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First post, by b4283

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sometimes user choose to make CD-ROM image for better performance
but it comes up with another problem when dealing with a game that has multiple CDs.
of course, in normal game play, user can always push the eject button to change discs. But in DOSbox, one must input commands to change discs which is unavailable when the running game asked for disc2 or more.
"imgmount" became useless when meeting with such problems, while the solution is to mount the real CD-ROM, save the game after changing the disc, and then back into using "imgmount".

Reply 1 of 11, by b4283

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my idea is to appoint all parameters that will be used in game play
and use a specific pair of hotkey to change between CD-ROM images

like "imgmount d -1 c:\disc1.cue -2 c:\disc2.cue -3 c:\disc3.cue -t iso"
uses a hotkey like CTRL-F2, and the mount image will change in background so user can continue on game play without quitting the game.

Reply 3 of 11, by Atrus

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Qbix wrote:

floppy images are swapped with ctrl-f4

yes, but you can't mount more than 1 image with imgmount so CTRL-F4 is useless.Only the BOOT command can do this but what about the non-booting images that are the majority? also, segmantation faults happen all the time using imgmount at least in my computer.

Viva la Revolucion

Reply 4 of 11, by prompt

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I have a small patch that corrects some bugs in the cd image code. Apply with (linux): patch -p0 < cd_image-fix.diff

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  • Filename
    cd_image-fix.diff
    File size
    2.24 KiB
    Downloads
    157 downloads
    File license
    Fair use/fair dealing exception

Reply 6 of 11, by Qbix

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if (tmp > 38) return -1;
you add this (concerns strlen(ident)
also you increase the length of ident.

A bit odd at first glance.

My fixes are mainly the cdrom label if larger then 8 characters being modified to read 8.3

Water flows down the stream
How to ask questions the smart way!

Reply 7 of 11, by prompt

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if (tmp > 38) return -1;
You are right, this check is unnecessary and can be omited.
Actually the seg. faults were caused by directory entries that were larger than the standard defiened, so I increased the ident field and added some array boundary checks.

Reply 8 of 11, by prompt

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The above patch introduced a new bug, please use this corrected patch. Sorry.

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  • Filename
    cd_image-fix.diff
    File size
    1.97 KiB
    Downloads
    138 downloads
    File license
    Fair use/fair dealing exception

Reply 9 of 11, by Qbix

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argh i allready committed it together with my changes.
will commit it again with hopefull all your changes. will attach the file so you can check it.

Attachments

  • Filename
    drive_iso.cpp
    File size
    11.93 KiB
    Downloads
    122 downloads
    File comment
    my current and cvs current iso
    File license
    Fair use/fair dealing exception

Water flows down the stream
How to ask questions the smart way!

Reply 11 of 11, by rcblanke

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Hi guys,

I suppose this patch is implemented is the current CVS version of Dosbox? If so, would you please explain the exact syntax to use multiple images, and share information about the hotkey for swapping the mounted images? I cannot get it to work (trying it with The 7th Guest to no avail)...

...Or, are you guys just talking about a patch to fix various segfaults? in that case, are there any plans to support multi image-mounting?

Regards,

Ronald