25 Pin Connector located on the motherboard  audio / jpystick - Page 1
Forum section: electronics / repair

author: GGMM
author_rank: Frequent Contributor
timestamp: April 03, 2025, 06:56:56 am
content: Hello,Do you know where I can find this type of audio adapter/ joystick. (It's for my old ATC 7110M motherboard)This starts from a 25 points flat cable and goes on a DB joystick and 3 audio jacks.I did not find on the sites at low prices , style Ali...I can make one as described, but if I find one for a few euros, it’s bettersee here:https://retrocomputing.stackexchange.com/questions/25069/25-pin-sound-game-ribbon-cableI think to weld a little better lolcdt

author: darkspr1te
author_rank: Frequent Contributor
timestamp: April 03, 2025, 08:12:17 am
content: I found one in my junk box, i can do a pin-out if you decide to make your own.darkspr1te

author: GGMM
author_rank: Frequent Contributor
timestamp: April 03, 2025, 10:14:40 am
content: Hello darkspr1teThank you for your replyIf you want to make a diagram, then yes.This will help in the construction, especially the audio part.thank you againcdt

author: timeandfrequency
author_rank: Frequent Contributor
timestamp: April 03, 2025, 10:17:01 am
content: Hello GGMM,Those similar but not identical models are easy to find :https://www.ebay.com/itm/226150745766https://www.ebay.com/itm/255275438290A bit of modding is required : attach a2x13 female ribbon connectoron the flat cable, by using the pinout information that darkspr1te can provide.

author: darkspr1te
author_rank: Frequent Contributor
timestamp: April 03, 2025, 12:08:18 pm
content: 15 pin D Sub1 2 --------------------1------------------------93 4 --------------------2------------------------105 6 ----------------------3------------------------117 8 ----------------------4------------------------129 10 ---------------------5------------------------1311 12----------------------6------------------------1413 14----------------------7------------------------1515 16----------------------8---- n/c17 18 ----L Out----------R Out19 20 ---- Gnd---------- GND21 22 ---- L MIC----------- R Mic23 24 ----- n/c-----------L Line in25 26 ------ R Line in------------ GND

author: GGMM
author_rank: Frequent Contributor
timestamp: April 03, 2025, 02:57:55 pm
content: hello,Thank you for your answersI carefully keep the schematiccdt

author: GGMM
author_rank: Frequent Contributor
timestamp: April 04, 2025, 03:05:34 pm
content: hello,I had a stroke of luck, I found an adapter on an ad site. 3 € + shipping costs.So no waste of time to desweld/ solder, etc...happycdt

author: timeandfrequency
author_rank: Frequent Contributor
timestamp: April 04, 2025, 03:58:12 pm
content: Great

author: darkspr1te
author_rank: Frequent Contributor
timestamp: April 04, 2025, 08:40:59 pm
content: that looks like the 15/9 cable not the 26(2 cut) pinned one,am only going by the shadow of the ide side though.

author: GGMM
author_rank: Frequent Contributor
timestamp: April 05, 2025, 06:58:31 am
content: Darkspr1te,Yes, I saw that.The important thing is that the slot is equipped with audio jacks and joystick.It would have been hard work to drill holes, buy jacks, etc (+ more expansive...lol)I have a tablecloth 26 points, so either I cut and weld.But, I think we can grind the plugs on one side and this should fit by removing a pin from the connector of the motherboard.cdt

author: GGMM
author_rank: Frequent Contributor
timestamp: April 15, 2025, 03:07:32 pm
content: hi Darkspr1te,Did I understandI’m rewiring the wireplease confirmit’s silly, but I’d rather confirmexamples:....15 pin D Sub1 2 --------------------1------------------------9So pin 1 go to pin 9 of 15 pins connectorso pin 2 go to pin 1 of 15 pins connector25 26 ------ R Line in------------ GNDpin 25 is GNDpin 26 is R line in.cdt

author: darkspr1te
author_rank: Frequent Contributor
timestamp: April 16, 2025, 05:55:55 am
content: Correct

