Technical data

9.2 Access using the Address in ACCU 1
Application Registers are memory cells used by the CPU to execute a STEP 5
program. Every register is 16 bits wide. Using the system operations
LIR (load a register indirectly) and TIR (transfer a register indirectly)
you can access the contents of the registers.
Operations
Operation Operand Function
LIR Register
no.
0 to 15
Load the
specified register with the
content of a memory word addressed by
ACCU 1 (20-bit address).
TIR Register
no.
0 to 15
Load the content of the
specified register
in the memory word addressed by
ACCU 1 (20-bit address).
The memory word is either in the local area (0000 to EFFF) or in the
the part of the global area organized in bytes (F000 to F3FF, FC00 to
FFFF).
The following pages explain
which registers you can use with the
operations.
Examples explain
how to use the operations.
Table 9-1 Operations for indirect memory access using registers
Access using the Address in ACCU 1
CPU 928B Programming Guide
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