American Megatrends Baby EISA User Manual page 12

Description,
Seven DMA Channels
The Baby EISA motherboard has seven DMA channels. Any DMA channel may be
programmed for 8, 16, or 32-bit DMA device size and ISA compatible, type
A, type B, or burst modes.
Fifteen Interrupt Levels
The motherboard has 15 hardware interrupt levels. The NMI takes
precedence over hardware interrupts.
Timer Features
The Baby EISA motherboard has five programmable 16-bit counter/timers.
System Arbiter
The Baby EISA motherboard has standard EISA arbitration features.
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Continued
Priority Label
1 IRQ 0
2 IRQ 1
3 – 10 IRQ 2
3 IRQ 8
4 IRQ 9
5 IRQ 10
6 IRQ 11
7 IRQ 12
8 IRQ 13
9 IRQ 14
10 IRQ 15
11 IRQ 3
12 IRQ 4
13 IRQ 5
14 IRQ 6
15 IRQ 7
Chapter 1 - System Overview
Typical Interrupt Source
Interval Timer 1, Counter 0 OUT
Keyboard
Used internally for IRQ 8 through IRQ 15
Real-TIme-Clock
EISA bus
EISA bus
EISA bus
Mouse on EISA bus
Coprocessor Error
EISA bus (Hard disk drive controller)
EISA bus
EISA bus (Serial Port 2)
EISA bus (Serial Port 1)
EISA bus (Parallel Port 2)
EISA bus and floppy disk controller
EISA bus (Parallel Port 1)