Just wanted to get a PCI Promise SATA controller for Win98 use, only to go down the obscurities rabbit hole once more.
My first attempt got me this Chinese knock-off using a chip intended for motherboard integrated controllers. Thankfully it was new in the box and came with a drivers CD, because Promise drivers don't work with it. It works and performs as expected, but there's no connector for the HDD activity led.
I thought OK, these are relatively cheap, let's get another one to have the original thing and a working HDD led, only to end up with a Dell OEM card this time... Of course, Promise drivers don't work with it either. At least that one is flash-able to the Promise BIOS with the right utility that was kindly attached to the thread, some later version that doesn't exist on Promise's site, or I would never have managed to do so.
I think I'll stop trying with these cards.