Technical data

Load and transfer
operations for pages
organized
in words
Operation Operand Explanation
LW CW
LW CD
TW CW
TW CD
-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 the opened
page into ACCU-1-L
1)
add the specified constant to content
of the BR register and load the double
word addressed in this way in the
opened page into 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 in the opened
page.
add the specified constant to content
of the BR register transfer the
content of ACCU 1 to the double
word addressed in this way in the
opened page.
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 CW, TW CW: between F400H and FBFFH
•• for LW CD, TW CD: between F400H and FBFEH
Error reaction If the calculated address of the memory cell is not in the range shown,
the CPU recognizes 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 9-11 Operations for access to the pages organized in words
9
Operations with the Base Address Register (BR Register)
CPU 928B Programming Guide
C79000-B8576-C898-01
9 - 37