Siemens CPU 948 - Memory Assignment in the CPU 948

8.2 Memory Assignment in the CPU 948
With the CPU 948, there are two possible user memories (RAM)
available:
•• the CPU 948-1 with 640 Kbytes of user memory
•• the CPU 948-2 with 1664 Kbytes of user memory.
Fig. 8-1 illustrates the distribution of the address area of the CPU 948
and the location of the user memory versions.
Peripheral Area (S5 bus)
System RAM
The last 20 words of the user RAM cannot be used.
640 Kbyte User RAM
(CPU 948-1)
1664 Kbyte User RAM
(CPU 948-2)
Bit no.:
Address:
0 0000H
1 0000H
2 0000H
3 0000H
4 0000H
5 0000H
6 0000H
7 0000H
8 0000H
9 0000H
A 0000H
B 0000H
C 0000H
D 0000H
E 0000H
F 0000H
F FFFFH
15
0
1)
1)
1)
Fig. 8-1 Memory assignment in CPU 948/overview
Memory Assignment in the CPU 948
CPU 948 Programming Guide
C79000-G8576-C848-04
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