Tandy 1000 MS-DOS Reference Manual page 304

Chapter 13/ The DEBUG Utility
Notes
• If you enter R with no registername, DEBUG displays the con-
tents of all registers and flags, together with the next instruc-
tion to be executed.
• If
you include a registername, DEBUG displays the 16-bit
value of that register in hexadecimal, and then displays a
colon prompt. Change the contents of the register by entering
a one- to four-character hexadecimal value, or leave the con-
tents unchanged by pressing
I
ENTER
I.
The valid registernames
are:
!
j
L..J
,
LJ
i
~
!
I
L--
r
!
, I
'--'
AX
BX
CX
DX
SP
BP
SI
DI
DS
ES
SS
CS
IP
PC
F
1 :
I
I
'---'
i
i
L.1
Both IP and PC refer to the Instruction Pointer.
• Entering F as the registername causes DEBUG to display a
two-letter status code for each flag, showing whether it is set
or clear. To change any flag, enter the opposite code.
284
i
L:
, I
LJ
I I
LJ
, I
U
, I
I
i
'--'
i
i