Siemens CPU 948 - Page 398

If the absolute addresses are not in the range shown, the CPU detects a
load/transfer error (TRAF) and calls OB 32. If OB 32 is not loaded,
the CPU changes to the STOP mode with the error code TRAF
(ISTACK).
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
Error reaction The range of absolute addresses must be located
•• between F 0000H and F FFFFH (LW GW, TW GW)
or
•• between F 0000H and F FFFEH (LW GD, TW GD).
If the absolute addresses are not in the range shown, the CPU detects a
load/transfer error (TRAF) and calls OB 32. ACCU 1 contains the
error ID 1A01H. If OB 32 is not loaded, the CPU changes to the
STOP mode with the error code TRAF (ISTACK).
Table 9-10 Operations for access to the global memory organized
in words
Operations with the Base Address Register (BR Register)
CPU 948 Programming Guide
9 - 28 C79000-G8576-C848-04