Hi!
You use to promote MSdos 7.1. Have you ever found a way to get sound on it.
Sound, network and graphics are not related to DOS as operating system: Because the kernel does not support those, the applications, not the operating system, are the ones who have to support it. This also means that apps with support for those will have support for them on all versions and brands of DOS. It should be possible to use MPXPLAY to get DOS sound with modern hardware: https://mpxplay.sourceforge.net/ It might even be possible to get old games which expect ISA SoundBlaster hardware to work on modern hardware with the help of SBEMU or DOSBOX-X. Those have drivers for modern sound chips (AC97 and HDA standard, I guess) and provide simulations of old SoundBlaster soundcards: https://www.bttr-software.de/forum/board_entry.php?id=20131&page=0&order=time&category=0 https://dosbox-x.com/ I have never tested those two myself, so I would love to hear from others how well they work :-)
I deleted a command called KILL on it. Do you know what that command does because I don't?
It might be for killing tasks. DOS itself does not support multitasking, but MS DOS 7 is the DOS which ships with Windows 95 and 98, so maybe it simply is a Windows command line tool to stop Windows tasks.
I love the large file size that it supports. Freedos is limited to 2 gigs and PCdos stops a 8 gigs.
It would surprise me if PC DOS supports 8 GB files. Technically, the bottlenecks are the ability to seek and the file size. For relative seek, you can only go +/- 2 GB from the current point. Absolute seeks could be defined as 0 to 4 GB from the start or the end of a file. A flag when opening/creating a file with int 21.6c determines whether int 21.42 seeks should work 2 GB style or 4 GB style for that file. According to our kernel source code at https://github.com/FDOS/kernel/blob/master/kernel/dosfns.c FreeDOS does not yet support 4 GB file open and seek! But it does treat dirent.dir_size as ULONG, max 4 GB. The file size can be up to 4 GB on FAT filesystems, but one could check the cluster chain length or put a few extra bits somewhere in the directory entries? I do not know which DOS and Windows brands support such extensions for FAT filesystems, but I think EDR-DOS is one of the brands working on this and proposing an interface for it? Regards, Eric _______________________________________________ Freedos-user mailing list Freedos-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freedos-user
