design change -- IPC semantics

[Bill Frantz]

At 11:24 PM 8/31/1999 -0400, shapj@us.ibm.com wrote:
>Unless I've missed something, the following keys still need to manipulate
string
>buffers after these changes:
>
>device keys (data buffer xmit/rcv)

In 370 KeyKOS, the device key used the string to define the channel
program.  The data buffer was defined with a restricted-format segment.
(If I remember correctly, the segment had to be defined with a node key.
The node could only contain r/w page keys.)