Firmware: exFAT support

Question

Firmware: exFAT support

Closed this issue 4 years ago · 6 comments

Sometimes it would be awesome to have files bigger than 4GB on the SD card (big hdf's for example), but that is not possible at the moment.

Answer 1 · 2020-04-17T11:35:16.000Z

I think it will be hard to find an exFAT implementation for the microcontroller.

Answer 2 · 2020-04-17T12:02:01.000Z

Also the SD card in the mist is rather slow. So there's basically no valid use case for gigabytes of data. It would take the mist several days to read that. And if you only use a fraction of the image you can likely live with less than 2gb max image size.

Answer 3 · 2020-04-17T12:16:21.000Z

It works quite well on MiSTer when I have hdf files that are 8GBs (for the whole WHDL collection)

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On Fri, Apr 17, 2020 at 2:02 PM Till Harbaum ***@***.***> wrote: Also the SD card in the mist is rather slow. So there's basically no valid use case for gigabytes of data. It would take the mist several days to read that. And if you only use a fraction of the image you can likely live with less than 2gb max image size. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#143 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAHY72ASOPF45U4CXLPAL7TRNBAMRANCNFSM4MH4BKXA> .

Answer 4 · 2020-04-17T14:55:08.000Z

With direct SD access, it's about 1 megabytes/sec. With sequential read you could read 8 GiB in 8000 secs. Random reads and writes will take forever.
Btw, I don't think there's enough Flash/RAM for an exFAT implementation.

Answer 5 · 2021-05-15T17:52:57.000Z

If still interested:
https://www.atari-forum.com/viewtopic.php?f=115&t=40499

Answer 6 · 2021-05-30T21:59:06.000Z

Latest firmware supports the exFAT filesystem.