Avago Technologies LSI8751D User Manual
Page 223
Transfer Control Instructions
6-27
Call Instruction
The LSI53C875 can do a true/false comparison of the
ALU carry bit, or compare the phase and/or data as
defined by the Phase Compare, Data Compare, and
True/False bit fields.
If the comparisons are true, it loads the
register with the contents of the
register and that address
value becomes the address of the next instruction.
When the LSI53C875 executes a Call instruction, the
instruction pointer contained in the
register is stored in the TEMP register.
Since the
register is not a stack and
can only hold one longword, nested call instructions are
not allowed.
If the comparisons are false, the LSI53C875 fetches the
next instruction from the address pointed to by the
register and the instruction
pointer is not modified.
illustrates the Transfer Control instruction.