Rom Test Procedure; Performance Verification Test - HP 64100A Service Manual

Model 64100A - Performance Verification
Figure
4-3.
Performance Verification Test.
4-15. ROM TEST PROCEDURE.
Purpose:
The ROM test verifies that all of the firmware in ROM used for boot-up and
performance verification is good. The test also checks that the CPU is able
to access ROM memory via the bi-directional address and data busses.
Area Tested:
All ROMs, the
latches data
circuitry, and
Operation:
multiplexed memory Address/Data bus to ROM, the
buffers, the CPU and its associated timing and
the demultiplexed Address/data bus to/from ROM.
address
control
a. This test is simialar to the ROM test which is performed during power up.
Although, there is a different error message.
b. Each test takes approximately 1/2 second.
c. A routine reads the ROM contents, computes a checksum and compares it
with a checksum also located in ROM.
d. See CPU section IV for more information about this test.
MF 4-11