
Chapter 3 - Installing Instrument Boards
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3. Set the address mask.
Since there is no change in A4 and A10-A12, the default
address mask does not need changing, even though A10-A12
can be set to zero.. Thus the final SW2 and SW1 settings are:
Figure 3-9: Example 1 address switches
Example 2: Multiple address ranges and an offset
This example uses base ranges of 310H-313H, with internal address
ranges of 710-713H, B10-B13, F10-F13H, and 1310-1313H and an
offset of C000H.
1. Set the base address.
The base addresses of 310H through 313H in binary become
11,0001,0000 through 11,0001,0011. This translates in settings
of (remember that A0-A3 are ignored):
A15 A14 A13 A12 A11 A10 A9 A8 A7 A6 A5 A4
0 0 0 0
0 0 1 1
0 0 0 1
The internal addresses of 710H through 713H in binary become
111,0001,0000 through 0111,0001,0011. This translates in
settings of (remember that A0-A3 are ignored):
A15 A14 A13 A12 A11 A10 A9 A8 A7 A6 A5 A4
0 0 0 0
0 1 1 1
0 0 0 1
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