Only file sizes >=100 MB are too much for the MSX to show (deleting those works fine).

Free space is shown correctly on all systems including the MSX. Next I created some different sizes, and repeated tests with those.Įverything seems to work now: both Linux (using Ubuntu 9.10 here) and Windows (XP, SP3) recognize the card correctly, and don't touch its bootsector. Then I extensively tested the created image: filled to the brink on Linux-PC, booted on 1chipMSX, ran some programs, deleted some files, put it in Erikie's SD interface, ran some programs, deleted some more files, put in card-reader on Windows-PC, checked disk, added some files, put back in 1chipMSX and checked out bootsector, directory, and the added files. This in order to have cards recognized reliably on all systems, so that no system will feel the need to 'correct' errors or write where it shouldn't because it mis-understands the format. Next I hand-crafted a bootsector, trying to make things as compatible as possible. So I dove into FAT16 bootsector format, and found one of the best write-ups on Wikipedia. My wishlist was simple: 1) enter new card, with random bits on it, 2) perform some sort of 'quick format' operation on it, 3) copy files on it using either MSX, Windows-PC or Linux-PC, 4) boot 1chipMSX with it, use same card for file storage on Erikie's SD interface. Maybe I'm being stupid here, so please point me to it, if such a tool already exists! I know of Fdisk for Sunrise CF interface, but it creates partitions on CF card (and not fully PC compatible, either), so that isn't what's needed.

I haven't seen a tool yet that creates (suitable) FAT16 partitions on the MSX itself.

Problems may have been caused by exact bootsector format, I might try this again later.

I tried to combine bootsector + partition table, but this caused problems with the card recognition (which in turn caused frequent corruption of the disk).

Linux has some tools to create / check FAT partitions, but somehow these (m)tools didn't work for me.

Maybe there's ways around this, but they're not simple or reliable.

Windows seems to insist on formatting cards with a partition table (containing just 1 partition).

1chipMSX has much better FAT16 recognition, but that's of little use if you can't exchange files.Erikie's SD interface BIOS (4.03, with FAT16 patch loaded) doesn't recognize cards that contain a partition table.But getting this to work, I ran into some problems: Wanted all my MSX files on a single SD card, but with a catch: same card should be usable on both Erikie's SD interface, and 1chipMSX (with each their own card, PC MSX echange problems double, and you keep copying files *forever* - not good). Hello folks! I'm happy owner of both Erikie's SD interface v2.2, and a 1chipMSX.

Format sd card fat16