DEBUG

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Supported DOS versions:	All versions
How easy to use?	Hard
How safe to use?	Potentially very dangerous
How common?	Fairly obscure
Internal or external command?	External

Description

A program testing and editing tool.

Command Syntax

Starting Debug

DEBUG [filename [testfile-parameters]]

filename Specifies the file you want to test.
testfile-parameters Specifies command-line information required by the file you want to test.

Debug Commands

The following are typed at the DEBUG prompt.

Do this...	...by typing this
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] [value]
unassemble	U [range]
write	W [address] [drive] [firstsector] [number]
allocate expanded memory	XA [#pages]
deallocate expanded memory	XD [handle]
map expanded memory pages	XM [Lpage] [Ppage] [handle]
display expanded memory status	XS

Comments

DEBUG is very powerful and can cause serious damage to a disk if not used properly. I'm not going to give any examples of how to use it here. If you accidentally get into it, press Q to get out quickly.

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