MB PRO
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Revision as of 20:58, 12 March 2017 by Malvineous (Talk | contribs) (Document TAD -> MB_PRO adapter cable)
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.
