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Register Definitions
b + 00
15
16
Write
Read**
b + 02
15
16
Write
Read**
b + 04
15
16
Write*
Read**
b + 08
15
14
16
Write*
Read*
Appendix B
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HP E1368A/69A/70A Registers
All three Microwave Switch modules are register-based devices. See the
tables below for register definitions.
Manufacturer ID Register
14
13
12
11
10
*Returns FFFF
= Hewlett-Packard A16 only register-based.
16
Device Type Register
14
13
12
11
10
Status/Control Register
14
13
12
11
10
9
Manufacturer ID
*R = Switch reset to power-on state (all switches open)
**R = Status " busy" is true low in bit #7 (FF7F
Channel Enable Registers
13
12
11
10
9
Always Returns FFFF
9
8
7
6
5
4
Undefined
Manufacturer ID
9
8
7
6
5
4
Undefined
Manufacturer ID
8
7
6
5
4
Undefined
B
8
7
6
5
CH04 CH03 CH02 CH01 CH00
16
HP E1368A/69A/70A Registers 75
Appendix B
3
2
1
0
3
2
1
0
3
2
1
0
7F
16
)
16
4
3
2
1
0
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