drei hdl midterm

use DEBUG.EXE to create and trace assembly programs

shows or edits contents of registers

accepts symbolic assembly instructions

displays machine code for assembly instructions

executes instructions one at a time with register display

describe and use general-purpose registers

holds result of arithmetic operations, input/output

holds base address in memory or used for computations

controls loops, shifts, rotates, string byte counts

holds data, addresses, or high word of arithmetic result

adds register/value/memory contents

transfers data between registers/memory/immediate

use DEBUG to explore memory segmentation

starting address of program’s code segment

starting address of program’s data segment

starting address of program’s stack segment

starting address of extra segment for data

discuss behavior of flags and status register

indicates result too long for register

indicates even/odd parity of result

indicates carry into upper 4 bits

indicates result is zero

indicates result is negative

enables/disables interrupts

controls string data transfer direction

indicates signed overflow occurred

use EDIT, TASM, and TLINK to create and run programs

MS-DOS text editor for source code

Borland assembler converting ASM → OBJ

Borland linker converting OBJ → EXE/COM

display a single character using DOS interrupt

BIOS interrupt for screen handling

DOS interrupt for input/output handling

prints a single character (DL register)

accept keyboard input using interrupts

accepts keyboard input with echo (AL stores char)

accepts keyboard input without echo

accept and display strings using interrupts

displays string terminated by “\\$”

accepts buffered keyboard input (with param list)

extended screen display of string

loads effective memory address of variable/string

use DEBUG.EXE to create and trace assembly programs

shows or edits contents of registers

accepts symbolic assembly instructions

displays machine code for assembly instructions

executes instructions one at a time with register display

describe and use general-purpose registers

holds result of arithmetic operations, input/output

holds base address in memory or used for computations

controls loops, shifts, rotates, string byte counts

holds data, addresses, or high word of arithmetic result

adds register/value/memory contents

transfers data between registers/memory/immediate

use DEBUG to explore memory segmentation

starting address of program’s code segment

starting address of program’s data segment

starting address of program’s stack segment

starting address of extra segment for data

discuss behavior of flags and status register

indicates result too long for register

indicates even/odd parity of result

indicates carry into upper 4 bits

indicates result is zero

indicates result is negative

enables/disables interrupts

controls string data transfer direction

indicates signed overflow occurred

use EDIT, TASM, and TLINK to create and run programs

MS-DOS text editor for source code

Borland assembler converting ASM → OBJ

Borland linker converting OBJ → EXE/COM

display a single character using DOS interrupt

BIOS interrupt for screen handling

DOS interrupt for input/output handling

prints a single character (DL register)

accept keyboard input using interrupts

accepts keyboard input with echo (AL stores char)

accepts keyboard input without echo

accept and display strings using interrupts

displays string terminated by “\\$”

accepts buffered keyboard input (with param list)

extended screen display of string

loads effective memory address of variable/string