[sdiy] OT? MIDI to RS232 converter box?

[MTG]

Thanks, I'm not sure yet how things will go. It's a port of a 6809 
monitor that then became a 68HC11 one.  And now 6303 (6801-ish).

On 1/22/2018 1:13 PM, Gordonjcp wrote:
> On Sat, Jan 20, 2018 at 10:30:24AM -0800, MTG wrote:
>>
>> Reason: to run an old EPROM monitor in an old synth. The monitor
>> utilizes the existing physical layer of 5-pin DIN MIDI, but on the
>> host side the monitor is operated via a COM Port Terminal program
>> like TeraTerm.
> 
> I solved this problem in my implementation of Forth for the Mirage by
> using a plain ordinary USB MIDI cable, and writing a terminal that just
> talks to a MIDI port.
> 
> The only trouble is that USB MIDI expects "fully formed" messages, which
> is a bit of a bugger.  So, I used MIDI quarter frame messages to
> "encapsulate" the 7-bit ASCII, and adapted KEY and EMIT to handle this.
> 
> Now depending on what your EPROM monitor is, it might be easier just to
> bodge that into the ROM image and use the software I wrote.  I'm happy
> to lend a hand on this ;-)
>