What are these weird long ISA slots on this 386 board?

The ISA slot started life as a bus extension of the 8088, 8086 and 80286 processors used in the earliest IBM PCs It's thus a very simple and

This new 3 ISA slot PC will provide years of continued support for your critical ISA cards in a mid-tower chassis Supports Windows XP and older OS

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isa slot pinout There are some companies, such as ADEK, which still make motherboards with ISA slots However, those are only for some older CPUs , and