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General Software® BIOS
CPB902
C P B 9 0 2 U s e r M a n u a l
76
© 2 0 0 8 F a s t w e l v . 1 . 5 b E
Menu Item
Options
Description
NMI Source
Disabled
Enabled
If enabled, connects the PFO signal to NMI.
PFO (Power Fail Output) signal is issued by a supervisor
if power voltage becomes lower than nominal value.
COM3…COM6
Base Address
100H
180H
200H
280H
СОМ
3...
СОМ
6 ports base address selection
COM3…COM6
Clock, MHz
1.8432 MHz
14.7456 MHz
СОМ
3...
СОМ
6 ports frequency selection.
When frequency of 14.7456 is selected, the exchange rate
is eight times as much compared to standard one.
COM3…COM6
IRQ Inversion
Disabled
Enabled
IRQ request lines bits inversion in interrupts ID register.
The inversion may be needed to provide compatibility with
multi-port card drivers.
COM3 Mode
COM4 Mode
COM5 Mode
COM6 Mode
RS232
RS422
RS485
СОМ
3...
СОМ
6 ports operation mode selection
IRQ1
PS/2 Kbd
Matrix Kbd
Interrupt source:
PS/2 keyboard
Matrix keypad, connected to J17 connector
IRQ5
FBUS
PC/104
IRQ5 from FBUS controller
IRQ5 from PC/104 interface
IRQ6
FDC
PC/104
IRQ6 from floppy disk controller
IRQ6 from PC/104 interface
IRQ7
LPT
PC/104
IRQ7 from printer controller
IRQ7 from PC/104 interface
IRQ8
RTC
PC/104
IRQ8 from RTC
IRQ8 from PC/104 interface
IRQ9
COM3…COM6
PC/104
IRQ9 from
СОМ
3...
СОМ
6 ports
IRQ9 from PC/104 interface
IRQ11
COM3…COM6
PC/104
IRQ11 from
СОМ
3...
СОМ
6 ports
IRQ11 from PC/104 interface
IRQ12
PS/2 mouse
PC/104
IRQ12 from PS/2 mouse
IRQ12 from PC/104 interface
IRQ14
OPTO_IRQ
PC/104
IRQ14 from optoisolated input
IRQ14 from PC/104 interface
This interrupt is available only if IDE Primary channel is disabled:
IDE0 Master – Not Installed, IDE0 Slave – Not Installed
IRQ15
NAND_FLASH
PC/104
IRQ15 from NAND Flash
IRQ15 from PC/104 interface
This interrupt is available only if IDE Secondary channel is disabled:
IDE1 Master – Not Installed