Hardware Reference
In-Depth Information
Command
Meaning
Function
Unassemble
Unassemble (disassemble) code into mnemonic instructions starting at the
specified address. If no address is specified, disassembly starts from the
address given by CS:IP.
Examples:
U
disassembles code starting at address CS:IP.
U 200
disassembles code starting at address CS:0200.
U [addr]
Unassemble (disassemble) code into mnemonic instructions within
the specified range of addresses.
Example:
U 200 400
disassembles the code starting at address CS:0200 and ending at address CS:0400.
U [range]
Write
Writes data to disk from the specified address. The file specification is
taken from a previous Name (
N
) command. If the address is not specified,
the address defaults to that specified by CS:IP. The file specification is
located at CS:0080.
W [addr]
Notes:
(a) Parameters enclosed in square brackets ([and]) are optional.
(b) The equal sign (=) must precede the start address used by the following commands: Go
(G)
, Proceed
(P)
, and Trace
(T)
.
(c) Parameters have the following meanings:
Parameter
Meaning
Address (which may be quoted as an offset or as the contents of a segment register or
segment address followed by an offset). The following are examples of acceptable addresses:
addr
CS:0100
04C0:0100
0200
A byte of data (i.e. a value in the range 0 to FF). The following are examples of acceptable
data bytes:
byte
0
1F
FE
filespec
A file specification (which may include a drive letter and sub-directory, etc.). The following
are examples of acceptable file specifications:
MYPROG.COM
A:MYPROG.COM
C:
\
PROGS
\
MYPROG.COM
The number of instructions to be executed within a Trace
(T)
or Proceed
(P)
command.
(
continued
)
instr
