[GUIDE] Direct MIDI IO for ST and Amiga Cores

[netizensmith]

Hi all,

When using my real Amiga 600 I had this config:

A600->Serial Midi Interface -> midi to USB cable
USB end plugged into a client port of a powered USB hub
Akai MPK Mini controller also plugged into a client port of USB hub
iPad pro connected to the hub using the host USB cable i.e. the iPad was the host.

This worked great!

Now on the Mister I can wire the Akai, ipad and hub together no problem but the problem is I now essentially have an Amiga with a USB type A host socket that I need to connect to a hub that also has a USB type A socket and I know that's something you can't do. Any ideas how to get this all talking together?

[Zarkov]

Should I disconnect the direct midi io box from legacypixels from the user port if I load cores other than ao486 etc? Any harm leaving it connected?

[mobith]

Should I disconnect the direct midi io box from legacypixels from the user port if I load cores other than ao486 etc? Any harm leaving it connected?

I haven't seen the schematic but I imagine there's a buffer and opto-isolator on the MIDI breakout board, so I doubt you can break it

[bnz99]

Just realized I have never posted my DIY midi pcb in this forum: https://github.com/bzeiss/mister-pcbs/wiki/Midi-PCB

[mobith]

Just realized I have never posted my DIY midi pcb in this forum: https://github.com/bzeiss/mister-pcbs/wiki/Midi-PCB

Ah nice - you made one with the same footprint as the nano Do you have any spare raw pcbs available please?

[mobith]

misterfpga_midi_shield.png (4.02 MiB) Viewed 9789 times

I had an arduino midi shield lying around so lashed that up for testing!

The optoisolator is connected to the shield_5V pin and so this must be wired to the nano_3V3 header to avoid over-voltage on the fpga.

JP7_1 = Rx
JP7_2 = Tx

[bnz99]

Just realized I have never posted my DIY midi pcb in this forum: https://github.com/bzeiss/mister-pcbs/wiki/Midi-PCB

Ah nice - you made one with the same footprint as the nano Do you have any spare raw pcbs available please?

Are you in the EU? I have a few, but at some point, I want to add jlcpcb assembly files for the smd parts of the board. That way, only the usb connector and the midi connectors would remain to be soldered. For outside the EU, it would probably be cheaper to order the pcbs fresh.

[kathleen]

Hi @bnz99
I from EU (Belgium to be precise) and I'd be interested by one card if any available.
No need to get the components soldered, my friend is electronic engineer so he'll do the job for me.
You can PM me to finalize the deal.
Thank you so much in advance.

[mobith]

Just realized I have never posted my DIY midi pcb in this forum: https://github.com/bzeiss/mister-pcbs/wiki/Midi-PCB

Ah nice - you made one with the same footprint as the nano Do you have any spare raw pcbs available please?

Are you in the EU? I have a few, but at some point, I want to add jlcpcb assembly files for the smd parts of the board. That way, only the usb connector and the midi connectors would remain to be soldered. For outside the EU, it would probably be cheaper to order the pcbs fresh.

I'm in the UK so almost

No worries about the SMD - I kinda prefer SMD soldering these days (as long as it's not the realllly small stuff)

[bnz99]

You may want to contact Nat from https://misterfpga.co.uk. He wanted to build a few. Personally, I'm not a seller and don't plan to be. So I don't want to deal with declaration forms and whatnot. It's just not fun for me

[kathleen]

I'd like to thank you, @bnz99 I've received the PCB today. Cannot wait to get it assembled by my friend in order to use it on my Mister.
Thank again !

[bnz99]

Glad that it arrived. So I received a package from JLCPCB today with the SMD parts preassembled and I have tested it on the Atari ST core with Cubase Score and it worked fine. I have pushed that update to the github project so that anyone who wants this can order this board directly with SMD parts preassembled from JLCPCB. It's only three through-hole parts (3x midi din5 connectors + one usb connector) left to solder that way.

[mobith]

You may want to contact Nat from https://misterfpga.co.uk. He wanted to build a few. Personally, I'm not a seller and don't plan to be. So I don't want to deal with declaration forms and whatnot. It's just not fun for me

All good! I ordered 5 bare pcbs - thanks for sharing the design!

PS: If anyone wants a bare pcb or a built one I will have three spare I think

[JimBobMcGee]

Made a Cubase 3 demonstration video featuring the new Dongle feature in the main Atari ST Core. Used an Akai S3200XL as the midi sound source for this

https://youtu.be/WiYBDQQIgEM

[snd32]

All good! I ordered 5 bare pcbs - thanks for sharing the design!

PS: If anyone wants a bare pcb or a built one I will have three spare I think

Hi all, I've just joined the message board!

Yesterday I've ordered my Altera Cyclone V based MISTer from retroremake.co/products/mister-pi-retro-gaming-fpga-board-mega-pack and while waiting for it to arrive I am looking for a MIDI interface for it I would like to use Atari ST and Amiga MIDI apps for making music

bzn99 design looks nice! mobith, if you have any MIDI boards left please let me know!