Technical data

3-68 Computer Group Literature Center Web Site
Test Descriptions
3
ACC2 - Register Access
Command Input
PPCx-Diag>ncr acc2
Description
This procedure tests the basic ability to access the NCR 53C8xx registers,
by checking the state of the registers from a software reset condition and
checking their read/write ability. Status registers are checked for initial
clear condition after a software reset. Writable registers are written and
read with a walking 1 through a field of zeros.
If no errors are detected, the NCR device is reset; otherwise the device is
left in the test state.
Response/Messages
After the command has been issued, the following line is printed:
NCR ACC2: Register Access................... Running --->
If all parts of the test are completed correctly, then the test passes:
NCR ACC2: Register Access................... Running ---> PASSED
If any part of the test fails, then the display appears as follows:
NCR ACC2: Register Access................... Running ---> FAILED
NCR/ACC2 Test Failure Data:
(error message)
Here (error message) is one of the following:
ISTAT Register is not initially cleared
SSTAT0 Register is not initially cleared
SSTAT1 Register is not initially cleared
SSTAT2 Register is not initially cleared
SIEN Register Error:
Address =________, Expected =__, Actual =__