Irwin 4100 Tape Controller Card vintage 8-bit ISA Board 34-pin floppy NEC N82077
Irwin 4100. search for " irwin magnetic 4100 tularc" for details. made by Irwin Magnetic Systems Inc. AccuTrak A120 or A250, Irwin models 2040,2080,2120. 34-pin floppy connectors, internal and external.