted with no modem activity. Just revisited this one today involving my M/75 and the KXL-D20 card. IT looks like pin 62 (pin for audio out to internal speaker) goes to a NEC 62522 Gate Array chip. Not sure what modem audio it would …

---

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

Posted on 2023-10-06, 14:06

by

by Thermalwrong

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

It might be a fault with DMA if you're getting bad digital audio with 2 cards, especially on something as old as a 286. I had a similar experience with a 386 motherboard that used an 82c206 and it turned out to be the 74F245 bus transcievers seemed to have some conductive dirt under them, removing, …

---

Re: The "Driver CD" for motherboards thread

Posted on 2023-10-06, 13:09

by

by Thermalwrong

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Can someone be so greatful to upload an archive of the driver cd for the Abit VH6T motherboard? I'm looking for it for quite some time. Thanks for any replyes! It's gonna look something like this. (The picture is not mine) Huh, I never spotted this thread before. Here's my driver CD - VT1.30M from …

---

Re: PC-XT Clone - HELP Repairing Battery Damaged Traces

Posted on 2023-10-05, 19:44

by

by Thermalwrong

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Looks like the traces are still visible at the camera level even if they don't pass current anymore 😀 Paint.net's Adjustments > "Auto-Level" function brings up what's there quite clearly, hopefully you can use that to rebuild the connections.

---

Re: Thinkpad 770Z

Posted on 2023-10-04, 23:51

by

by Thermalwrong

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

It comes off easily enough, just use a plastic scraper and/or plastic scouring pad. Keep applying IPA and only use a rag you will throw away or lots of kitchen roll. Don't clean it with a cloth you intend to keep, that black stuff never comes off. Though I haven't seen a 770 in over 20 years, I know …

---

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

Posted on 2023-10-04, 20:44

by

by Thermalwrong

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I'm having issues with the sound in Wolfenstein 3D. Two sound blasters are putting out sound effects which are cut in half. Like a sliding door can be heard only a fraction of the complete effect. The cards are CT1600 and CT3980, in a 286 16MHz with 5MB RAM. Let's see what happens when I disable …

---

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

Posted on 2023-10-03, 16:18

by

by Thermalwrong

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Good point, I'll try soldering it from the top-side instead then, where the hole is still okay and connected to ground. Thanks :) Great work! Neither is the retail Award BIOS. I'm still not sure which is least bad. I stuck my best one (the one that is stable at 133MHz with a Tualatin 1400S on a …

---

Re: DigiPOS adventures!

Posted on 2023-10-02, 21:05

by

by Thermalwrong

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thanks, but I think this riser card maybe different, I can only get traces from CN1 to CN2. On my later one the IDE pins go into the riser - incidentally is yours also a slot-1 connector? From the riser connector it then goes directly to the chipset, I don't think I ever actually traced a signal …

---

Re: DigiPOS adventures!

Posted on 2023-10-02, 21:02

by

by Thermalwrong

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

yeah actually I do lol. I would've been showing them off by now but the 2nd IDE connection is a tad unreliable on my one, waiting for some new 44-pin 2mm pitch cables. DigiPOS-CDrom-mounts.jpg Here you go - it's like revision 50. Needs a really slim bezel to be able to slide the case over the drive. …

---