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Question: how to extract the file 'ramdisk.dat' from the Acronis Cd/iso. It doesn't matter what tool I use, I can't access the Cd/iso (the Cd is oke and boots)
Use a tool like
ISOBuster.
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Last Question: is there a way to set a variable in/from the menu? I created a small boot file, with only a simple 'confis.sys' and 'autoexec.bat', which loads cdrom. After its boot it must change to a sub-directory in 'images' set by the variable. This way there's no limit for the program size (no 2.8Mb diskette limit size, for Non-Linux progs).
In many menu.cfg's they use UbcdCmd=xxxxx, but I can't detect what it does.
The ubcdcmd=xxxxx is used by Erwin's DOS images (eg. lzubcd.img, fdubcd.img) to launch DOS apps on the UBCD (located under \dosapps). Basically, xxxxx is a subdirectory name under \dosapps, and Erwin's DOS images will 'cd' to \dosapps\xxxxx, then run 'startup.bat'.
If you are interested to know how it works, you might want to look at one of Erwin's DOS images, or email him directly to ask.