I recycled ISA slot from some old dead MB, maybe hard to find nowdays. In the past many MBs passed through my hands but slots wasn't much focus of my interest...

It might come to that, although they shouldn't be hard to buy on ebay/ali, or at least weren't in past. I will have to buy some chip sockets etc. anyway so I should stock up a bit on those. I have 4 more bridge chips and 4 more PCBs...

Getting such from ebay is pain coz of shippng cost, did you look for some local scrapyard? I have some dead 386 MB here waiting for reapir if not successfull I'll shave off most components like slots and SIMM sockets...

Having a pile of mint sockets for couple tens of € is better than spending time heatgunning off scraped and otherwise questionable sockets. As far as scrapyards go, retro stuff is long gone from such places in this part of the world. But I do remove connectors on stuff I have that will get recycled, just there's not much of that to go around anymore, I thinned out my collection very dramatically before I moved from Estonia to Norway.

Hello!

I really want to assemble such an adapter.
Where can I get a complete list of used components?
I couldn't find a list of components on github.
Which chips can be used? Will the F85226AF be suitable?

https://www.ebay.com/itm/364246750652
https://aliexpress.com/item/1005007951022716.html

Andrey_Ak wrote on 2025-01-29, 19:01:

Hello! […]
Show full quote

Hello!

I really want to assemble such an adapter.
Where can I get a complete list of used components?
I couldn't find a list of components on github.
Which chips can be used? Will the F85226AF be suitable?

https://www.ebay.com/itm/364246750652
https://aliexpress.com/item/1005007951022716.html

Both F85226FG and F85226AF can be used provided they aren't defective.

Some KiCAD plugins like JLC Fabrication Toolkit can produce a BOM in CSV form that can be used as a reference when shopping components.

I personally have gotten the v0.2 working. It's just you need to add an extra 8.2k resistor between two ISA slot pins (you can see previous posts for details).

Connectors like ISA slot and ATX24 may require some effort to find, though.

Thank you. Can you just give me a list of components for the v.0.2 board?
I can't find this list in the project on GitHub.
I can easily desolder the ISA and ATX connectors from old non-working boards.

Do you think it will be possible to run this floppy disk controller with such an adapter?:
https://texelec.com/product/quad-flop-four-po … oppy-controller

Andrey_Ak wrote on 2025-01-30, 03:23:

Thank you. Can you just give me a list of components for the v.0.2 board?
I can't find this list in the project on GitHub.
I can easily desolder the ISA and ATX connectors from old non-working boards.

You need a 2x10 (2.54mm) header for connecting the adapter to your host's TPM port. You'll need to make your own cables depending on the actual pinout on the motherboard, as it might differ among board vendors.
Additionally, a 1x2 (2.54mm) header for a PSON jumper. Be noted that:
- If you use a separate power source (e.g. a 12V-to-ATX adapter) you'll need to short it to supply power.
- If you're using a ATX-24 splitter with the host PC's PSU to connect both the motherboard and the adapter at the same time, then you must leave it open or it'll interfere with the PC's own power switch functions.

Here's a list of other components you'll need for assembling v0.2, other than headers, F85226, ISA slot and ATX connector. The info is exported from the KiCAD project using plugins.

C1, C2, C3, C4, C5, C6, C7, C8 (8x): 100nF SMD caps (1206)
C15, C16, C17, C18, C19 (5x): 10uF THT polarized caps (D5.0mm)
D1, D2, D3, D4, D5 (5x): SMD LED (1206) -- Note that all LEDs are of the same orientation. The markers for negative rails (-12V/-5V) may be misleading).
F1, F2, F4, F6 (4x): 500mA SMD Fuse (1206)
R1, R2, R11, R12, R13, R14, R15 (7x): 1K SMD resistors (1206)
(NOTE: If the LED looks too bright you may consider using higher ohms such as 2K for R11-R15 which connect to respective LEDs in series, to hopefully lower its brightness)
R3, R4, * (3x): 8.2K SMD resistors (1206) -- You need to solder an additional resistor between MASTER# and +5V on the ISA slot, or it will prevent system from booting as well as causing other issues. For the location you can refer to the KiCAD PCB file.
R5 (1x): 10K SMD resistor (1206)
R6 is DNP (leave it unpopulated).
R7, R8, R9, R10, R16 (5x): 4.7K SMD resistors (1206)
RN1, RN2, RN3, RN4, RN5, RN6, RN7, RN8, RN9, RN10, RN11, RN12, RN13, RN14, RN15, RN16, RN17 (17x): 8.2K Resistor Arrays (4x0603 concave)
RN18 (1x): 1K Resistor Array (4x0603 concave)
U2 (1x): L7905 (TO-220-3 vertical)

NOTE: The current version of dISAppointment is v0.3. However, I was not able to get that version working. The one I got working is v0.2 which resides in hardware/gerb/disappointment_v0.2.zip.

Thanks!

Great work Rasteri - this is an amazing project!

