Avago Technologies LSI53C825AE User Manual
Page 214
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SCSI SCRIPTS Instruction Set
If the comparisons are false, the LSI53C825A fetches the
next instruction from the address pointed to by the
register, leaving the instruction
pointer unchanged.
Call Instruction
The LSI53C825A 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 LSI53C825A executes a Call instruction, the
instruction pointer contained in the
register is stored in the
register. Since the
register is not a
stack and can only hold one Dword, nested call
instructions are not allowed.
If the comparisons are false, the LSI53C825A fetches the
next instruction from the address pointed to by the
register and the instruction
pointer is not modified.
illustrates the Transfer Control instruction.