6 page
2192-09066-000-000
J206 PCIB40 Technical Manual
6
Special Function Registers
The green User LED is controlled by bit 0 when the pointer register is loaded with 80h.The board
identification register can be used to confirm that the board is present in the system and is the
correct board type. Other PCbus I/O boards in Arcom’s range will return a different value.
Read/Write
Functions
Pointer Bit
Pointer Name
Pointer Value
(hex)
Write
1=LED ON
0=LED OFF
Bit 0
Only
User LED Control
80
Read
Always 00
for the PCIB40
Bit 0-7
Board Identification
81
Write
0=Disabled
1=Enabled
Bit 0
Only
Output Enable Control
90
