Bonsoir Paul,
> There is a bug in the web page: there is only 3 bytes reserved at offset 5 Sorry I have not paid attention to that, but as you can see in my mail, I have written that you can ignore 3 bytes :-) > Also you seems to have closed your eyes at a bug in FreeDOS: > > yes, 1c0 is the size, but not in bytes, but in paragraphs Yes. The size is given in paragraphs, all DOS versions do that because otherwise MCB could not allocate > 64 kB. Maybe I should have explained that instead of just mentioning the page which describes the data structure. > I am still at that point at reading your message. As mentioned, manipulating the memory allocation chain by hand is quite a bit of work, but for the sake of experiment, it is acceptable. Also remember that because your system will always have the same state after booting with the same options, you can write down the commants and later put them into a text file to re-apply the trick as often as you want, for example to check with different apps whether they still crash. As you cannot do interactive things, tha would be: a 39b:3 dw 5463 a 57ff:0 db 'M' dw 8 dw 47ff db 0 dw 0 db 'RESERVE' db 0 q But of course the values 39b and 5463 will differ on your system! Maybe the 47ff also differs, if you have less than 640 kB of low DOS RAM: Sometimes a few kB are reserved for BIOS purposes at the end, like at 9fc0:0, so there would be a MCB structure at 9fbf:0 instead of 9fff:0 which my example assumes. Either way, you would write everything from "a 39b..." to "q" into a text file, then you can do this: debug < textfile.txt to apply all changes with a single command. To find the correct values instead of 39b, 5463 and 47ff, you would use the manual MCB chain inspection and calculations outlined in my mail. The starting point is the value shown by MEM /D /P as MEM's location. It is a technical thing, but you will understand after playing around with the concept for a bit :-) Regards, Eric _______________________________________________ Freedos-devel mailing list Freedos-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freedos-devel
