Teknor Industrial Computers VIPer 821, Техническое справочное руководство

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& & & &. .. .0! 1! 0! 1! 0! 1! 0! 1!
Three 8-bit supervisor registers (x90h-x92h) are provided to set and control special I/O
features of the board. These registers can be assigned with three consecutive and
relocatable addresses.
SETUPS
Related Jumpers
No jumper setting is required.
BIOS Level
The base address of the first supervisor register (x90h) can be selected within 190h, 290h, or
390h. Registers 1 and 2 are located at the subsequent addresses.
To select the Base Address, use the Chipset Features, Supervisor Base Address option.
SUPERVISIOR REGISTERS
Supervisor Register 0 (x90h)
bit 0
R/W ENWD Enable/Disable watchdog circuit
bit 1 R/W CW D WD control (toggle) to reset the watchdog timer when ENWD is high)
bit 2 R/W ST1 En./Dis. /RTS2 for RS-485 (COM2)
bits 3-7 Reserved
Supervisor Register 1 (x91h)
bit 0
R PFO# Power Detection or Battery low status (0=PFO failed ; 1=PFO good)
bits 1-7 Reserved
Supervisor Register 2 (x92h)
bits 0-7
Reserved
# Active Low Signal