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System Service
NOTE
SP1 is the first register tested and the problem may not necessarily be in
SP1 but somewhere previous in the data path (Store logic, Shifter,
ALU, etc.).
A-3.
MEMORY TEST
A memory configuration test is available from the microprogram for testing memory. Memory config-
uration test diagnostic time is approximately ten seconds.
To run the memory diagnostics, perform the following steps:
a. Set the SYSTEM SWITCH REGISTER to %000200.
b. Press the ENABLE and LOAD switches.
c.
Program runs until an error occurs.
When an error occurs the program pauses and the CIR contains the error data (lamp on
=
error bit). By
pressing the RUN/HALT switch, the CIR then contains the address information shown in table A-2.
The test should be continued so all memory is tested before any repairs are made. The test is
terminated by pressing the HALT switch.
Table A-2. CIR Address Information
CIR BIT
FUNCTION
0:3
Address bits 0:3
6,7
Bank number
10:14
CPX1 register bits 2:6
10
(2) Illegal address
11
(3) CPU timer
12
(4) System Parity Error
13
(5) Address Parity Error
14
(6) Data Parity Error
15
Address bit 15
A-4.
I/O TEST
A Test Input/Output (TIO) instruction is executed on each I/O device number (3 through %177) in
sequence. Only those device numbers with a device connected will respond; empty device numbers are
skipped. To run the I/O test, perform the following steps:
NOTE
If the HP 30354A Maintenance Panel is connected to the system,
the TIMERS switch must be set to ENABLE.
A-2
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