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Homebrew PS2, PSP & PS3 Development Discussions
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sebzzz
Joined: 22 Jan 2007
Posts: 2
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 Posted: Mon Jan 22, 2007 2:11 am Post subject: Memorystick Raw Access |
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Hi,
for my program I need raw access to the memorystick. My Idea is to open 'ms0:' like a block device (in linux I would simply open '/dev/ms0' or something like that), but sceIoOpen denies that.
I already searched the forum and found other names for the memorystick device, like 'mscm', mscm0', msstore' ... and so on.
Most of these devices I can sceIoOpen but when I try to read from them, I just get an error.
I am able to raw-access 'umd0:' or any files on the memorystick, but I cant access ms0 as a block-device.
The purpose for this is for example the ability to format the stick by myself through the psp (yes yes, I know, you could do it from the xmb) or to measure the rawspeed of the memorystick (without going through the file-system). |
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moonlight
Joined: 26 Oct 2005
Posts: 567
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| Posted: Mon Jan 22, 2007 5:11 am Post subject: |
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The following code works fine.
| Code: |
SceUID fd = sceIoOpen("msstor0:", PSP_O_RDONLY, 0);
if (fd < 0)
{
// Error handling here
}
int read = sceIoRead(fd, buf, 512);
sceIoClose(fd);
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It seems that the size to read has to be multiple of 512.
I guess that the same goes for writing, but not tested that.
Unlike umd0: where the unit is the sector (2048 bytes), the unit here is the byte. |
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sebzzz
Joined: 22 Jan 2007
Posts: 2
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| Posted: Mon Jan 22, 2007 5:35 am Post subject: |
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THX moonlight! It works now.
'msstor0' seems to be the only devicename that works, and that was the only one I havent testet out :) |
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