myne wrote on 2026-09-01, 01:02:

jamesfmackenzie wrote on 2026-08-31, 11:20:

LSS10999 wrote on 2026-08-31, 10:52:

AFAIK no board had ever actually routed LDRQ1# as it's not of any real use for TPMs. However, on most boards LDRQ1# is routed to an unpopulated resistor footprint so you can solder a wire to make it accessible, preferably through a NC (unconnected) pin of an existing header.

You'll definitely need boardviews. Schematics can be of some help but not as much as boardviews, as you still need to manually look at the whole board to locate the footprint in question.

Thanks for the info!

Agree that the boardview is incredibly helpful. For my Z87-PRO it instantly revealed a single pull-up resistor for LDRQ1# (although it's under the PCH heatsink -- but that's another story 😂). Would be great to have the same for the X10SAE -- since it already has PCI slots and would make a great Time Machine. I'm sure there's a resistor or resistor footprint somewhere I could use 😎

Given that supermicro lists pin 20 as ldrq, you might have luck working backwards. Either follow the trace visually and confirm with multimeter, or clip onto 20 and poke empty pads hoping for a beep

The front has some candidates

Thanks for the help! Unfortunately no continuity to either of those from pin 20.

Comparing to other pins, pretty much all the other pins show some measurable resistance to those resistors (500-1500 ohm range). And the top one is directly connected to pin 10.

rasteri wrote on 2026-08-31, 13:12:

jamesfmackenzie wrote on 2026-08-31, 09:19:

Unfortunately the supposed LDRQ pin on the TPM header is indeed not connected.

Is it not connected to anything at all?

Unfortunately no. I've probed just about everything on the board and nothing I can find has any continuity with pin 20. I also probed pin 20 vs:

* TPM +3.3V pin -- no continuity
* SuperIO pins -- no continuity

I also (unsuccessfully) looked for some unpopulated pads with pin 20.

Compared to the other pins: many of those show direct conductivity with SuperIO pins and also measurable resistance with many components across the board.

My hope is that LDRQ is broken out from the PCH to some resistor or pad. But v difficult to find that without a boardview 🙁

https://theretroweb.com/chip/documentation/nc … 71838629925.pdf

Should be pin18.
They're usually connected if only for printers

Hi.
I’m a total noob. Have an unreliable and infuriating PIII board I couldn’t manage to fix.

Got an ASUS H81I-plus. Found LRDQ#1 shared with GPIO on an unpopulated resistor pad under the chipset heatsink. I still need to test the board though.

I need a dISAppointment somehow. And to actually test if that pad is correct with a GPIO23 toggling program as it’s a shared connection I believe.

Yeah idk I already wrote this reply once but this ******* phone decided to unload the webpage so I had to write it again…

There are 2.
LDRQ0 goes to SR72
LDRQ1 goes to SR71

I recommend looking into boardviewer and googling "ASUS Motherboard H81I-PLUS 1.01W Boardview Free Download-File format (*rar)"

I did not check LRDQ#0 in my files, good to know they are there.
However I still think I jumped the gun on this project, because I have no adapter to use…

Research never killed anyone.

Board tested, works fine. Tried enabling and disabling GPIO23, reading were as expected (+3.4V high, 0 low).
Got a nice wire soldered there. Tested for short. Used some capton to cover the heatsink.
All that remains is getting my hands on a dISAppointment…
Any tips regarding that are welcome 😀

MoltenEQ wrote on 2026-09-26, 15:38:

Board tested, works fine. Tried enabling and disabling GPIO23, reading were as expected (+3.4V high, 0 low). Got a nice wire sol […]
Show full quote

Board tested, works fine. Tried enabling and disabling GPIO23, reading were as expected (+3.4V high, 0 low).
Got a nice wire soldered there. Tested for short. Used some capton to cover the heatsink.
All that remains is getting my hands on a dISAppointment…
Any tips regarding that are welcome 😀

You may face Asus's firmware issue where addressing over 0x3FF hardwired off the LPC.
Thus no PnP. Another Asus B85/Z87 issue - usb to ps/2 translation leading to lmb phantom clicks. Priceless in Doom with RPG face to the wall and BOOM.
Least problematic mobod are Gigabytes Z87/B85 (own and tested both) then Asrocks poor W98 compatibility however - pcie graphics cards drivers conflict with no resolution path AFAIK.
MSI Z85M gaming also okay, same usb to ps/2 translation however.
Most of dual ps/2 connectors are Y cable compatible, so you may connect Leopold FC900 (ps/2 compatible top mechanical kb) and optical ps/2 mice of your choice.

Okay I’ve been beating around the bush a lot with this question but here goes nothing…
How can I obtain a dISAppointment nowadays?

MoltenEQ wrote on 2026-10-05, 18:51:

Okay I’ve been beating around the bush a lot with this question but here goes nothing…
How can I obtain a dISAppointment nowadays?

https://github.com/rasteri/dISAppointment

order the PCB and build one for example.

My Gigabyte Z97 board doesn't have an LPC debug/TPM header. I've been looking at a few boards that have the features I'd like, specifically the ASUS Z97-A/AR/E or the MSI Z97S SLI. Both Manuals include the TPM/LPC pinout, but both are missing the LDRQ. Has anyone documented the location of the LDRQ on either of these? Is there a list of motherboards where the LDRQ is accessible/known to work with the disappointment?

Scroll back a few pages.
I looked at, so far mostly 1156 boards but a few others too and put a spreadsheet up.
If someone wants to tidy it up and make it a gsheets/wiki, go ahead.

myne wrote on Yesterday, 02:01:

Scroll back a few pages.
I looked at, so far mostly 1156 boards but a few others too and put a spreadsheet up.
If someone wants to tidy it up and make it a gsheets/wiki, go ahead.

I did see one sheet, but nothing from socket 1150. I saw in a video rasteri made they said they used a 4790k (fastest single thread cpu below intel 100s chipset), which would require a 1150 socket and Haswell refresh support. I think the 81/85/87 chipsets were updated to support the 4790k so long as the manufacture released a bios update, but I know the 97 supports it in every version.

https://www.youtube.com/watch?v=7LIPTQjQAPE

1) Find boards you like https://theretroweb.com/motherboards?page=1&i … %5D%5Btype%5D=3
2) google various iterations of (boardname) "schematic" "boardview"
3) Go down that rabbit hole until you find it or give up
4) Open and look for LAD0 which will jump between chipset/tpm/header.
5) look for DRQ0, DRQ1 from there
6) if necessary because it's not labelled, compare to the chipset datasheet and see whether the exact correct pin really is an NC or goes to a resistor.

That's roughly the process I followed for every one on that list.

Have fun 😀

lilylarceny wrote on 2026-10-16, 15:10:

My Gigabyte Z97 board doesn't have an LPC debug/TPM header. I've been looking at a few boards that have the features I'd like, specifically the ASUS Z97-A/AR/E or the MSI Z97S SLI. Both Manuals include the TPM/LPC pinout, but both are missing the LDRQ. Has anyone documented the location of the LDRQ on either of these? Is there a list of motherboards where the LDRQ is accessible/known to work with the disappointment?

For LGA1150, I currently have a working system using ASRock H97M Pro4.
Z97M Pro4 should also work as the board layout around LDRQ1# is identical on both boards.

I'm not sure what exact feature you're looking at.
These seem to be in common on the boards you've referred from what I could tell:
- M2 socket.
- PCIe x16 slots for dual x8 SLI/CrossFire.
- 2 conventional PCI slots.