Siemens CPU 948 - Page 397

Load and transfer
operations on the
global memory organized
in bytes
Operation Operand Description
LY GB
LY GW
LY GD
TY GB
TY GW
TY GD
-32768 to
+32767
-32768 to
+32767
-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 byte
addressed in this way in ACCU-1-LL
1)
3)
add the specified constant to content
of the BR register and load the word
addressed in this way in ACCU-1-L
2) 3)
add the specified constant to content
of the BR register and load the double
word addressed in this way in ACCU 1
3)
add the specified constant to content
of the BR register and transfer the
content of ACCU-1-LL to the byte
addressed in this way
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 and transfer the
content of ACCU 1 to the double
word addressed in this way
1)
ACCU-1-LH and ACCU-1-H are set to ’0’.
2)
ACCU-1-H is set to ’0’.
3)
ACCU 2
new
: = ACCU 1
old
Error reaction The range of absolute addresses for the load and transfer operations
for the global memory organized in bytes
•• between F 0000H and F FFFFH (LY GB, TY GB),
•• between F 0000H and F FFFEH (LY GW, TY GW)
or
•• between F 0000H and F FFFCH (LY GD, TY GD).
Table 9-9 Operations for access to the global memory organized
in bytes
Operations with the Base Address Register (BR Register)
CPU 948 Programming Guide
C79000-G8576-C848-04
9 - 27