Interrupt Level Switches - IBM RT PC Options Installation

TNL SN20-9864 (May 1987) to 75X0217
With the IBM RT PC 4-Port Asynchronous RS422A Adapter and the
correct cables, you can connect a system unit to ASCII terminals located up
to 1212 meters (3963 feet) from the system unit.
Note: If you use cables longer than 122 meters (399 feet), you must
provide surge protection. Also, do not install these cables outdoors.
Interrupt Level Switches
Address Range Switches
(Switch Bank 1)
(S:ChBankl
c:::J
0
c:::J
0
c:::J c:::J
0
c:::J
:=
c:::J
0
c::J
c:::J
L - I _ _ - - - '
o
0
"-----_-----'I L_I _--'
c:::J
0
o
0
c:::J
0
0
1 ,-----'1 ' - -1 ---'1
c:::J c::==:J
0
~
[=:J
0
L-_--'~L-.
- - - ' . 0
c:::J c:=::J
Interrupt Level Switches
Four 6-Pin Serial
Connectors
Use the following diagram to set the interrupt level on all the 4-port
adapters. Nonbuffered 4-Port Asynchronous adapters should be grouped
on one interrupt level, and Buffered 4-Port Asynchronous Adapters should
be grouped on another, preferrably higher, interrupt level.
Interrupt Level lOis recommended when using the 4-Port Asynchronous
Adapter together with the SCSI Adapter. If the 4-Port Asynchronous
Adapter is set for Interrupt Level 11, certain functions in the SCSI Adapter
may be affected. See "Adapter Conflicts" on page 1-19.
Switch Bank 1
Interrupt Level 9 Interrupt Level 1 0 Interrupt Level 11
Section 6. Communication and Network Adapter Options
6-31