Guys, I think I've found solid evidence to support that the Intel 100+ chipset still has the LPC bus inside.

https://nnz-ipc.ru/files/documentation/advant … user_manual.pdf

allemde wrote on 2025-03-13, 14:06:

Guys, I think I've found solid evidence to support that the Intel 100+ chipset still has the LPC bus inside.

https://nnz-ipc.ru/files/documentation/advant … user_manual.pdf

LPC bus indeed "exists" in Intel 100+ chipsets. eSPI can be made to support LPC signals so existing LPC SuperIO solution can still be used.

It's the LDRQ# signal which sound cards (such as Sound Blaster family) need to use for DMA is gone from Intel 100 and onwards. SuperIO normally doesn't really make use of LDRQ# unless the board exposes its Floppy Disk controller, or ECP-capable Parallel port.

dISAppointment can be used in newer chipsets but it will only at best be useful for some industrial appliances that don't require DMA to function. For sound cards, only portions that don't require DMA such as FM synth, or directly accessing its I/O port, will work in this case.

LSS10999 wrote on 2025-03-13, 14:16:

LPC bus indeed "exists" in Intel 100+ chipsets. eSPI can be made to support LPC signals so existing LPC SuperIO solution can sti […]
Show full quote

allemde wrote on 2025-03-13, 14:06:

Guys, I think I've found solid evidence to support that the Intel 100+ chipset still has the LPC bus inside.

https://nnz-ipc.ru/files/documentation/advant … user_manual.pdf

LPC bus indeed "exists" in Intel 100+ chipsets. eSPI can be made to support LPC signals so existing LPC SuperIO solution can still be used.

It's the LDRQ# signal which sound cards (such as Sound Blaster family) need to use for DMA is gone from Intel 100 and onwards. SuperIO normally doesn't really make use of LDRQ# unless the board exposes its Floppy Disk controller, or ECP-capable Parallel port.

dISAppointment can be used in newer chipsets but it will only at best be useful for some industrial appliances that don't require DMA to function. For sound cards, only portions that don't require DMA such as FM synth, or directly accessing its I/O port, will work in this case.

Thank you for your reply! Now I understand why it won't work.
By the way, I recently contacted a chip dealer on Alibaba (a Chinese B2B platform that also belongs to the same company as AliExpress). He told me that the Fintek F85226AF would cost 51 RMB each for bulk purchases(100 PCS). This actually blows my mind—I never thought this chip could be so expensive. I wonder if any alternatives exist. Hope we can find one someday.

What is 51 RMB? To US $?
I already observed that the availability of the chip had decreased and price increased multiple time. AFAIK there's no suitable alternative or other Fintek compatible chip...

I bought mine F85226FG in 5.12.2019 for cca 11$ http://www.aliexpress.com/item/32839231409.html (no longer avail.)

RayeR wrote on 2025-03-14, 16:43:

What is 51 RMB? To US $?
I already observed that the availability of the chip had decreased and price increased multiple time. AFAIK there's no suitable alternative or other Fintek compatible chip...

I bought mine F85226FG in 5.12.2019 for cca 11$ http://www.aliexpress.com/item/32839231409.html (no longer avail.)

RMB is Chinese currency, which means each F85226AF costs about 8 USD. The F85226FG and F85226F have allegedly been out of production for a while. However, the F85226AF still appears to be in production. When I asked the dealer for 100 pieces, he only discussed the price and never mentioned any quantity limitations, suggesting he is very confident about stock availability. Additionally, the F85226AF is still listed on the Fintek website, so there’s probably no need to worry—maybe.

Aha, 8$ is a nice proce, but I still belive they require some MOQ or single piece price would be much higher than for 100pcs. I thik for all intetested vogons members here 10 would be far enough... I personally don't plan make another board but maybe as a backup would be good to have one spare chip...

I bought 2 pcs. From this seller:
https://aliexpress.ru/item/1005006873019772.html
I don't know if it's a fake or an original, I haven't soldered the board yet.

Full image:
https://tis.kz/temp/LPC-ISA/20250315_122544.jpg

RayeR wrote on 2025-03-14, 19:02:

Aha, 8$ is a nice proce, but I still belive they require some MOQ or single piece price would be much higher than for 100pcs. I thik for all intetested vogons members here 10 would be far enough... I personally don't plan make another board but maybe as a backup would be good to have one spare chip...

Indeed, a single purchase is quite expensive. However, I don’t believe this chip justifies such a high price (even at $8). Don’t get me wrong, the chip does meet the specific needs of us. But the actual manufacturing cost of this chip is questionable. Moreover, we may never know how much profit Chinese dealers are making off us. Maybe one day I’ll get the chance to visit Shenzhen and negotiate with these dealers in person.

Andrey_Ak wrote on 2025-03-15, 07:37:

I bought 2 pcs. From this seller: https://aliexpress.ru/item/1005006873019772.html I don't know if it's a fake or an original, I […]
Show full quote

I bought 2 pcs. From this seller:
https://aliexpress.ru/item/1005006873019772.html
I don't know if it's a fake or an original, I haven't soldered the board yet.

Full image:
https://tis.kz/temp/LPC-ISA/20250315_122544.jpg

I believe they are likely genuine. While Chinese manufacturers are skilled at producing counterfeits, this chip simply doesn’t meet the criteria for large-scale fake production.