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MB PRO

2022-08-12T23:19:11Z

Grep: Updated info about AC'97 mod

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:

{|class="wikitable"
| 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:<ref><s>[http://support.creative.com/kb/ShowArticle.aspx?sid=3026 Creative Labs - Pin Assignment of I/O Jacks and Connectors on Sound Blaster Devices]</s> Link dead, need archived mirror</ref>

{|class="wikitable"
! Pin !! Purpose
|-
| 1 || Audio GND
|-
| 2 || Key, no pin
|-
| 3 || Line-in
|-
| 4 || Audio GND
|-
| 5 || Line out left
|-
| 6 || Audio GND
|-
| 7 || Line out right
|-
| 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?'''
|}

== AC'97 mod ==
It is possible to connect AC'97 front panel pins to a MB_PRO header, although it's still a work in progress.

{|class="wikitable"
! AC'97 pin !! Sound card MB_PRO pin !! Purpose
|-
| 5 || 7 || Line out right
|-
| 2 || 6 || Line out right GND
|-
| 9 || 5 || Line out left
|-
| 2 || 4 || Line out left GND
|}

For now it seems that all ground must go to pin 2 on AC'97 side. Some pinouts say that pins 4, 6 and 10 are ground, but that is demonstrably untrue. Those pins are for plug detection of associated pins.
Microphone seems to be located on pin 10 on MBPRO side of things and should go to pin 1 on AC'97, but it's quite possible that auxilary power will be required for pin 3 on AC'97.

== 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 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.

== References ==
<references/>

MB PRO

2022-07-19T21:46:42Z

Grep: Line outs on MB_PRO confirmed personally. Also, tried out building an AC'97 mod. Also the only reference in the article is dead

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:

{|class="wikitable"
| 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:<ref><s>[http://support.creative.com/kb/ShowArticle.aspx?sid=3026 Creative Labs - Pin Assignment of I/O Jacks and Connectors on Sound Blaster Devices]</s> Link dead, need archived mirror</ref>

{|class="wikitable"
! Pin !! Purpose
|-
| 1 || Audio GND
|-
| 2 || Key, no pin
|-
| 3 || Line-in
|-
| 4 || Audio GND
|-
| 5 || Line out left
|-
| 6 || Audio GND
|-
| 7 || Line out right
|-
| 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?'''
|}

== AC'97 mod ==
It is possible to connect AC'97 front panel pins to a MB_PRO header, although it's still a work in progress.

{|class="wikitable"
! AC'97 pin !! Sound card MB_PRO pin !! Purpose
|-
| 5 || 7 || Line out right
|-
| 6 || 6 || Line out right GND
|-
| 9 || 5 || Line out left
|-
| 10 || 4 || Line out left GND
|}

Maybe in the future, this table might get a microphone update if it's even possible. AC'97 lists a thing called "microphone power" and that seems nowhere to be found on MB_PRO.

'''NOTE: If you connect it like this, the line out coming through the MB_PRO header will be orders of magnitude quieter.'''

== 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 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.

== References ==
<references/>