Fastest motherboard with at least 1 ISA slot?

ISABAS - BASIC-52 with ISA slot isa slot full form - 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 isa slot full form It is marketed to industrial and military users who have invested in expensive specialized ISA bus adaptors, which are not available in PCI bus versions The PC

isa slot uses ISA is a standard bus architecture that was associated with the IBM AT motherboard