HP 9000 300 Series Hardware Configuration Manual page 115

I.
10
~ ~ ~ ~
Select Code 23 Select Code 24 Select Code 26 Select Code 3<
Figure 10-2. GPIO Interface Card Select Code Settings
4. Make a note that the select code has been used and is no longer available.
5. Find the new select code's number in the set of select code labels supplied
with the interface. Replace the card's select code label with this new label.
If a number is not available, make a label that looks like the one removed
and stick it on the GPIO card.
Setting the Interrupt Level.
Set Interrupt Level switch, labeled U39 on the card,
to interrupt level 3 (00) as shown in Table 10-2 (interrupt level 3 is required for
HP- UX). If your application requires a different setting, refer to Table 10-2.
Table 10-2.
Interrupt Switch Switch
Level
1 0
3
0 0
4 0
1
5 1 0
6 1 1
Setting the Data-in Clock Source Clock Switches.
The Data-in Clock Source
switches are labeled U2. If you are connecting an HP 9884A Paper Tape Punch
to this interface, set these switches as shown in Figure 10-I.
The right-hand 3 switches set the clock source for the data input lines DIO
through DI7. The left-hand 3 switches set the clock source for the data input
lines DI8 through DII5. Select only one clock source (logic 0) for each group of
input lines. The three clock sources are:
10-6 Configuring Popular Accessory Cards