Technical data

9.4.2
Accessing the Local
Memory
Application With the following operations, you can access the local memory
organized in words using an absolute memory address. The absolute
address is the total of the BR register contents and the 16-bit constant
contained in the operation (-32768 to +32767).
Operations
Operation Operand Description
LRW
LRD
Constant
(-32768 to
+32767)
Constant
(-32768 to
+32767)
add the specified constant to content
1)
of the BR register and load the word
addressed in this way in ACCU-1-L
add the specified constant to content
1)
of the BR register and load the double
word addressed in this way in ACCU 1
TRW
Constant
(-32768 to
+32767)
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
MAS, MBS
MSA, MSB
ACCU 1, BR
SAC
SAC
ACCU 1, BR
MAB, MBA
ACCU 1
BR
31
15
0
14
0
16
31 16
15
0
31
16
15
0
14
0
31
16
15
0
x
x
x..............
00
..............
0
Fig. 9-8 Register - register transfer operations
Table 9-7 Operations for accessing the local memory
Operations with the Base Address Register (BR Register)
CPU 928B Programming Guide
9 - 28 C79000-B8576-C898-01