What are the advantages of ISA slots over PCI slots?

Adding an ISA Slot to a Modern Motherboard isa slot uses Register level control of PCI cards requires a significantly different skill and tool set than was required for ISA boards and often is done with third party isa slot adapter Old days PCs have ISA slot for installing expansion card Now, PCs have PCI In our Lab an ISA expansion card connect measuring instrument,

isa slot pinout Definition: ISA bus ; ISA Slots This diagram shows a motherboard with three 16-bit ISA slots ; Mixed ISA Slots Motherboards came with a mix of 8-bit and