VOGONS


First post, by retrodevices

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Hello everybody. I am looking for the AdMOS QS1000 datasheet to figure out which pins are the audio output from the QS1000 chip. The sound card is an OPTi 931 noname ISA card that works except for the MIDI part. I tried to increase the volume of all possible mux channels with the UNISOUND utility but still no MIDI sound. Tried original OPTi931 drivers with the same result. With an oscilloscope I verified that the 24MHz crystal clock on the QS1000 is generated and the wavetable ROM is accessed according to the sound played with DOSMID. I'd like to see with the scope if there is an audio output generated by the QS1000 but have no idea at which pins to attach the probe? Any advice is welcome. If there is no audio signal output I'd assume that the QS1000 is defective unless you have other ideas?

Reply 1 of 2, by dominusprog

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I don't believe UniSound supports MIDI. Install the OPTi driver and edit the SOUND16.CFG and set FDAC_SRC to SHARE.

Driver
http://www.vogonsdrivers.com/getfile.php?fileid=628

https://www.alldatasheet.com/view.jsp?Searchw … =QS1000%20ADMOS

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Reply 2 of 2, by retrodevices

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Yes, thank you! The editing of the SOUND16.CFG as you suggested enables the onboard AdMOS. Also MIX stetting there works apart from SHARE. The UNISOUND 0.80a not only fails to enable but if run after SNDINIT again disables the MIDI channel.

Just wondering if there is a QS1003 ROM dump available somewhere?