this guy thinks it is
http://houston.craigslist.org/sys/1649349936.html

edit:

"NOTE: The original MusicQuest MQX-32 offered two independent MIDI busses, but the second bus (as well as SMPTE support) was disabled in Uart mode, and that's the mode that most all software runs an MPU-401 compatible in, including Windows software and MPU-401 drivers. MusicQuest also released the MQX-32M (which had 2 independent MIDI inputs) in 1989. A few months later in April 1989, MusicQuest, realizing that most software was running MPU-401 compatibles in Uart mode, redesigned the MQX-32 and MQX-32M to allow the second MIDI bus and SMPTE features to be used in Uart mode. I'm not sure of the firmware version that offered these changes, but the important thing to note is that the MQX-32M that you buy today (the MQX-32 has been discontinued) offers multiple busses and SMPTE under Windows."

wow that thing has 2 Z80 cpus.... 1 per midi bus I assume?

Wow, our first home computer had a Z80 for its CPU, and the original Nintendo Gameboy used a similar chip for its CPU. That thing must not have been cheap.

Z8 != Z80

That would make more sense then :p

So even if the 2nd bus is disabled in UART mode, the MPU-401 compatibility is maintained by the first bus?

anyone have one of these for sale?

Dude... Bringing up old threads is considered bad manners here, and this discussion is over 5 years old. VOGONS is not a marketplace either, offers to buy or sell aren't allowed. Vintage Computer and Amibay are a couple good trading sites, better look for it there.

There were multiple threads necro bumped. Not only were the posts of a WTB nature, but they also insulted those who owned an MQX-32m and used them only to play games, as if we were not entitled to have them.

Warning sent. Thread locked.