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i have the base computer and key board controller where could i sell it

The CX5M was my first computer and it served it''s purpose well. I used the music composition software cart and also a DX7 librarian with it. I saved to data cassette tape until I added the floppy drive for $200. I also added the MIDI keyboard which at that time was limited to note on/off and velocity only.
It drew me into electronic music in such a way that I hope new technology like the Raspberry Pi will do for my children. I ended up gifting it to the Sound Department at Columbia College, Chicago in 1994. I wish I had it back now for my kids!

I bought cx5m in 1985,recorded on 2 albums, few singles, played live at Atonal festival, Berlin 1986 using it. I loved it, especially the voice editing program.

I have an upgraded version of this machine, the CX5M2/128. I have upgraded it to MSX2, which is a very simple procedure. It is the example of a "low end" MSX in my computer museum. The high end spot is filled by a Panasonic FS-A1ST MSX TurboR upgraded to 512k. I have to say that the MSX machines were quite impressive. I own many rare and unusual Japanese computers, but the TurboR holds a place in my heart, it has a charm to it that I can''t quite explain, but it''s a truly amazing system!

..... and the FB-01 sound module (a DX-7 in a box). It was more like a DX-9 in i box

..... and the FB-01 sound module (a DX-7 in a box). It was more like a DX-9 in i box

I have used both MSX and this computer, but I Just wanted to share an observation. The model number is CX5M. The way the 5 is written on the system, it almost looks like as if it hints that it is an MSX system. M5X. The "C" at the end makes the whole thing look like as if it''s saying "MSX see?". Maybe this wasn''t the intention, but I couldn''t help but think of this model number this way.

The technical info speaks of a built-in PSU, but my CX5M had a huge brick of an external PSU that connected to the computer using a custom connector with multiple pins for the different voltages.

By the way: Early versions of the internal sound module had a MIDI-IN port that was unusable. Only later versions of the CX5M sound modules allowed to be controlled as MIDI slaves with an external master-keyboard or sequencer.

I believe you are correct, James. I have done extensive research on this and believe this to be the only MSX computer actually released in any notable quantity in the US, and in reality this was not marketed as a traditional computer anyway. Many sources claim that Spectravideo released the 728 here, but from all that I've found, this was not the case. I believe the expected MSX revolution never happened in the US because the Commodore 64 came to squeeze and dominate the low end market, causing the quick demise of most second-tier competitors.

I personally own a CX5M with the improved MIDI capabilities. Right now, it's my only MSX 1 system, but I have a Japanese Sony MSX 2 system.

there's à new version of the cx5m.... the cx5m II (with a best synthesis card)

Correct me if I'm wrong, but I think this was the only MSX computer marketed in the United States. In theory, the Spectravideo was also available... but I sure never saw one.