Tandy 1000 MS-DOS Reference Manual page 286

Chapter 13/ The DEBUG Utility
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A segment address and an offset value. Example:
04BA:OIOO
An offset only, in which case the default segment is
used. DS is the default segment for all commands
except G, L, T, U, and W, for which the default seg-
ment is
es.
All numeric values are hexadecimal. A colon is
required to separate a segment designation and an
offset.
1
U
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u
byte is a one- or two-character hexadecimal value placed in or
read from an address or register.
drive is a one-digit value indicating which drive is to be used for
accessing or writing data.
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1
2
3
Drive A
Drive B
Drive C
Drlve D
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filespec is a file specification consisting of a drive specification,
filename, and filename extension. (The three fields are optional,
but at least the drive specification or filename should be
specified.)
list is a series of strings or byte values. List must be the last
command line parameter. For example:
CS:1~Hl FF 42 "XXX" 1A 3
portaddress is a hexadecimal value that specifies a port number.
It can have a maximum of four characters.
range is an area of memory, specified by either of these formats:
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addressl address2 .
Example:
C5 : 1 13 13 1 1 13
address2 must be an offset value.
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