Debug

DOS and Windows have a program called DEBUG. This program continues to be shipped and has value because it does a number of things for you:

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] [first sector] [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	[adress] [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

See Peter Norton's Assembly Language Book for the IBM PC by Peter Norton and John Socha, Brady, 1989 for the details of DEBUG.

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