Correct. See item #12 in the database FAQ.
John added the MIDI circuitry to the LCD PCB so it would support the
Synthmodules PSIM module, providing both MIDI and display capability.
I added a separate mode in the firmware for a MIDI monitor. The
wires shown on the schematic connect the MIDI input circuitry to the
processor and ground a control pin that forces MIDI monitor mode.
Note that to display the hex data stream takes three character
positions so with only a 32 character LCD you can display the last
11 bytes.
I have used this to decode some of my synths to figure out exactly
what continuous controller messages are used, what power-up
initialization sequences are sent, and when and if the synth uses
running status.
Note that if your MIDI data stream uses MIDI clock or active sense,
the display will be worthless since these streams will dominate the
display. Sysex dumps are equally worthless since you can only see
11 bytes of data.
Dave
--- In
ComputerVoltageSources@yahoogroups.com, "clickmrmike"
<mrmike@...> wrote:
>
> The schematic for the LCD implies that it can be a stand-alone MIDI
> monitor; that is, it does not require the CVS PCB for this
function.
> Am I correct?
>
> Thanks,
> mrmike
>