MB PRO: Difference between revisions
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Malvineous (talk | contribs) (Clarify modem speaker input) |
Malvineous (talk | contribs) (Document TAD -> MB_PRO adapter cable) |
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| 10 || Microphone in '''Isn't this mic out for the modem?''' | | 10 || Microphone in '''Isn't this mic out for the modem?''' | ||
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== TAD conversion == | |||
Some sound cards have an '''MB_PRO''' connector but no [[TAD]] connector. A cable can be made to allow internal modems with a TAD socket to be hooked up to the MB_PRO connector: | |||
{|class="wikitable" | |||
! Modem<br/>TAD pin !! Sound card<br/>MB_PRO pin !! Purpose | |||
|- | |||
| 1 || 8 || Phone line audio, from modem to sound card. | |||
|- | |||
| 2 || 6 || GND | |||
|- | |||
| 3 || 9 || GND | |||
|- | |||
| 4 || 10 || Microphone audio, from sound card to modem. | |||
|} | |||
TAD pins 2 and 3 can also be patched to any of the other GND signals on the MB_PRO connector if that is more convenient. The two in the above table are just one possibility. | |||
== References == | == References == | ||
<references/> | <references/> | ||
Revision as of 19:58, 12 March 2017
The MB_PRO connector is used to connect a Sound Blaster card to a Modem Blaster card. The signals can also be re-purposed for other uses.
The pin arrangement is as follows:
| 9 | 7 | 5 | 3 | 1 |
| 10 | 8 | 6 | 4 | N/C |
The purpose of the pins, from the point of view of the sound card, are:[1]
| Pin | Purpose |
|---|---|
| 1 | Audio GND |
| 2 | Key, no pin |
| 3 | Line-in |
| 4 | Audio GND |
| 5 | Line left TODO: Is this line out? |
| 6 | Audio GND |
| 7 | Line right (out?) |
| 8 | Modem speaker input. On a sound card, this input receives a line-level audio signal from the modem. |
| 9 | Audio GND |
| 10 | Microphone in Isn't this mic out for the modem? |
TAD conversion
Some sound cards have an MB_PRO connector but no TAD connector. A cable can be made to allow internal modems with a TAD socket to be hooked up to the MB_PRO connector:
| Modem TAD pin |
Sound card MB_PRO pin |
Purpose |
|---|---|---|
| 1 | 8 | Phone line audio, from modem to sound card. |
| 2 | 6 | GND |
| 3 | 9 | GND |
| 4 | 10 | Microphone audio, from sound card to modem. |
TAD pins 2 and 3 can also be patched to any of the other GND signals on the MB_PRO connector if that is more convenient. The two in the above table are just one possibility.