Assembly language programming

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Assembly Language Programming
Appendix C

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A Small Assembly Language Program
(a) An assembly language program.
(b) The corresponding tracer display.

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The General Registers
The 8088 registers.

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Addressing (1)
Operand addressing modes.
The symbol # indicates a numerical value or label.

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Addressing (2)
Operand addressing modes.
The symbol # indicates a numerical value or label.

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The 8088 Instruction Set (1)
Some of the most important 8088 instructions.

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The 8088 Instruction Set (2)
Some of the most important 8088 instructions.

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The 8088 Instruction Set (3)
Some of the most important 8088 instructions.

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Conditional Jumps
Conditional jumps.

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Subroutine Calls
An example stack.

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System Calls and System Subroutines
Some UNIX system calls and subroutines available in the
interpreter.

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The ACK-Based Assembler, as88 (1)
The as88 pseudoinstructions.

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The ACK-Based Assembler, as88 (2)
Some of the escapes allowed by as88.

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The Tracer
The tracer’s windows.

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Tracer Commands (1)
The tracer commands. Each command must be followed by a carriage
return (the Enter key). An empty box indicates that just a carriage return
is needed. Commands with no Address field listed above have no
address. The # symbol represents an integer offset.

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Tracer Commands (2)
The tracer commands. Each command must be followed by a carriage
return (the Enter key). An empty box indicates that just a carriage return
is needed. Commands with no Address field listed above have no
address. The # symbol represents an integer offset.

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Hello World Example
(a) HlloWrld.s.
(b) The corresponding tracer window.

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General Registers Example
(a) Part of a program.
(b) The tracer register window after line 7 has been executed.
(c) The registers.

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Example Program (1)
The program vecprod.s.

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Example Program (2)
The program vecprod.s.

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Example Program (3)
The program vecprod.s.

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Example Program (4)
Execution of vecprod.s when it reaches line 28 for the first time.

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Example Program arrayprt
The program arrayprt before debugging.

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Example Program strngcpy.s
Copy a string.

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Example Program
reverspr.s
Print a string backwards.