JVC MSX MIDI Interface

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By o.geerdink

Hero (526)

o.geerdink's picture

19-11-2015, 10:21

I got it, but no software. The seller thought it was for Amstrad. The producer did make midi software for zx spectrum and amstrad which can be foud but not the msx version.

By Grauw

Ascended (8202)

Grauw's picture

19-11-2015, 14:28

Got a link to the Spectrum and Amstrad software? If the hardware is really the same it may help me figure out the chipset used. (I assume you don’t want to try to open yours up? Smile)

By o.geerdink

Hero (526)

o.geerdink's picture

19-11-2015, 18:51

http://www.zxspectrumreviews.co.uk/Search.aspx?pub=1261

Er is vrij veel te vinden, volgens mij heet de maker "Electro Music Research" en niet "Electro Musical Research" zoals op generation-msx staat.

Dit is hun oude adres:

Le Computer (EMR Sales Dept)
Main Road
Willows Green
Chelmsford
Essex
CM3 1QB

Tel Sales and Enquiries : 01245 362225
Fax : 01245 362048
Technical Helpline : 0860 382242 (4-6pm weekdays)

By o.geerdink

Hero (526)

o.geerdink's picture

19-11-2015, 18:52

Maybe the other system was BBC btw, I didn't find anything solid Sad

By Grauw

Ascended (8202)

Grauw's picture

12-05-2019, 01:19

http://mdfs.net/Info/Comp/BBC/MIDI/
http://mdfs.net/Info/Comp/BBC/MIDI/emr.gif

Looks like it’s based on the 6850 ACIA, like the Music Module.

By rderooy

Hero (551)

rderooy's picture

12-05-2019, 10:13

Well since Philips did not actually make the NMS1205 Music Module, it was made by Richard Watts Computers Ltd and Music Sales Ltd. as printed on the PCB. Perhaps there was some connection between them and EMR. Or it is just coincidence :-)

By Grauw

Ascended (8202)

Grauw's picture

12-05-2019, 15:59

Grauw wrote:
  • Pins on the cartridge’s edge connector: /INT, /IORQ, /WR, A0-A2, A4-A7, D0-D7, GND, CLOCK, +5V, SW1, SW2. This confirms that it is I/O based. Also A3 is missing so it probably uses 8 I/O ports, and another 8 mirrored. /RD is missing but maybe it infers it from the absence of /WR?

Where have I seen that kind of mirroring before? Big smile

By Manuel

Ascended (15541)

Manuel's picture

11-06-2019, 21:39

Grauw, did you ever find out more about it? I just read the article in MSX Computing and now I'm more interested Smile

By Grauw

Ascended (8202)

Grauw's picture

13-06-2019, 21:56

Well knowing that it’s the 6850 ACIA and the I/O range it should be pretty easy to get it to work with a few attempts. But I haven’t been working on any MIDI project recently so I haven’t been looking into that. Could try to adjust the Philips MIDI driver in Synthesix to work with this guy.

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