Waveblaster dougterboard connector
Waveblaster connector is a special connector for connecting Waveblaster doughterboard to some of the Soundblaster cards. Waveblaster doughterboard provides improved MIDI sounds.
1 Ground 2 NC 3 Ground 4 MIDI IN 5 Ground 6 +5V 7 Ground 8 NC 9 Ground 10 +5V 11 Ground 12 NC 13 NC 14 +5V 15 Ground 16 NC 17 Ground 18 +12V 19 Ground 20 Right Audio Out 21 Ground 22 -12V 23 Ground 24 Left Audio Out 25 Ground 26 Reset (logic low)
Pinout used in CMI3880 soundcard
This pinout is shown in CMI3880 circuit diagram by C-media electronics:
Pinout info from Elektor Electronics
Elector Electronics has published an article how to use a Yamaha BX50XG doughterboard as stand-alone MIDI controlled soundcard in their July/August 1997 issue pages 96-97.
The pinout of the doughterboard shown in the schematic seems to be different from the one above (it uses different pin numbering, no other differences). Here is how the pins are used in schematic:
Pin Function Pin Function 1 not connected in circuit 2 Ground 3 MIDI IN (data to the doughterboard) 4 Ground 5 +5V to board 6 Ground 7 not connected in circuit 8 Ground 9 +5V to board 10 Ground 11 not connected in circuit 12 Ground 13 +5V to board 14 not connected in circuit 15 not connected in circuit 16 Ground 17 +12V to board 18 Ground 19 Right audio output from board 20 Ground 21 -12V to board 22 Ground 23 Left audio output from board 24 Ground 25 Reset signal to board (logic low resets) 26 Ground
The MIDI input of the dougterboard was connected in the circuit to either the soundcard TTL level MIDI signal output in joystick port (pin 12 in joystick connector) or real MIDI signal receiver circuitry.
Accoring an E-mail comment I received the pinout numbering in this schematic is not right :-(
Pinout info posted to Usenet News many times
This waveblaster connector pinout has been posted to usenet news many times. According the comments I have received this pinout is not correct one. So this is not the correct pinout and do not use this wrong one:
Pin Definition Pin Definition 1 Digital GND 14 Digital VCC 2 Not Used 15 Chassis GND 3 Digital GND 16 Not Used 4 MIDI Output (TTL) 17 Mixer Out Left 5 Digital GND 18 +12 V Analog 6 Digital VCC 19 Chassis GND 7 Digital GND 20 Left Audio Out 8 MIDI Input (TTL) 21 Mixer Out Right 9 Digital GND 22 -12 V Analog 10 Digital VCC 23 Chassis GND 11 Digital GND 24 Audio Out Right 12 Not Used 25 Analog GND 13 Not Used 26 Reset
SourceUsenet news articles posted to comp.sys.ibm.pc.soundcard.tech newsgroups by Hallgeir Lied (firstname.lastname@example.org), Bjorgum Gunnar (email@example.com) and Rick Koch (Rick_Koch@BayNetworks.com). According some comments I have received this pinout is not the right one but this is the one which is posted to many usenet newsgroups many times.
Tomi Engdahl <Tomi.Engdahl@iki.fi>