Schlumberger Reflex 72, Installation Manual, Page: 25 / 36

Troubleshooting
Reflex 72 Reader Installation Guide
21
2
Display the system’s Registry Editor window.
3
Locate the Reflex 72 smart card reader’s registry parameters. The reader
parameters are located in this path:
My Computer
→
HKEY_LOCAL_MACHINE
→
SYSTEM
→
Current Control Set
→
Control
→
Services
→
Slbl4
→
Parameters
4
Double-click the COMMask parameter icon.
The Edit DWORD Value dialog box appears
5
In the Edit DWORD Value dialog box, modify the specification in the
Value data box to specify the COM ports to be polled.
The default COMMask value is F h (15 decimal). Converted to a binary
value, the default setting is
1111
, with one bit assigned to each COM port.
(COM1 occupies the Least Significant Bit, or LSB.)
To specify a bit mask that disables polling for one of the COM ports, assign
a setting of 0 (off) to its bit position, convert the resulting binary value to a
hexadecimal or decimal value, and enter that value in the
Value data box.
The following table shows some examples of COMMask settings.
NOTE
SchlumbergerSema recommends that you disable polling only for COM
ports that are causing problems. Allow the system to poll all other COM
ports.
6
Click OK to save the change.
Hex
Value
Decimal
Value
Binary Values:
Bit 4 Bit 3 Bit 2 Bit 1
COM Port Polling Status
F
15
1 1 1 1
1111
= All COM ports polled.
E
14
1 1 1 0
1110 = COM1 not polled.
D
13
1 1 0 1
1101 = COM2 not polled.
B
11
1 0 1 1
1011
= COM3 not polled.
7
7
0 1 1 1
0111
= COM4 not polled.