On Sat, 30 Jun 2007, Bill Sudbrink wrote:
The first hard disk I saw in a 5150 used a controller
with a ROM installed
in that
socket. I'm pretty sure that it was 3rd party, don't remember the company.
"MBI" sold an expansion ROM for that socket. I don't remember what it
did; maybe CGA graphics screen print? I should dig it out and dump it.