According to the manual, AOpen AP5TC is a rare Socket 7 motherboard (i430TX) with an SB-Link header.

There appears to be solder pads for SB-Link on the Intel D850EMV2. Its the right configuration of pins and given its proximity to the ICH2, I'm inclined to think its PC/PCI.

Just did a build with that mobo. Bios update appears through windows only.

ShovelKnight wrote on 2020-04-05, 14:42:

According to the manual, AOpen AP5TC is a rare Socket 7 motherboard (i430TX) with an SB-Link header.

I must be special then. Came up on that board in a motherboard lot. Yes your right it indeed does have sb-link. Almost feels kinda useless when it has isa slots already. Either way its a interesting board i hope can work with a 266 Tillamook.

2 more boards:
Legend QDI PlatiniX 4 (i850) (PGA423)
Gigabyte GA-6VXE7+ (693A) (PGA370)

I have recently acquired a new retro rig with the Abit ZM6 motherboard and can confirm that it has a working SB-Link header. This motherboard is based on the Intel 440ZX chipset (socket 370).

Just tested it with my Yamaha YMF724 and SB-Link worked perfectly.

What does the SB-Link do for us?

Velociraptor wrote on 2020-06-27, 17:31:

What does the SB-Link do for us?

Connecting a PCI sound card to the motherboard using SB-Link improves its compatibility with DOS games.

Broadly speaking, PCI sound cards use either SB-Link, DDMA or a TSR program to function under DOS. In terms of compatibility, SB-Link tends to give the best results followed closely by DDMA. Compatibility using a TSR program can be hit or miss, varying largely between games.

Aha! I'd googled it before but hadn't found a nice clear explanation like that. Thanks!