MB PRO
From Vogons Wiki
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? |
