The Big MegaFlashROM SCC+ SD Topic

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Van meits

Scribe (6530)

afbeelding van meits

15-07-2013, 22:18

understood... i can live with it and especially the reasons Smile
was a bit surprised that it did not work in a primary slot while i understood from the above that /u was needed if you wanted to start MG2 from MFR in a slotexpander..

Van Guillian

Prophet (3515)

afbeelding van Guillian

16-07-2013, 09:01

MegaFlashROM SCC+ SD is "a slot expander" You have different devices in different subslots. MegaFlashROM SCC+ is in subslot 1 as you can see when using OPFXSD. That's why Solid Snake will not work.
If you try the original cartridge in an slot expander it will fail.

Van msx fan finland

Champion (500)

afbeelding van msx fan finland

22-07-2013, 15:39

Hello everyone :I'm Mika from Finland
I'm using MSX computer Panasonic A1 FS Turbo R GT version.
ita 1 lksa 07374 serial.
i have got both MFR's so i have got mfr sd too. its a great
gift to our msx society. im using it in slot A. i have got 2 pcs sd cards and there is 4 gb storage capacity each. i have got 8 gb storage capasity now. maybe later im using bigger sd cards. im going to study and learn how msx works.
im not good with computers but i want to learn more.
im here to discuss with you in english. im very happy with this mfr sd. Thanks Manuel P.
Cheers,

Mika

Van ApolloBoy

Expert (96)

afbeelding van ApolloBoy

23-07-2013, 09:04

I just tried another MicroSD card and I'm still having the same issue. I also tried using an 8 MB partition as opposed to a 16 MB partition (the maximum for FAT12) and it's not fixing it. I'm really at my wit's end here and I feel like I have no choice but to upgrade the RAM in my system, which would be the first time that I'd ever have to perform a mod just to fix an issue with a flash cart...

Van Guillian

Prophet (3515)

afbeelding van Guillian

23-07-2013, 11:28

ApolloBoy wrote:

I'm really at my wit's end here and I feel like I have no choice but to upgrade the RAM in my system, which would be the first time that I'd ever have to perform a mod just to fix an issue with a flash cart...

Do you mean the problem with the number of files is related to the flash cart? I don't think so.
You said you can't copy more than 47 files using your Mac or PC (Windows 7/XP)
I can copy up to 112 using Windows 7 and MSX.

Are you copying short filenames (8+3)? If you use long filenames you can only use 56 files as Manuel explained:

Manuel wrote:

If your system uses long filenames support for FAT, it will take 2 entries per file, so you can only use half of 112 files on it... Perhaps it's something like that?

Please, format the card again (or erase all the files in it) and copy files with short names like "MGEAR2.ROM" and not "Metal Gear 2 - Solid Snake.ROM"

Van sd_snatcher

Prophet (3608)

afbeelding van sd_snatcher

23-07-2013, 12:22

@ApolloBoy

Have you limited *all* the filenames to 8.3 letters, and only UPPERCASE? Otherwise they may take much more than two directory entries per file:

1 entry will be used for the legacy FILE~1.NAM name
Plus 1 or more entries will be used for the LFN (LongFileName)

Also, use the software AppleOff to get rid of the hidden files that Mac OS-X will create on your filesystem, all of them taking a lot of entries.

And don't put a label on the disk. Leave without a label, showing as "Untitled" on Mac OS-X. Because the label will also take some more directory entries.

If you don't want to worry about all that, then the best alternative is indeed to use MSX-DOS2 and have folder support.

Van Jipe

Paragon (1586)

afbeelding van Jipe

23-07-2013, 13:07

you can use Long files name killer for repair the directory
http://www.vector.co.jp/soft/other/msx/se184251.html

Van ApolloBoy

Expert (96)

afbeelding van ApolloBoy

23-07-2013, 18:26

Guillian wrote:

Are you copying short filenames (8+3)?

I've been doing that this entire time; in fact I renamed the file extensions in all-caps to see if that would change anything. I was able to squeeze a few more files in this time but I still can't get more than 60 files now. I haven't named the disk partition at all and I've also deleted any kind of hidden files used by Mac OS X.

I don't understand why the MFR's firmware isn't in charge of handling the SD card, all of my other flash carts rely on their firmware to handle file systems and that sort of thing, not the host system itself.

Van Guillian

Prophet (3515)

afbeelding van Guillian

23-07-2013, 22:40

ApolloBoy wrote:

I don't understand why the MFR's firmware isn't in charge of handling the SD card, all of my other flash carts rely on their firmware to handle file systems and that sort of thing, not the host system itself.

Actually, the MegaFlashROM SCC+ SD firmware handles the SD card quite well (up to 32GB cards and partitions up to 4GB)
As I said, you problem is not related to the cartridge, but to the format of the card (FAT12).
FAT12 has a limit of 112 root entries. If you use long filenames, then each file will take two entries.
I can copy 112 files to a FAT12 card (using Windows 7 and MSX). Other users can do it also.
If you can't copy more than 60 files using your Mac/Windows 7, how is that related to the cartridge?

Let's make a simple test.
- Download the latest firmware
- Copy kernel.dat to an empty SD card
- Install it from recovery (Press menu UP while booting and choose F4 option)
- Format you card and make a 16MB partition (CALL FDISK from BASIC)
- Run the next BASIC program:

10 FOR I=1 TO 112
20 PRINT I
30 SAVE HEX$(I)+".BAS"
40 NEXT

You should get 112 files on your card. If that is right, the cardtridge and card is working as expected.
Then erase all files and try to copy 112 files from Mac/PC. If you get some error then it is related to those OS or to the files you are trying to copy.

Van ApolloBoy

Expert (96)

afbeelding van ApolloBoy

23-07-2013, 23:57

Guillian wrote:

Actually, the MegaFlashROM SCC+ SD firmware handles the SD card quite well (up to 32GB cards and partitions up to 4GB)

But I don't understand why it still needs MSX-DOS2 just to use FAT16 partitions; the other flash carts I own are capable of using FAT16 or even FAT32 partitions regardless of what system they're running on. Perhaps this is something you can look into? It'd be nice to have a simpler solution to loading ROMs not unlike the Everdrive series of flash carts.

Anyway, I've reinstalled the SD kernel several times and it never fixed the issue. I'll give the BASIC program a try and report back.

EDIT: Ran the program and it reported that there was a "Disk I/O error in 30". I typed in line 30 exactly as shown so I'm not sure what's going on.

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