User manual

2-6 Chapter 2: Hardware Installation
Echo User's Manual, ver. 0.00
Many other devices such as the keyboard and disk drives also
require an IRQ. Table 3 shows some typical IRQ assignments.
Table 3: Typical IRQ assignments
IRQ Device
0 Timer output
1 Keyboard
2 Reserved
3 COM2, COM4, SDLC
4 COM1, COM3, SDLC
5 Unassigned (typically)
6 Floppy disk controller
7 LPT1
8 Real-time clock
9 Reserved
10 Unassigned (typically)
11 Unassigned (typically)
12 Unassigned (typically)
13 Co-processor
14 Primary fixed disk controller
15 Secondary fixed disk controller
In most cases the default IRQ setting for your Echo adapter is
satisfactory. If an IRQ conflict exists between the Echo adapter
and another expansion device, you must choose another IRQ. To
select an IRQ simply install the jumper across the corresponding
pins for that IRQ on J1.