2.9.2
Extended Register Set
The extended register set is specific to the VP7. To protect the system against illegal register accesses,
the extended register set can be locked by using the LOCKR register.
I/O Address
Range (Hex)
Name
Function
0160
WCR
Watchdog Control Register
0161
NMITCR
NMI Timer Control Register
0162-0167
Reserved
0168
LEDCR
LED Control Register
0169
LOCKR
Lock Register
0861
-
NMI Timer Recharge
A detailed description of the registers above can be found in the chapter Additional features / Extended
registers of the manual and in “SBS Tech. Onboard I/O (Plug & Play capable systems) Programmers
Manual” (M_PGM_IOPNPSYS).
2.9.3
Interrupts
The interrupt routing for standard components such as COM1/2, LPT1, ... is in compliance with standard
PC/AT systems. Unused interrupts can be used for add-on cards or other board specific PCI devices
such as SCSI and Ethernet.
Hardware IRQ
IRQ Source
INTC1
IRQ00
System Timer
IRQ01
Keyboard
IRQ02
Cascade from INTC2
IRQ03
COM2
1)
IRQ04
COM1
1)
IRQ05
LPT2
1)
IRQ06
Floppy Disk Controller
IRQ07
LPT1
1)
INTC2
IRQ08
Real Time Clock
IRQ09
unused
IRQ10
COM4
1)
IRQ11
COM3
1)
IRQ12
PS/2 Mouse
2)
IRQ13
Numeric Coprocessor
IRQ14
Flash disk
IRQ15
unused
NMI
IOCHCK
NMI-Timer
Reset Switch
Parity Error,
ECC Error,
System Error
Memory Controller
1)
This interrupt is available when no ISR (Interrupt Service Routine) is installed.
2)
This interrupt is available when PS/2 mouse is not connected.
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