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These cables are to connect a VMUX video switcher (rev. B) to an IBM PC or similar type computer's parallel port. This is a special cable and does not have the same pinouts as any industry standard computer cable. There are two types of cable described here. The first one is the normal cable to connect a single VMUX switcher to a computer. The second one is to connect up to seven VMUX switchers to a computer. For 2 through 6 switchers use the chart for 7 switchers but drop off columns on the right depending on how many switchers you have.
For Single VMUX Switcher
| PC / Clone Parallel Port |
Signal Name |
VMUX Switcher |
| 1 |
Strobe |
7 |
| 2 |
D0 |
3 |
| 3 |
D1 |
4 |
| 11 |
Busy |
9 |
| 19 |
GND |
1 |
| 12 & 21 jumpered together |
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For Seven VMUX Switchers
| PC / Clone Parallel Port |
VMUX #1 |
VMUX #2 |
VMUX #3 |
VMUX #4 |
VMUX #5 |
VMUX #6 |
VMUX #7 |
| 1 |
7 |
7 |
7 |
7 |
7 |
7 |
7 |
| 2 |
3 |
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| 3 |
4 |
4 |
4 |
4 |
4 |
4 |
4 |
| 4 |
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3 |
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| 5 |
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3 |
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| 6 |
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3 |
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| 7 |
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3 |
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| 8 |
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3 |
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| 9 |
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3 |
| 11 |
9 |
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| 19 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
| 12 & 21 jumpered together |
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