Sony BKDS-2530 Operation Manual page 15

!£ Test pin TP6
Used to check the processor I/O port outputs.
Connected to the buzzer.
Rear
F G
1 Indicators D6 to D9
Show information about the processor I/O board
outputs.
D6: unused
D7: blinks once per second
D8: blinks when vertical synchronization timing is
being synchronized to the internal timer output
D9: blinks when vertical synchronization timing is
being synchronized to an external reference signal
..........................................................................................................................................................................................................
1) Watchdog timer
A function which generates a reset signal to reinitialize
the firmware if the firmware hangs. To keep from
generating the reset signal when firmware is running
normally, the timer is cleared periodically.
H
J K
!¢ Test pin TP7
Used to check the processor I/O port outputs. Clears
1)
the watchdog timer .
1 Indicators D6 to D9
2 Switch S5
3 Switch S4
L
4 Connector CN7
5 Switch S2
6 Test pin TP11
7 Test pin TP12
8 Test pin TP10
9 Jumper COP1
0 Indicators D14 to D16
!¡ Termination switch
!™ Connector CN8
!£ Connector CN4
2 Switch S5
Sets the ISA bus address.
3 DIP Switch S4
Sets the ISA bus address (setting may not be changed).
4 Connector CN7 (40-pin)
Unused.
3(E)