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Siemens CPU 948 - Page 335

Siemens CPU 948
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Example
You can calculate the length of a filler block by finding the difference
between the end address of the last block stored and the address before
the next paragraph address.
Difference Calculation for length of filler block (including
header)
0 to 5 Add 10 to the difference
6 No filler block is inserted
7 to 10 Add 10 to the difference
11 to 15 Subtract 6 from the difference
Bit no.
Bit no.
Block List in DB 0
Memory
Header 1
Header 2
Header n
Body 1
Filler Block
xxxx0H
xxxx0H
Ascending
Addresses
xxxx0H
Body 2
Body n
= Paragraph addresses (16 word boundary)
Start Block 1
Start Block n
15
15
0
0
P
P
P
P
x
x
x
x
x
x
x
x
x
x
x
Fig. 8-5 Example: Location of blocks in memory
User Memory Organization in the CPU 948
CPU 948 Programming Guide
C79000-G8576-C848-04
8 - 11

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