author: GGMM
author_rank: Frequent Contributor
timestamp: April 19, 2025, 03:07:02 pm
content: DarkSpr1te,Are you sure about your statement on the audio part?When I look at these pictures on sitehttps://retrocomputing.stackexchange.com/questions/25069/25-pin-sound-game-ribbon-cableI don’t think I find the same connections.Cable pin 23 would not be used. And connectors line in / out inversed?Unless my sight betrays me?Stragecdt

author: darkspr1te
author_rank: Frequent Contributor
timestamp: April 20, 2025, 07:33:25 am
content: I have attached a picture from the mobo manuali may have swapped a pin, prob my brain going between pin side or receptacle sidedarkspr1te

author: GGMM
author_rank: Frequent Contributor
timestamp: April 20, 2025, 09:08:26 am
content: Hello DarkSpr1te,Thank you for your schematic.Strange all these connections.As if there were different versions of cables.I will at least test the ground of the connector of my motherboard.impossible to find the schematic of this connector for ATC 7110Mthe sound chips seem to be a FM801 and stack 9704I have to track connections ?cdt

author: GGMM
author_rank: Frequent Contributor
timestamp: April 22, 2025, 04:34:23 pm
content: hi, DarkSpr1te,This connector is a real pain.I tested the pins on the ohmmeter, then on the oscilloscope the voltages and outputs by activating a sound from the control panelthe result:Pins 3 7 17 19 4 8 seem to be connected to ground.Pins 1 11 13 23 25 12 22 give 5v on the oscilloscopePins 9 10 give a signal with playing a sound.Pins 5 15 21 2 6 14 16 18 20 24 26 not 5v, not ground. dont know at this time.As if the take was upside down, but not everything matches.It will be necessary to follow from then the chips, but there are capacitors that necessarily cuts the contuinityI read that this type of connector is not necessarily standard and can be different from one motherboard manufacturer to another.Any idea is welcome. A real schematic for this board. lolcdt

author: GGMM
author_rank: Frequent Contributor
timestamp: April 23, 2025, 04:58:42 pm
content: hi DarkSpr1te,It is not clear the positioning of this connector 26 points.for example, between the documentation of PCChips and screen printing, we have the opposite.the reverse would be 11 and not 15Good, after you can tell me, the serigraphy is misplaced.LOLIn any case the line output reinforces my positions after my tests.cdt

author: darkspr1te
author_rank: Frequent Contributor
timestamp: April 25, 2025, 10:46:52 am
content: Hope this helps*edit: updated picture for clarity**edit 2, i've noticed a difference between picture and my probing + more study in doing the update diagram, let me confirm tomorrow but it's the gnd left(ring) swap on line in/ mic thats not on my probing or diagram i drew on paperi think i have another one with the colours as mine is all black so will hunt that down tomorrow and probe that to see if it's different

author: GGMM
author_rank: Frequent Contributor
timestamp: April 26, 2025, 10:13:47 am
content: Hello DarkSpr1te,Thank you for your efforts.The connector on the ATC board, has no misleading pin. The 26 pins are presents.The connection may seem identical, but it is not.I don’t think there was necessarily a standard at that time.I must continue to probe the connections.I will give a picture and explanations afterwardsMy first tests show an audio output in 9, 10 or 17, 18 if we consider the reverse connector of direction.cdt

author: GGMM
author_rank: Frequent Contributor
timestamp: April 26, 2025, 10:18:42 am
content: Look hereit's like the connector is inversed

author: GGMM
author_rank: Frequent Contributor
timestamp: April 27, 2025, 04:29:36 pm
content: Hello,Here is the result of the connectivity testThis connector is specific to the A-Trend 7110M boardThe audio part remains to be seen (pin 1 to 10) and pin it 26cdt

author: GGMM
author_rank: Frequent Contributor
timestamp: May 03, 2025, 03:58:21 pm
content: DarkSpr1te,This is the arrangement of pins on the sound/ game connector of the A-Trend 7110M motherboard.If that can be useful, because there is nothing on the net.It is different from what we can do.Note that the microphone input is mono, but gives an output on the LIN OUT L and R jacks. The LIN IN L and R also work very well and stereo.I tested with a generator.It will simply make a small adaptation on the microphone input jack to mix the signals and switch from stereo to mono. (I think just put 2 resistors)Only the ribbon to do....cdt