Mostek z80 - P-Port Command; Description of P Command

3.50 P-PORl' CCMMAND
FORMAT:
,~ ~CR)
,f s,f(CR)
3.51 DESCRIPTION, P COMMAND
< Examine or modify Port.
< Tabulate ports.
(1)
(2)
3-35
Format (1) is used to examine or modify port "a". When this format is
entered, the port address is displayed followed by space and the value read
from the port. The user may optionally enter a hexadecimal number to be
output to the port. Another port may also be examined by entering a comma
and the address in addi tion to the update data. rIb perform the next P
calUuand
operation, one of the special keys (.), (/), (UP) or (CR) must be
entered. The function of the special key depends if output data had been
entered as follows.
SPECIAL KEY OUTPUT DATA ENTERED NO OUTPUT DATA
(.) Return to AIM monitor. Return AIM monitor.
(I) Output data, return Return to AIM monitor.
to AIM monitor.
(UP)
(CR)
Output data, Display
current port.
Output data, Display
next port.
Display previous
port.
Display next port.
Format (2) is used to tabulate ports "s" through II f". Sixteen ports