MSX USB

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By S0urceror

Expert (69)

S0urceror's picture

27-03-2020, 07:46

yes, I use OPF to flash my modified Nextor.

By lintweaker

Master (227)

lintweaker's picture

29-03-2020, 09:40

S0urceror wrote:

yes, I use OPF to flash my modified Nextor.

Great! Can you flash an empty flashchip from MSX or do we need to start with a pre-programmed one?

I have some CHS376S chips on order..I'll finish my first PCB this week.

By S0urceror

Expert (69)

S0urceror's picture

29-03-2020, 20:50

OPF clears and writes from MSX. I boot MSX-DOS from floppy. Write Nextor from it and press reset. If all goes well Nextor boots up and scans for an inserted USB flash drive.

I’ll put up a page with all the binaries to get going more quickly. Plus some instructions.

Btw. I realized that my design uses the SCC mapper. My Nextor image is adapted to handle that. If you prefer Ascii8/16 please let me know. Also good to have a switch that disables the rom during startup to prevent auto start. You cannot flash over the currently running image.

PS. If you have some pictures of your work I would love to see them Smile

By lintweaker

Master (227)

lintweaker's picture

30-03-2020, 09:23

I figured you are using the SCC mapper Smile I do not mind using it. We can change to Ascii8/16 later. I'll consider my first version a 'testing' version.

By Wolverine_nl

Paragon (1097)

Wolverine_nl's picture

30-03-2020, 09:50

Hi, is this all going into the same thing as the RookieDrive?

By lintweaker

Master (227)

lintweaker's picture

30-03-2020, 18:21

First version of my PCB will look something like:

By lintweaker

Master (227)

lintweaker's picture

06-04-2020, 13:55

@S0urceror,
Got my first bunch of CHS376S chips! PCBs should hopefully follow soon.
Did you manage to prep the needed tools and binaries?

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

By popolon_

Rookie (30)

popolon_'s picture

06-04-2020, 21:12

Why wuold you put sd card interface into this cartridge, when this is for usb interface? And in rookiedrive you can use usb sd card reader.

By ducasp

Champion (273)

ducasp's picture

06-04-2020, 21:20

popolon_ wrote:

Why wuold you put sd card interface into this cartridge, when this is for usb interface? And in rookiedrive you can use usb sd card reader.

Well, you could save the USB port for a second drive, another function, etc without needing a hub. It won't hurt, for sure. Wink

By lintweaker

Master (227)

lintweaker's picture

07-04-2020, 09:11

popolon_ wrote:

Why wuold you put sd card interface into this cartridge, when this is for usb interface? And in rookiedrive you can use usb sd card reader.

The chip supports both USB and SD, so be able to utilize both is a nice option to have. The PCB is prepared for use with SD. I can decide whether to populate the socket or not.

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