What is Debug?

What is Debug? Debuggers MS-DOS Assembly Source Break Points
MS-DOS Debug

     A software tool that facilitates the identification of errors in software system source code. Debuggers allow software developers to examine variables and memory locations, stop code execution at predefined break points, step through the code one line or unit at a time, etc. Debuggers can operate in batch, online, of interactive environments.
     Debug is a MS-DOS command which can be used to enter machine language into the computer either to create programs or test computer peripherals by receiving back various computer machine code.

MS-DOS 2.x - 4.x uses debug.com
MS-DOS 5.x and above uses debug.exe

MS-DOS Debug Commands
assemble A [address]
compare C range address
dump D [range]
enter E address [list]
fill F range list
go G [=address] [addresses]
hex H value1 value2
input I port
load L [address] [drive] [firstsector] [number]
move M range address
name N [pathname] [arglist]
output O port byte
proceed P [=address] [number]
quit Q  
register R [register]
search S range list
trace T [=address] [number]
unassemble U [range]
write W [address] [drive] [firstsector] [number]

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What is Debug? Debuggers MS-DOS Assembly Source Break Points