lcbrink@rodan.acs.syr.edu (Lee C. Brink) (07/21/90)
The subject says it all. I have the following system:
Amiga 2500/20
Workbench 1.3
2 Internal 3 1/2" drives
ECE MIDI Interface (W/Pass-thru)
Roland D-10 Synth
Bars & Pipes Sequencer
Now for the problem: There is no output on the midi lines. The software,
synth, and interface works fine straight out of the box on an Amiga 500
with Workbench/ROM 1.3, but on my 2500 there is no output whatsoever on
the midi cables (Checked with a MIDI tester). I have tried new CIA's,
removing the 2620 board, removing the 2090a (Throwing it out a window :-)
but with no success. Now here's the kicker - My modem works fine plugged
into the pass-thru of the MIDI interface. Does anyone have any clue
as to reasons for MIDI not working?dormer@cs.purdue.EDU (John Dormer) (07/21/90)
Are you sure that you aren't doing something >really< simple like switching the switch that controls passthru/MIDI? My Dr. T's has a big, white button on its front to change between sending signals out the back (rs232 passthru) or out to the MIDI bus. I've forgotten to switch it back quite a few times after a long session of telecom, only to confuse my modem into submission with all those MIDI packets ;) John Dormer BIX: j.dormer Internet: dormer@medusa.cs.purdue.edu
lcbrink@rodan.acs.syr.edu (Lee C. Brink) (07/22/90)
In article <11176@medusa.cs.purdue.edu> dormer@cs.purdue.edu (John Dormer) writes: > >Are you sure that you aren't doing something >really< simple like switching >the switch that controls passthru/MIDI? My Dr. T's has a big, white button >on its front to change between sending signals out the back (rs232 passthru) >or out to the MIDI bus. I've forgotten to switch it back quite a few times >after a long session of telecom, only to confuse my modem into submission >with all those MIDI packets ;) > I have made sure (As well as some others who have watched) that the button is in the right position. Unfortunately it doesn't seem that a mere button in the wrong position is the problem. To all who have sent mail - Thanks for the suggestions on checking the power on the serial port (I'll check that in a day or so when I have access to the necessary tools) but the interface does work. It has been tried on an Amiga 500 and it worked fine. I have had the serial port itself replaced due to a bent pin (Pin 2 to be exact) but otherwise there have been no problems. (A side note - When the 2500-ECE-D10 setup was tested with a midi tester [For lack of a better or technical name] there was NOTHING. Not even power. The 500-ECE-D10 setup showed full operation.)
terry@comcon.UUCP (Terry LaGrone) (07/24/90)
In article <3976@rodan.acs.syr.edu>, lcbrink@rodan.acs.syr.edu (Lee C. Brink) writes: > > > Now for the problem: There is no output on the midi lines. The software, > synth, and interface works fine straight out of the box on an Amiga 500 > with Workbench/ROM 1.3, but on my 2500 there is no output whatsoever on > the midi cables (Checked with a MIDI tester). I have tried new CIA's, > removing the 2620 board, removing the 2090a (Throwing it out a window :-) > but with no success. Now here's the kicker - My modem works fine plugged > into the pass-thru of the MIDI interface. Does anyone have any clue > as to reasons for MIDI not working? I had a similar problem and traced it to a "weak" RS-232 driver chip. Try some other midi software first, surprisingly, a weak chip causes some software to break on MIDI, but not all. DMCS worked with the weak chip. Replacing that chip cured all ills. If you are a tech, place scope leads on input and output of RS-232 driver to verify. Terry LaGrone "Mixing audio, video and ideas"\