This is an interesting board that was designed and produced long after most
companies in the S-100 era had come and gone. Howard Heart is well know as
one of the major sources of information for the S-100 bus. He has for
years mentioned a very large database of microcomputer manuals of great help
to us all. It can be accessed
here.
Back around 2004 the need for a more modern interface board to communicate
with the cheap and abundant IDE hard disks was becoming very apparent.
The old Winchester ST-506 type drives were no longer being made and were
clearly inferior to the newer IDE and SCSI drives. Howard designed and produced an S-100 board with an
IDE interface. He added many other features to the board utilizing modern
LSI chips with surface mount technology and high density.
The imprint on the board says the board is licensed to IMSAI (Fischer-Freitas)
but Howards site indicates it is also available from him.