Hi Laaca, thanks for checking! > ... FreeDOS, MSDOS 7.1, Windows98 and WindowsXP ... > existing 3,5 floppy disks all give the same (correct) results only > MSDOS gives wrong Total number of Sectors and Sectors per Cluster
As this is MS Win9x DOS 7, the wrong number is expected... > 2) For existing hard disks all three give different value for > Total Nr. of Sectors FD: 65525, MS: 65534, 98: 65526, XP: 15747 I assume you mean total number of clusters? And I assume you measured on a FAT32 drive which actually has more than 65536 clusters which cannot be expressed as 16 bit number? How many clusters does that drive have, for example according to dosfsck -v X: or so? > 3) Non existing drives: difference is in Sectors per Cluster: > in FreeDOS: all output seems to be "undefined", in other OSes > is all "undefined" except Sectors per Custer which seems to be > always 255 (FFh) As people might call this to find out whether a drive exists, FreeDOS should return the sectors/ cluster as 255 as expected for invalid drives... Trying with the FreeDOS 1.0 kernel 2036, I get: AX, CX, DX, BP, SI, DI, ES, SS, SP unchanged DS:BX 0:0, so I would not say "undefined". The experiment was to fill values like 1234 in all the registers to see what you get back later. The bugfix would make sure AL=255 is returned for int 21.1c calls for an invalid drive, but for CX and DX and DS:BX I am not sure whether it is better to change or not to change them? What do the other DOSes or DOSish OSes return? > 4) Other diferencies are in CD/DVD roms and flashdisks. Yeah, what happens for CD/DVD is kind of random I guess... Eric ------------------------------------------------------------------------------ This SF.net email is sponsored by: SourcForge Community SourceForge wants to tell your story. http://p.sf.net/sfu/sf-spreadtheword _______________________________________________ Freedos-devel mailing list Freedos-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freedos-devel
