MegaFlashRomSCC+SD Mapper emulation bug?

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By giuseve

Paladin (729)

giuseve's picture

08-03-2016, 19:35

my os is windows 10 64bit and openmsx is 64bit version too!
Yes, you're right: 1,8 GB is enough for me.
But my SD on real MFSHRSCCSD is 4Gb. So when I will find a tool to transform in .DSk FAT16 IMAGE my REAL SD it would be nice to use the 4GB configuration for the sd of MFRSCCSD on Open

By Wild_Penguin

Champion (461)

Wild_Penguin's picture

08-03-2016, 19:57

Manuel: Sorry I'm sometimes sloppy at reading. Especially after doing work overnight Shocked!

Giuseve: Have you tried the tool I linked in big MFR topic? Does it not work for you, for making images of your µSD cards? If the file ending is wrong, just rename it. Make sure you make a whole disk image (not of a single a partition, although that might work, too - but might make things unnecessarily complicated, if you want to use more than one partition per µSD card). If the tool does not work, I'm sure there are some WIndows users here who can help. The task is quite common (for advanced use cases) so there's bound to be a tool for it, probably several.

EDIT: If you are not afraid of the command line, there's even dd for Windows, it seems :) However, be careful with dd! I don't know about the Windows version, but at least on Linux the tool has no protection whatsover for writing on the wrong device node (as root). Which means: A typo (or a misunderstanding of what you are doing) could kill your C: -drive (or, actually "just" the data on it, the drive will still work!) - or any one of your other drive(s) partition(s).

EDIT2: There's even dd-gui. But haven't tried it either, myself, as someone who has abandoned Windows over ten years ago - although it has OS X and Linux version - but I also just prefer the command line for this kind of things.

By Manuel

Ascended (14552)

Manuel's picture

08-03-2016, 22:56

giuseve: so, you are on 64-bit Windows 10 with 64-bit openMSX. Is it correct that your C: drive is formatted as NTFS, as would be usual with Windows 10?

By giuseve

Paladin (729)

giuseve's picture

09-03-2016, 18:11

@manuel.
Yes, this is correct! My C Disk is a SSD NTFS.
It seems the problem is that OPEN can not manage Images bigger than 2GB TOTALLY, I mean VirtualSD1 + VirtualSD2.
In fact now it works with 1024 as VirtualSD1 and 100 as VirtualSD2. But if I try with 1.8Gb and 200Mb it hangs Up.

Other problem: a copy from IDE Virtual DISK to Virtual SD takes a loooong time for 740Mb only.
I will try the WILD_PENGUIN trick: to rename the Virtual IDE partition to Virtual SD

@WILD_PENGUIN: the WIN32diskimager doesn't work on WIN10 64bit. I will try something else.
I have a readymade 2000Mb image that I can fill easily with DISKEXPLORER.
The problem IS how to set it as VirtualSD, without waiting so along time for a IDE-to_SD copy

Last trick: how to disable the SHA check sum?

By Manuel

Ascended (14552)

Manuel's picture

09-03-2016, 18:32

That trick will not work. Copying takes a long time (it's an MSX that's copying), but you can speed it up with F9 (full throttle).

The check sum can be disabled by disabling reverse. It's needed for that.

By Wild_Penguin

Champion (461)

Wild_Penguin's picture

09-03-2016, 20:21

Hmm., I can use > 2gb for certain... my first image was 16gb, but I must admit that I had only 2gb of partitions. But even right now I have 2080M and 100M µSD cards emulated here. But I'm using Linux, so it could be a difference in the build...

As for the IDE -> SD copy, that didn't work correctly for me, either (see my previous somewhat lengthy posts, sorry for my inability in being consice). So better believe what Manuel says Wink (If I'm not mistaken, that's what he is referring with "that trick"). And I actually never suggested doing that (I think, unless I've forgotten) - what I did suggest, though, was to copy the µSD card from the real MSX / MegaFlashRomSCC+SD over the images created automatically by OpenMSX.

I had partial success only by copying the IDE image into MegaFlashRomSCC+SD: I had three partitions in the IDE image, and the last two worked - but those were empty (well the other one had like 3 files in it), and all data was on the first one, and that didn't work. So: if you need to get the data out from your IDE image, use the F9 -trick (while copying to MegaFlashRomSCC+SD, to "dir-as-a-disk" or whatever you like). Or, if that is too slow, - learn how to use "diskmanipulator" (in OpenMSX console).

Also, on Linux, I can mount the images of the MegaFlashRom_SCC+SD cards without any issue. That's what I use for large file operations (well, actually any transfers involving more than 1-2 files from PC <-> emulated µSD card, since it is just so much easier to work with a transparently mounted FS). Maybe there's some tool for Windows that can "mount" the partitions, too. But that wont help with copying from an existing Sunrise IDE partition (since those are not mountable, at least not reliably).

Hope this helps!

P.s. In case someone else using Linux is reading this, for whole disk images, use kpartx utility or mount with -o loop,offset=XXX ; offset can be found with parted (change untis to bytes) for example.

By giuseve

Paladin (729)

giuseve's picture

09-03-2016, 21:23

thanks.
I was wondering about this.
With realsd i can use the sd on my windows as a normal unit copying and moving files easy. (it is fat16)
Is possible to MOUNT th virtualSD.sd file and make the same?

Manuel: any idea about this?

By Wild_Penguin

Champion (461)

Wild_Penguin's picture

09-03-2016, 21:42

I just think that Linux may be more versatile in this regard (mounting images). Just write files to the µSD cards, or use diskmanipulator to update the µSD card images while running OpenMSX. And then use an image writing software to update whichever is outdated to/from µSDcard <-> µSDcard images, maybe with the dd for windows? Does that, too, not work in Windows10? You are going to need a solution to do this in any case.

A quick Google search came up with this for mounting. Maybe some of the mentioned software will work on Win10.

By Manuel

Ascended (14552)

Manuel's picture

09-03-2016, 22:00

giuseve: I don't use Windows myself, so I can't really give you Windows specific advice there. Wild_Penguin is doing his best at it, though Smile

By giuseve

Paladin (729)

giuseve's picture

09-03-2016, 22:46

I will check.
Anyway WIN10 can MOUNT .ISO easily.
I will try with .Sd files too !!!

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