Replaces the contents of the specified locations in virtual
memory and displays the new contents.
The DEPOSIT command, together with the EXAMINE command, aids
in debugging programs interactively. The DCL command DEPOSIT is
similar to the DEPOSIT command of the OpenVMS Debugger.
Requires user-mode read (R) and write (W) access to the virtual
memory location whose contents you wish to change.
Format
DEPOSIT location=data[,...]
1 – Parameters
location
Specifies the starting virtual address or range of virtual
addresses (where the second address is larger than the first)
whose contents are to be changed. A location can be any valid
integer expression containing an integer value, a symbol
name, a lexical function, or a combination of these entities.
Radix qualifiers determine the radix in which the address is
interpreted; hexadecimal is the initial default radix. Symbol
names are always interpreted in the radix in which they were
defined. The radix operators %X, %D, or %O can precede the
location. A hexadecimal value must begin with a number (or be
preceded by %X).
The specified location must be within the virtual address space
of the image currently running in the process.
The DEPOSIT and EXAMINE commands maintain a pointer to a current
memory location. The DEPOSIT command sets this pointer to the
byte following the last byte modified; you can refer to this
pointer by using a period (.) in subsequent EXAMINE and DEPOSIT
commands. If the DEPOSIT command cannot deposit the specified
data, the pointer does not change. The EXAMINE command does not
change the value of the pointer.
data[,...]
Specifies the data to be deposited into the specified locations.
By default, the data is assumed to be in hexadecimal format;
it is then converted to binary format and is written into the
specified location.
If you specify more than one item, separate the items with
commas (,). The DEPOSIT command writes the data in consecutive
locations, beginning with the address specified.
When non-ASCII data is deposited, you can specify each item of
data using any valid integer expression.
When ASCII data is deposited, only one item of data is allowed.
All characters to the right of the equal sign are considered
to be part of a single string. The characters are converted to
uppercase, and all spaces are compressed.
2 – Qualifiers
2.1 /ASCII
Indicates that the specified data is ASCII.
Only one data item is allowed; all characters to the right
of the equal sign (=) are considered to be part of a single
string. Unless they are enclosed within quotation marks (" "),
characters are converted to uppercase and multiple spaces are
compressed to a single space before the data is written in
memory.
The DEPOSIT command converts the data to its binary equivalent
before placing it in virtual memory. When you specify /ASCII,
or when ASCII mode is the default, the location you specify is
assumed to be hexadecimal.
2.2 /BYTE
Requests that data be deposited 1 byte at a time.
2.3 /DECIMAL
Indicates that the data is decimal. The DEPOSIT command converts
the data to its binary equivalent before placing it in virtual
memory.
2.4 /HEXADECIMAL
Indicates that the data is hexadecimal. The DEPOSIT command
converts the data to its binary equivalent before placing it
in virtual memory.
2.5 /LONGWORD
Requests that data be deposited a longword at a time.
2.6 /OCTAL
Indicates that the data is octal. The DEPOSIT command converts
the data to its binary equivalent before placing it in virtual
memory.
2.7 /WORD
Requests that the data be deposited one word at a time.
3 – Examples
1.$ RUN MYPROG
.
.
.
<Ctrl/Y>
$ EXAMINE %D2145876444
7FE779DC: 0000000000
$ DEPOSIT .=17
7FE779DC: 0000000017
$ CONTINUE
The RUN command executes the image MYPROG.EXE; subsequently,
Ctrl/Y interrupts the program. Assuming that the initial
defaults of the /HEXADECIMAL and /LONGWORD qualifiers are in
effect, the DEPOSIT command places a longword value 17 (23
decimal) in virtual memory location 2145876444.
Because the EXAMINE command sets up a pointer to the current
memory location, which in this case is virtual address
2145876444, you can refer to this location with a period (.)
in the DEPOSIT command.
The CONTINUE command resumes execution of the image.
2.$ DEPOSIT/ASCII 2C00=FILE: NAME: TYPE:
00002C00: FILE: NAME: TYPE:...
In this example, the DEPOSIT command deposits character data
at hexadecimal location 2C00 and displays the contents of
the location after modifying it. Because the current default
length is a longword, the response from the DEPOSIT command
displays full longwords. The ellipsis ( . . . ) indicates that
the remainder of the last longword of data contains information
that was not modified by the DEPOSIT command.
3.$ EXAMINE 9C0 ! Look at Hex location 9C0
000009C0: 8C037DB3
$ DEPOSIT .=0 ! Deposit longword of 0
000009C0: 00000000
$ DEPOSIT/BYTE .=1 ! Put 1 byte at next location
000009C4: 01
$ DEPOSIT .+2=55 ! Deposit 55 next
000009C7: 55
$ DEPOSIT/LONG .=0C,0D,0E ! Deposit longwords
000009C8: 0000000C 0000000D 0000000E
The sequence of DEPOSIT commands in the above example
illustrates how the DEPOSIT command changes the current
position pointer. Note that after you specify the /BYTE
qualifier, all data is deposited and displayed in bytes, until
the /LONGWORD qualifier restores the system default.
4.$ BASE=%X200 ! Define a base address
$ LIST=BASE+%X40 ! Define offset from base
$ DEPOSIT/DECIMAL LIST=1,22,333,4444
00000240: 00000001 00000022 00000333 00004444
$ EXAMINE/HEX LIST:LIST+0C ! Display results in hex
00000240: 00000001 00000016 0000014D 0000115C
The assignment statements define a base address in hexadecimal
and a label at a hexadecimal offset from the base address.
The DEPOSIT command reads the list of values and deposits each
value into a longword, beginning at the specified location. The
EXAMINE command requests a hexadecimal display of these values.