Installation guide

Table 1-10 (Cont.) System Interrupt Register
(SIR) 0x1C040110
Bits Access Description
11 R Reserved
10 R NRMOD manufacturing mode
jumper
9 R SCSI interrupt from 53C94 SCSI
controller
8 R Ethernet interrupt
7 R SCC(1) serial interrupt (comm port
2 and keyboard)
6 R SCC(0) serial interrupt (comm port
1 and mouse)
5 R TOY interrupt
4 R PSWARN power supply warning
indicator
3 R Reserved
2 R SCSI data ready
1 R PBNC
0 R PBNO
Note
Comm port 1 is the same as serial line 2.
Comm port 2 is the same as serial line 3.
TROUBLESHOOTING INFORMATION 1–21