MSX USB

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By Wolverine_nl

Paragon (1097)

Wolverine_nl's picture

07-04-2020, 10:28

will this eventually be available for everyone to buy or is this just a prove of concept project?
Because I am getting excited for all the possibilities. Wink

By lintweaker

Master (227)

lintweaker's picture

07-04-2020, 11:14

Wolverine_nl wrote:

will this eventually be available for everyone to buy or is this just a prove of concept project?
Because I am getting excited for all the possibilities. Wink

Once proven working, I'll put up the Kicad files on github. Making it a real cartridge with housing would be nice.
I consider the current version a proof-of-concept, we can discuss changes/additions etc here.

By popolon_

Rookie (31)

popolon_'s picture

07-04-2020, 11:31

I also ordered pcbs to test this, using the schematic currently found from that github kicad files, and with traditional chips (not surfacemounted) and that CH376s board connection.

By АIеks

Paladin (833)

АIеks's picture

07-04-2020, 14:46

Can this USB device be more versatile and simpler than the MAX3421E for $4?

By lintweaker

Master (227)

lintweaker's picture

07-04-2020, 18:25

АIеks wrote:

Can this USB device be more versatile and simpler than the MAX3421E for $4?

That device only has a SPI interface...

By S0urceror

Expert (69)

S0urceror's picture

08-04-2020, 10:46

I have put installation instructions and binaries online in my Github. You can find it here.

You can use these to flash an alternative Nextor rom or the MSX USB host driver. With the underlying drivers USBEther.com and USBKeybd.com you can enable the USB device within our beloved MSX.

Please note that the USB Ethernet Driver currently supports the USB CDC ECM protocol. Any USB Ethernet adapter with the Realtek RTL8153 chipset will automatically work. Unfortunately, a lot of USB Ethernet adapters out there only implement their own proprietary, read not standards based, protocol. So please look carefully if your USB Ethernet adapter support the USB CDC ECM standard.

By lintweaker

Master (227)

lintweaker's picture

08-04-2020, 11:39

Thanks! Maybe it's already in the git repo but, with what tool to flash from MSXDOS? (I can probably use my TL866 to flash).

BTW I see you've started a CPLD version Smile
I just got a ATF150x development kit (I still have issues getting FGPAs to work).

BTW 2: the nextor.rom is 1MBit (128kb) your schematic and my PCB can handle 4Mbit flash. Any use for the additional space?

By S0urceror

Expert (69)

S0urceror's picture

09-04-2020, 08:03

lintweaker wrote:

BTW Is it easy to also support the SD next to USB?

Don’t have experience with SD. Have only concentrated on the USB part.
But it is nice to include this option as well.

By S0urceror

Expert (69)

S0urceror's picture

09-04-2020, 08:06

lintweaker wrote:

Thanks! Maybe it's already in the git repo but, with what tool to flash from MSXDOS? (I can probably use my TL866 to flash).

I use OPF.com to flash from within MSX dos. I’ll put up a link to the tool. Another tool I used in the past to flash is FL23.com. I’ll add it also to the instructions.

By S0urceror

Expert (69)

S0urceror's picture

09-04-2020, 08:17

lintweaker wrote:

BTW I see you've started a CPLD version Smile
I just got a ATF150x development kit (I still have issues getting FGPAs to work).

I always wanted to get some experience with CPLDs and also wanted to simplify my schematics. I don’t have a working setup yet but when it does I’ll let you know.

lintweaker wrote:

BTW 2: the nextor.rom is 1MBit (128kb) your schematic and my PCB can handle 4Mbit flash. Any use for the additional space?

Yes, we have enough space. Ultimately I want to combine Nextor and USB Host driver rom together. I now have them separate.

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