PK-88 OPERATING MANUAL
APPENDIX G
G - 4
PK-88 - 166
port parameters (see QUESTION 3)). Default status is indicated by only the MULT LED being lit
on the front panel of the PK-88 when you turn it on. Setting PC-Pakratt for 4800 baud opera-
tion at the opening screen will ease switching between programs.
4. If you should get the message "UNABLE TO ESTABLISH COMMUNICATIONS..." etc., observe if
the MULT LED is still lit, and also if any other LED's besides MULT were lit while it was trying to
communicate with your PK-88. If the LEDs did move around while the program was running,
this means the program "saw" your PK-88 but could not link up with it. Remove any memory-
resident (TSR) programs you may be using. You may also run the command "CHKDSK" from a
DOS prompt to make sure you have over 320 KBytes of RAM free. Try another computer or se-
rial port.
If the LED's did not move at all, this means the program most likely did not "see" the PK-88.
Check your serial cable for proper configuration. Also check if your serial port is configured as a
DCE or a DTE. If the serial port is configured as a DCE, you will want to swap the TRANSMIT
and RECEIVE data lines. Refer to Chapter 2, page
19
, section 2.11.6 of the manual concerning
this. Chapter 2 also has some detailed connections for specific computers starting on page
18
,
section 2.11. Try another computer or serial port. If you have any other terminal programs,
bring one up and see if you can "talk" to the PK-88. If you can, make a new copy of the mal-
functioning program from the original disk and try again. Trying your PK-88 on another working
system is an excellent way to find the problem also. Please call AEA's Technical Support if prob-
lems persist.
SPECIAL NOTES FOR COM-PAKRATT USERS
1. To allow the PK-88 to work with this program in the split screen mode, a simple modification
must be done to the circuit board. To do this, simply short one end of R5 to one end of R7. Use
the end of the resistors that are closest to the outside edge of the board (see Figure 1, page
6
of this section).
2. Always use your keyboard overlays that came with the package! Channel 0 on the top (upper)
overlay lines up with the left-reading arrow key on the computer keyboard and Channel 1 lines
up over the "1" on the keyboard, etc. This will greatly simplify operation, and ease of use. Also,
always press "C=Q" when quitting either program in the HOST mode. All quotation marks are
used for clarification, and are NOT to be typed in.
3. There are two ways to start the program. You can press
T
for terminal mode, or press the
[
↵
]
key to go directly to HOST mode. You MUST turn it ON the way you turned it OFF, if you have
the battery enabled. If you turned it off in the terminal mode, first press
T
, and then turn on
the PK-88. If you turned it off in the splitscreen mode using "C=Q", you must have your PK-88
powered on, and then press
[
↵
]
at the opening screen. Both procedures are done presuming
you have your computer ON with either cartridge installed and the main menu is being dis-
played. Also refer to question 4 in "COMMONLY ASKED QUESTIONS".
