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Program Trace Routine
Fields of an instruction are always expected to be entered in the order f, j, a, x, h, i,
and u. Note that the h- and i-fields are combined. An external symbol may be used
for any field except the f-field, subject to the same restrictions noted for the ABSAD
command.
For specification of an address to the CHANGE command, $ and $P have the following
special meanings:
$P
$P-n$
P+n
$
$-n$
+n
CLEAR
The P register of the traced program.
Where n is an octal number used to compute a value offset negatively or
positively from $P.
The last value returned by the ABSAD command, or the last address plus one
changed (CHANGE) or dumped (DUMP). This allows the caller to continue a
dump or change operation immediately following the last area referenced, or to
change a cell at an address to be calculated by ABSAD without retyping the
absolute address.
Where n is an octal number, used to compute a value offset negatively or
positively from $.
The form $P (but not $P-n, $, or $-n) may also be used with the RELAD command.
Clears one or more flags. List the flags to be cleared as names separated by
commas. See the STATUS command for flag names and meanings.
DUMP (D)
Displays the program status. Separate each parameter by a comma. If no
parameter or an empty parameter (that is, two consecutive commas) is entered, all
registers and the carry and overflow designators are dumped. The parameters are:
A,X, or R
Dumps the indicated group of registers. To dump the contents of a single
register, use the register mnemonic or the octal address.
7833 1733–004 24–11