DT               Define Ten-byte Unit                          MASM Directive

[name]    DT        initialvalue,,,

Allocates and initializes one or more ten-byte units of storage.

Notes:     The optional name argument causes the assembler to
create a variable whose offset value is equal to the
current location counter value.  The variable will be of
type TBYTE.

The initialvalue argument may be any of the following:

*     integer expression (i.e.  12334d)
*     packed decimal (i.e. 0123456789)
*     1 or 2 character string constant (i.e. 'gh')
*     encoded real number (i.e. 2F0000000000000r)
*     DUP operator (i.e. 10 dup (?))
*     question mark (?) (i.e. 0,1,?,2)

The ? causes the assembler to leave the initial value
undefined.  To specify more than 1 initial value,
separate them with commas.

String variables of type TBYTE must not consist of more
than 2 characters.  The last character is placed in the
low-order byte of the word, and the first character (if
there are 2 characters) or 0 (if only 1 character) is
placed in the next byte.  Zeros pad the rest of the

Constants with decimal digits are treated as packed
decimal numbers, rather than integers.  In order to
specify a constant as an integer with DT, append a
letter specifying the number system to use to the end of
the number.  For example, append 'D' for a decimal
number or 'H' for a hexadecimal number.

See also: DB
See also: DW
See also: DD
See also: DQ
See also: DUP

DT Define Ten-byte Unit