I am getting there:
It seems my version now needs the 'CMD_RESET_ALL' to get working properly. Now Nextor cannot get passed the HW init. @S0urcerer, is this something you can build in?
10 fora=oto255 20 out&H11,6 30 out&H10,a 40 b=inp(&H10)xor255 50 printhex$(a);" ";hex$(b) 60 if a=b then nexta else end
after issuing the reset all cmd the above BASIC program runs properly to the end.
I have connected to RESET signal of the MSX to the CH376S chip (inverted) my the reset is too short.
Hi Dubbylabby,
Thanks for sharing this. The Audio definition is probably taking too much bandwidth for our dear MSX. But the Midi definition is probably doable. I don't have a Midi USB device (yet) so I can't develop a driver for it now.
After completing the USB Host driver, USB HID Keyboard and lately the USB Ethernet driver (all UNAPI compatible) I am first focusing on doing USB Hub first. This way we can connect not just one but multiple devices behind a powered USB hub! Including MIDI when we get around that.
But if anyone in the meantime wants to develop a MIDI driver that would be great 
Check out the HID Keyboard code, connect via UNAPI to the USB Host driver, and start responding to the specific MIDI control, interrupt and bulk endpoints.
Cheers...
Hi @S0urceror!
My knowledge about coding is very short (bad even at arduino so go figure...) but I will bring any source I can find and also I will pass this topic to my brother who is in the hardware side building things like ObsoNet and Omega Home Computers for the spanish community (and spanish based communities as we are documenting the most we can).
Thanks again for this amazing work. <3
BTW, I am busy integrating both the low-level USB Host driver and the Nextor driver together in one ROM. Than you switch between both. This makes things much easier. If I have it done this Easter I promise to put in some Easter eggs
Also I put up a couple of disk images. Put them in the root of your USB flash drive and reboot with my Nextor ROM and it will automatically boot NEXTOR.DSK (128Mb) image. Note that you can have multiple FAT16 images on the FAT32 capable CH376s.
Thanks, just caught your changes on github while they where just 37mins old
Straight away installed the new rom version and voila, a lot better! Then inserted an other USB stick,..rebooted and ...'...NOT connected'. Could not get it to work again. So I check the code and it seems it is not doing the real HW Reset just jet :
; --------------------------------------
; CH_RESET
;
; Clear the CH376 data buffer in case a reset was made
; while it was in the middle of a data transfer operation
;
; Input: none
; Output: none
CH_RESET:
ret
; ld b,64
;_HW_RESET_CLEAR_DATA_BUF:
Can you add it? Thanks!
EDIT: After manually patching nextor.com so it will do the actual hw reset I get to '-Disk NOT connected'
progress!