Technical data

Error reaction If the calculated address of the memory location is not in the range
shwon, the CPU detects a runtime error and calls
OB 31, providing it
is loaded. If OB 31 is not loaded, the CPU goes to the stop mode.
In both cases, error IDs are entered in ACCU-1-L, that define the error
in greater detail (see Section 5.6.2).
Load and transfer
operations for the global
memory organized
in words
Operation Operand Description
LW GW
LW GD
TW GW
TW GD
-32768 to
+32767
-32768 to
+32767
-32768 to
+32767
-32768 to
+32767
add the specified constant to content
of the BR register and load the word
addressed in this way in ACCU-1-L
1) 2)
add the specified constant to content
of the BR register and load the double
word addressed in this way in ACCU 1
2)
add the specified constant to content
of the BR register and transfer the
content of ACCU-1-L to the word
addressed in this way
add the specified constant to content
of the BR register transfer the
content of ACCU 1 to the double
word addressed in this way
1)
ACCU-1-H is set to ’0’.
2)
ACCU 2
new
: = ACCU 1
old
Permissible address area The absolute address must be as follows:
•• for LW GW, TW GW: between 0 and EFFFH
•• for LW GD, TW GD: between 0 and EFFEH
Error reaction If the calculated address of the memory location is not in the range
shown, the CPU detects a runtime error and calls
OB 31, providing it
is loaded. If OB 31 is not loaded, the CPU goes to the stop mode.
In both cases, error IDs are entered in ACCU-1-L, that define the error
in greater detail (see Section 5.6.2).
Table 9-9 Operations for access to the global memory organized in words
Operations with the Base Address Register (BR Register)
CPU 928B Programming Guide
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