Avago Technologies LSI53C1010 - Manual (Page 41)

SCSI SCRIPTS Processors 3-1
Chapter 3
The SCSI SCRIPTS
Processor Instruction Set
This chapter describes the LSI Logic SCSI SCRIPTS processor
instruction set and contains the following sections.
•
Section 3.1, “Overview of SCRIPTS Instructions,” page 3-1
•
Section 3.2, “Instruction Descriptions,” page 3-4
•
Section 3.3, “Instruction Examples,” page 3-73
3.1 Overview of SCRIPTS Instructions
This section contains an overview of the instruction types supported by
the SCRIPTS processor. Instruction types are groups of commands with
similar functions. The commands for each instruction type, including all
legal forms, are described in detail in Sections
3.2 and 3.3 .
3.1.1 I/O Instructions
The I/O instruction type is selected when the two high order bits of the
DCMD register are 0b01, with opcode bit values of 0b000–0b100. I/O
instructions perform SCSI operations such as selection and reselection.
Each function is a direct command to the SCRIPTS processor. The I/O
operations, chosen with the opcode bits in the DCMD register, are
described in
Table 3.1 .