Positive Edge
Detect Register Port
1/3
The Positive Edge Detect Register for Port 1/3 (base + 24h) is read only. If bit 4 of the Control/Status Register is low ("0"), Port 1 data is accessed. If bit 4 is high ("1"), Port 3 data will be accessed. The operation of the Positive Edge Detect Register for Port 1/3 is identical to those of Port 0/2.
Positive Edge Detect Register Port 1/3 (Channels
b + 24h | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
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Read | Ch31 | Ch30 | Ch29 | Ch28 | Ch27 | Ch26 | Ch25 | Ch24 | Ch23 | Ch22 | Ch21 | Ch20 | Ch19 | Ch18 | Ch17 | Ch16 |
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Read | Ch63 | Ch62 | Ch61 | Ch60 | Ch59 | Ch58 | Ch57 | Ch56 | Ch55 | Ch54 | Ch53 | Ch52 | Ch51 | Ch50 | Ch49 | Ch48 |
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Negative Edge
Detect Register Port
1/3
For Positive/Negative Edge Detect and Mask Registers, channels 16 through 31 are accessed when BS = 0 in the Status/Control Register.
For Positive/Negative Edge Detect and Mask Registers, channels 48 through 63 are accessed when BS = 1 in the Status/Control Register.
The Negative Edge Detect Register for Port 1/3 (base + 26h) is read only. If bit 4 of the Control/Status Register is low ("0"), Port 1 data is accessed. If bit 4 is high ("1"), Port 3 data will be accessed. The operation of the Negative Edge Detect Register for Port 1/3 is identical to those of Port 0/2.
Negative Edge Detect Register Port 1/3 (Channels
b + 26h | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
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Read | Ch31 | Ch30 | Ch29 | Ch28 | Ch27 | Ch26 | Ch25 | Ch24 | Ch23 | Ch22 | Ch21 | Ch20 | Ch19 | Ch18 | Ch17 | Ch16 |
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Read | Ch63 | Ch62 | Ch61 | Ch60 | Ch59 | Ch58 | Ch57 | Ch56 | Ch55 | Ch54 | Ch53 | Ch52 | Ch51 | Ch50 | Ch49 | Ch48 |
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Positive Mask Register Port 1/3
The Positive Mask Register for Port 1/3 (base + 28h) can be read or written. If bit 4 of the Control/Status Register is low ("0"), Port 1 data is accessed. If bit 4 is high ("1"), Port 3 data will be accessed. The operation of the Positive Mask Register for Port 1/3 is identical to those of Port 0/2.
Positive Mask Register Port 1/3 (Channels
b + 28h | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
Read/Write | Ch31 | Ch30 | Ch29 | Ch28 | Ch27 | Ch26 | Ch25 | Ch24 | Ch23 | Ch22 | Ch21 | Ch20 | Ch19 | Ch18 | Ch17 | Ch16 |
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Read/Write | Ch63 | Ch62 | Ch61 | Ch60 | Ch59 | Ch58 | Ch57 | Ch56 | Ch55 | Ch54 | Ch53 | Ch52 | Ch51 | Ch50 | Ch49 | Ch48 |
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88 HP E1459A Register Definitions