Advantech PCM-4862 Manual page 38

I/O address (HEX)
2C0-2C4
240-244
280-284
200-204*
= Open = Closed
Jumpers J27 (9-10, 11-12) control the DOS drive emulated by the
Flash/ROM disk as 1st, 2nd, 3rd or 4th as shown below:
Drive
1st
2nd
3rd*
4th
= Open = Closed
The actual drive letter assigned by DOS to the Flash/ROM disk
depends on the floppy or hard disks installed in the system and the
DOS version.
30 PCM-4862 User's Manual
1, 2
* = Default
3rd Drive (default)
10 12
9 11
J27
9, 10
* = Default
3, 4
11, 12