Reply 40 of 46, by adalbert
Well, I guess that it would be only possible (without extremely high costs) to make such a simple board, like this 386SX:
https://www.recycledgoods.com/forcom-technolo … 86-motherboard/
https://www.philscomputerlab.com/forcom-m396f.html
It's just a 2-sided board (you can see that it's transparent inside, no internal traces, blurred traces from the other side are visible), only 6 chips (2 SMD, 4 THT, no BGA) and less than 100 discrete components, all of them are THT type, so they could be even soldered by hand. PCB probably would be easy to manufacture, but someone would have to re-design it. Or remove all components from a single board, remake it and steal the design... 😜
That chipset was available on AliExpress https://aliexpress.com/item/SARC-QFP208-RC201 … 2657799996.html for 12USD, but it's out of stock now. Components would be probably hard to get. But it should be possible to make, it looks even less complicated than a PC-XT clone (Sergey's XT). But difficulty level would rise exponentially while increasing PCB complexity.
But that's just a 386SX without cache, it sucks 😜
//update: here you can buy that chipset for 13.54USD
https://www.utsource.net/itm/p/1725835.html
keyboard controller: 1.28 USD
https://www.ebay.com/i/222106201158?rt=nc
RTC: should be easy to get, 3-10USD
https://www.ebay.com/itm/M5818-AI-9315-TS7-A3 … wEAAOSwPhdU9YlB
TK9207 ~2USD/piece
https://aliexpress.com/store/product/TK9207-D … 2560569163.html https://www.utsource.net/itm/p/1384137.html
BIOS? well, the EPROM should be pretty cheap, but the software should be licensed...
Brand new 386SX CPU? that's hard to obtain, more expensive than used ones, around 50USD
http://www.ebay.co.uk/itm/AM386SX-SXL25-Integ … 5MAAOSwsWpZ4gOZ
Well, other componens could be easily sourced from local electronic stores, someone could try to copy that design, but honestly I don't want to try doing that 😜
Repair/electronic stuff videos: https://www.youtube.com/c/adalbertfix
ISA Wi-fi + USB in T3200SXC: https://www.youtube.com/watch?v=WX30t3lYezs
GUI programming for Windows 3.11 (the easy way): https://www.youtube.com/watch?v=d6L272OApVg