The table header is sent as a single 16-bit word which must contain the
Valid Flag and the number of data records. For a valid table, the header is
256 plus the number of data records. For example, to indicate a valid
table with one data record, the header is 257 (256 + 1 = 257).
CAUTION
When downloading data into the interrupt line allocation table,
DIAGnostic:DOWNload
does not determine if the table is large
enough to store the data. If the amount of data sent by
DIAGnostic:DOWNload
is greater than the (table) space allocated
by
DIAGnostic:NRAM:CREate
, system errors will occur. You can
recover from these errors by executing
DIAGnostic:BOOT:COLD
,
or by pressing the "Ctrl-R" keys on an RS-232 terminal while
cycling mainframe power.
Example: Assigning
an Interrupt Line
The following example shows how an additional interrupt line is assigned to
a programmable interrupt handler and reserved for a non-programmable
interrupter (Figure 2-6).
The program assumes that a VXIbus system contains an Agilent E1411B
5
1
⁄
2
-Digit Multimeter that is a servant to a second Agilent E1406A Command
Module at logical address 64. Since the command module is the only other
commander and is a programmable interrupt handler, it is assigned interrupt
line 2 by the resource manager. The E1411B, however, has its interrupt jumper
set for line 3. For the multimeter to communicate with the command module,
the command module must also be assigned to handle interrupt line 3.
Figure 2-6. Assigning an Additional Interrupt Line
Chapter 2
Configuring the Agilent E1406A Command Module 57
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