User manual

3-22 Chapter 3: Software Installation – SCO Unix
Echo User's Manual, ver. 0.00
Figure 13: SCO Unix: IRQ settings
A
B
3 4 5 7 10 11 12 15
IRQ
J1
Note: All ports are interrupting on channel A, IRQ 10
Step 2
You now must make an entry for the Echo adapter in the file
space.c. This entry tells the operating system about the Echo
adapter:
1. Change to
/etc/conf/pack.d/sio directory and backup the file
space.c.
2. Open the file
space.c with your editor. You will find listings
for many different serial adapters so search the list until you
find an entry for a Stargate adapter. The Stargate entries are
essentially compatible with the Echo adapter. This entry
should look like the following:
{2,STARGATE,8,4,8,(sd)0x280,0x280+STAR_POLL,8,
MCRBIT3},/*AT-Stargate*/
We can describe the parameters for this entry as follows:
{[COM #],[Board type],[# of ports],[IRQ],
[Minor #],[Port address],[Status port address],
[Bus width],[Modem control register]}
[Device description]