i also have an apple card i cant id. its a half length card that says
DAVONG SYSTEMS, APPLE II UDS INTERFACE
Here is a table from my Grappler+ manual:
GRAPPLER+ DIP SWITCH SETTINGS
DIP SWITCH POSITIONS 1 2 3 4
Epson Printers * ON ON ON
NEC 8023/C.Itoh 8510 * ON ON OFF
Anadex Printers/Data South 180 * ON OFF OFF
Okidata 82 or 83 * OFF ON ON
Centronics 739-1 * ON OFF ON
* Switch 1 controls the MSB (Most Significant Bit, or 8th
data bit). When this switch is in the ON (+) position, the
MSB is NOT transmitted to the printer. When the switch
is in the OFF (-) position, the MSB is transmitted to the
printer and is under software control (se CTRL-I H and
CTRL-I X under TEXT COMMANDS.)
-Mike Ackerman