
Installing & Working With System Components 4-5
4.03.2 INTERRUPT CONTROLLERS
Two 8259 interrupt controllers handle the interrupts on the VIPer808. Six interrupt lines
are directly linked to the keyboard controller, timer, the real-time clock, both serial ports
and the parallel port. Note that with Plug and Play, interrupt lines for I/O devices and the
Ethernet can be modified via software per system requirements.
TABLE 4-2:
8259 Interrupt Controllers
CONTROLLER # 1
CONTROLLER # 2
IRQ 0
Timer 0
IRQ 8
Real-time clock
IRQ 1
Keyboard
IRQ 9
Available (Ethernet)
IRQ 2
Cascade controller # 2
IRQ 10
Available
IRQ 3
COM 2*
IRQ 11
Available
IRQ 4
COM 1*
IRQ 12
PS/2 Mouse
IRQ 5
Available (LPT2)*
IRQ 13
Coprocessor
IRQ 6
Floppy controller*
IRQ 14
IDE*
IRQ 7
LPT 1*
IRQ 15
Available
* All functions marked with an asterisk (*) can be disabled or reconfigured.
4.03.3 COUNTER/TIMERS
There are three independent 16-bit 8254 Counter/Timers: Counter/Timer 0 is tied to
Interrupt 0, Counter/Timer 1 is used to generate the refresh with DMA Channel 0, and
Counter/Timer 2 is used for the Speaker Port.
Содержание VIPer808
Страница 21: ...Installing Memory 2 3 DIAGRAM 2 1 Assembly Top...
Страница 22: ...Installing Memory 2 5 DIAGRAM 2 2 Assembly Bottom...
Страница 26: ...Setting Jumpers 3 3 DIAGRAM 3 1 VIPer808 Jumper Locations with Default Settings...
Страница 28: ...Setting Jumpers 3 6 TABLE 3 1a Jumper Settings W1 W4 W13 W14...
Страница 29: ...Setting Jumpers 3 7 TABLE 3 1b AMD DX2 DX4 CPU Jumper Settings W1 W15 W15C...
Страница 30: ...Setting Jumpers 3 8 TABLE 3 1c AMD 5x86 CPU Jumper Settings W1 W15 W15C...
Страница 31: ...Setting Jumpers 3 9 TABLE 3 1d Intel CPU Jumper Settings W1 W15 W15C...
Страница 32: ...Setting Jumpers 3 10 TABLE 3 1e SGS CPU Jumper Settings W1 W15 W15C...
Страница 33: ...Setting Jumpers 3 11 TABLE 3 1f Jumper Settings W18 W20 W23...
Страница 92: ...Memory I O Maps B 1 APPENDIX B MEMORY I O MAPS B 01 MEMORY MAPS DIAGRAM B 1 Memory Map Diagram...
Страница 96: ...Mechanical Layout Block Diagram C 3 DIAGRAM C 1 Mechanical Specifications...