<The peripherals were never expandable, although a couple of engineers
<supposedly tried hacking a hard disk interface off the stacking connector
<in the 11/150. (An IDE interface would be slick if someone could do
<it).
The easiest way is to tweek the 8085 for the IO and use the floppy disk
or Tu58 connector as its a simple 8bit bidirectional parallel path.
the IDE side would have to have local smarts added.
If you want to expand it go qbus...
Allison