HP-IB TestHP-IB Test
The HP-IB test performs a writ e/read operation to each of the registers of t he HP-IB IC. A
test pattern is written to each register in the HP-IB IC. The pattern is then read and
compared with a known value.
Passing the HP-IB test implies that the read/write registers in the HP-IB IC can store a logical
"1" or a logical "0," and that the HP-IB IC is functioning properly. Incoming and outgoing
HP-IB information will not be corrupted by the HP-IB IC.
RS-232C TestRS-232C Test
This test checks the basic interface functions of the RS-232C port. Both internal and
ext ernal port ions of t he port circuit ry are test ed. In order for t he RS-232C test t o pass, t he
RS-232C loopback connector must be installed on the RS-232C connector.
HIL TestHIL Test
The HIL test exercises both the HIL circuitry internal to the logic analyzer and the HIL
interface bet ween the logic analyzer and external keyboard, if an ext ernal keyboard is
connected. First, a read/write operation is performed to each of the registers of the HIL IC.
A test pattern is written to each memory location, read, and compared with a known value.
Second, if an external keyboard is connected to the HIL port, the keyboard controller that
resides in the keyboard is polled by the microprocessor. A test pattern is sent to the
keyboard controller and returned to the microprocessor by the keyboard controller. The test
pattern is then compared with a known value.
Passing the HIL test implies that the read/write registers in the HIL IC can store a logical "1"
or a logical "0," and that t he HIL IC is functioning properly. Also, passing t he HIL test implies
that the HIL pathway to the external keyboard is functioning and that the keyboard
controller can communicate with the microprocessor in the logic analyzer. Incoming HIL
information from the external keyboard will not be corrupted by the pathway between the
keyboard controller and microprocessor.
Di sk TestDi sk Test
The disk test exercises the disk controller circuitry by performing a read/write on a disk.
Eit her an LIF format t ed disk wit h 20 sect ors available space or a DOS format t ed disk wit h 5K
available space is required and should be insert ed in the disk drive. When t he disk t est is
executed, the disk is checked sector by sector to find any bad sectors. If no bad sectors are
found, a test file is created on the disk and test data is written to the file. Then, the file is
read and the test data is compared with known values. At the conclusion of the test, the test
file is erased.
Passing the disk t est implies t hat t he disk controller circuit ry in the logic analyzer and t he
disk read/write circuitry in the disk drive are functioning properly. The disk drive can read
and write to a LIF or DOS formatted disk, and the data will not be corrupted by the disk drive
circuitry.
Theory of Operation
System Tests (System PV)
8–14
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