Bit Mode Configuration
VCM-DAS-3 Reference Manual
15
Figure 7. Base Address Jumpers
Bit Mode Configuration
The VCM-DAS-3 can operate using 8-bit or16-bit ISA transactions. For compatibility with 8-bit
ISA buses, you must set the VCM-DAS-3 to use 8-bit ISA transactions.
Jumper V1[15-16] selects the bit mode. When a jumper is present, the board will operate on
either 16-bit or 8-bit ISA bus. When the jumper is removed, the board is forced to perform only
8-bit ISA transactions. The default setting is jumper installed.
9
10
11
12
0
5
2
6
0
2
1
3
C
E
D
F
4
A
9
B
1
7
3
8
1
2
3
4
5
6
7
8
The lower digit is
always 0.
Upper
Digit
Middle
Digit
Lower
Digit
0x340 Example:
1
2
3
4
5
6
7
8
9
10
11
12
