Technical data

9.3 Transferring Fields of Memory
Application You can use the system operations TNB and TNW to transfer fields of
memory (max. 255 bytes with TNB, max. 255 words with TNW).
With the TNB and TNW operations you can access both the local
memory area and the part of the global memory area organized in
bytes (F000 to F3FF, FC00 to FFFF).
Operations
Operation Operand Function
TNW
0 to 255 Field transfer 0 to 255 bytes
TXB --
Field transfer o to 255 words
Parameters Field length
Operand = number of bytes (TNB) or number of words (TNW)
End address of the source area
ACCU-2-L = End address of the source area
End address of the destination area
ACCU-1-L = End address of the destination area
The entire source and destination areas must be located in one of the
memory areas listed in Table 9-4 and
cannot overlap.
Permissible memory areas
Addresses Memory area
0000H to 1 FFFH
0000H to 3FFFH
0000H to 7FFFH
User memory:
User submodule (16 bits) 8 Kwords
User submodule (16 bit) 16 Kwords
User submodule (16 bit) 32 Kwords
Table 9-3 Operations for field transfer
Table 9-4 Memory areas permitted for TNW, TXB and TXW
Transferring Fields of Memory
CPU 928B Programming Guide
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