HP E1563A, User Manual, Page: 114 / 166

114 HP E1563A and E1564A Register-Based Programming Appendix B
A16 Address Space
Outside the Command
Module
When the HP E1406A Command Module is not part of your VXIbus system
(Figure B-2), the digitizer’s base address is computed as:
1
C000
16
+ (LADDR * 64)
16
or
49,152 + (LADDR * 64)
where C000
16
(49,152) is the starting location of the register addresses,
LADDR is the digitizer’s logical address, and 64
10
is the number of address
bytes per VXI device. For example, the digitizer’s factory set logical address
is 40 (28
16
). If this address is not changed, the digitizer will have a base
address of:
C000
16
+ (40 * 64)
16
= C000
16
+ A00
16
= CA00
16
or (decimal)
49,152 + (40 * 64) = 49,152 + 2560 = 51,712
1. The “16” at the end of the address indicates a hexadecimal number.
Figure B-1. Registers within A16 Address Space