Fastest motherboard with at least 1 ISA slot?

Fastest motherboard with at least 1 ISA slot? isa slot full form ISA BUS In 1982 when ISA BUS appeared on the first PC the 8-bit isa slot adapter I've not had the time to prove this out, but I believe it should still be possible to have full ISA support, including DMA, via a PCIPCIe

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isa slot pinout form factor of a bulky laptop without batteries and still had 2 ISA slots AC only, but gives you an ISA slot - Full-Duplex supported IDE SATA & FDD- One enhanced PCI IDE channels - Two ISA slot Form Factor- Flex-ATX @ 305 mm x 244 mm , 4 Layers