On 7 Jan 2003, Jeffrey H. Ingber wrote:
  Just to clarify some items (ie. MT-32):
 The three original PC interfaces from Roland are as follows:
 MPU-IPC: 8-bit ISA card that connects to a beige, external breakout box
 via. 25-pin D-sub connector.  Has MIDI IN, OUT, and through as well as a
 metronome conenctor. 
And you need to connect an external module to the MIDI i/o ports, which is
what you use an MT-32 for, right?
  MPU-IMC: Microchannel version of the above card.
Oooh.  I would *love* to have this.  Is it made of unobtanium?
  An MPU-IPC/IMC and MT-32 setup is functionally
equivilent to the LAPC-1
 with a breakout box, although the breakout box is optional on the LAPC-1
 (it is not needed to produce music since the MT-32 is integrated into
 the card itself). 
Was there a MCA version?
Peace...  Sridhar