I'm looking for this information, too. Asus USB/MIR boards with only USB part populated are rather common and cheap, so it makes sense to add the "missing" parts on one of these. First of all I made a highres photo of my card and added some labels which are difficult to read. I was able to measure or read the values of the following parts:
CE1, CE2 = 1000 µF, 6.3V
L0, L4 = 10 Ohm
L1, L5 = 4.3 Ohm
(Labeling resistors with "L " is rather confusing.)

I was unable to measure the capacitors with my ESR meter inside the circuit:
C1 is parallel to CE1 and C6 is parallel to CE2 (both buffering +5V)
C2, C3, C4, C5 are shunt capacitors connecting the USB signal lines with GND.
(I think that I have to desolder the capacitors for measuring because they aren't labeled.)

Altogether I think that we need a "donor board" for reverse engineering where to desolder the parts before measuring. I've been looking for one at Ebay for a while but haven't found one, yet.

The L0, L1, L4, L5 etc are inductors.

The ones with 4R3 are 4.3uH. The ones labeled 100 are 10uH.

Probably not much help but it was common to parallel a 0.1uF ceramic cap with the High uF buffer caps on lots of old circuits....so C1 and C6 could be 0.1....

Oh, this adapter with PS/2 is available for purchase.. I just ordered one to reverse engineer for the future.

Same design, just not branded "Asus".
http://www.cablesonline.com/usbatxforcar.html

wiretap wrote on 2021-12-22, 01:16:

Oh, this adapter with PS/2 is available for purchase.. I just ordered one to reverse engineer for the future.

Same design, just not branded "Asus".
http://www.cablesonline.com/usbatxforcar.html

I use one of those with my P5A-b and it works great.

Let us know if that store is alive, it's got a Mary Celeste vibe about it to me.

Last time I ordered from there was about 8 months ago for some SCSI stuff for my Amiga, so they should still be open I hope..

Their eBay store (cablesonline.net)still seems active, tho they don't list that part there.

wiretap wrote on 2021-12-22, 00:54:

The L0, L1, L4, L5 etc are inductors.

The ones with 4R3 are 4.3uH. The ones labeled 100 are 10uH.

I only agree with you up to the point that every conductor is an inductor, too. I've measured the inductivity and the resistance with an LCR meter. The result is:
L0 = 8.4 µH
L0 = 10 Ω
L1 = 6.3 µH
L1 = 4.3 Ω
(note: The inductivity of the measuring cables itself is 42 µH which indicates how small the values measured are.)

When I consider my measurings and that what's written on the SMD parts it turns out that this MUST be resistors. (Labeling resistors with "L" on a PCB is very confusing.)

wiretap wrote on 2021-12-22, 01:16:

Oh, this adapter with PS/2 is available for purchase.. I just ordered one to reverse engineer for the future.

Same design, just not branded "Asus".
http://www.cablesonline.com/usbatxforcar.html

I found this one, too. They charge insane $65 for shipping to Germany with FedEx International (only shipping option to Germany). Mouser charges $20 for FedEx Express (or free shipping if order is >$50) in comparison to this. I'm glad that someone from the USA ordered this for reverse engineering. Thank you very much 😀

Hirsch wrote on 2021-12-22, 12:42:

I only agree with you up to the point that every conductor is an inductor, too. I've measured the inductivity and the resistance […]
Show full quote

wiretap wrote on 2021-12-22, 00:54:

The L0, L1, L4, L5 etc are inductors.

The ones with 4R3 are 4.3uH. The ones labeled 100 are 10uH.

I only agree with you up to the point that every conductor is an inductor, too. I've measured the inductivity and the resistance with an LCR meter. The result is:
L0 = 8.4 µH
L0 = 10 Ω
L1 = 6.3 µH
L1 = 4.3 Ω
(note: The inductivity of the measuring cables itself is 42 µH which indicates how small the values measured are.)

When I consider my measurings and that what's written on the SMD parts it turns out that this MUST be resistors. (Labeling resistors with "L" on a PCB is very confusing.)

To me, it looks like the standard IEEE implementation of USB EMC protection using an LC tee-circuit. It would be extremely odd to ignore the silkscreen from a design perspective, especially since it isn't the first rev of the board.

I'll check mine once it arrives.

SMD inductors that small *will* not have numbers.

These are resistors!

Cheers,

If you're sure of that, it is a crackhead design, because the resistors should be around 27ohm if that was to be an RC t-circuit. They are in series with the data lines, as they are on the matched impedance pair seen from the squiggly traces.

FYI, I have used plenty of 0805 inductors with markings.

wiretap wrote on 2021-12-22, 04:36:

Last time I ordered from there was about 8 months ago for some SCSI stuff for my Amiga, so they should still be open I hope..

Thanks, it looks 5 years out of date somehow.

iWill p55xb2 has a reiser like this that I’ve never been able to find. It’s a different card entirely though.

I documented it the best I could in the thread in my signature and on ultimate retro motherboard database. But being different I’m pretty sure it’s not of much help to you.

I found it more useful to tap into the port on the motherboard though because I wanted more ports and wired it into a internal usb hub

I think there are probably a lot of people looking for these though and a usb/ps2 reiser project would be a good idea if someone wanted to render the gerber file it could even be designed to work with DIN and mini DIN as well as have a usb hub on it for more ports.

I found a link to the "ATX FORM CARD" technical diagram, the card looks like "Asus USB / MIR"

https://jacek.unixstorm.org/elektronika/atx-form-card.html

Good find, thanks!

Nice. I'll build a KiCAD project based off that one, with a 3D printable bracket.

wiretap wrote on 2021-12-23, 16:47:

Nice. I'll build a KiCAD project based off that one, with a 3D printable bracket.

Add a usb hub to it! :p