non-DOS Floppy Disk format
Posted on 1997-05-19
I am trying to read a non DOS disk format ie it doesn't
have 512 bytes per sector. (I am assuming this as whenever
a try a read sector [INT 25h?] I get - bad sector found).
I know you can alter the Floppy disk parameters by altering the contents of a table ( I managed to deduce that much) whose address is stored at vector 1Eh - I just don't know how you are supposed to change the table to as I cannot find out what the contents of the table are. Do you have to do this under assembler?
Or is there a driver that you can use to do this?
I am using Win95 and WINNT both of which have different approaches to accessing disks. I have no trouble accessing standard DOS format disks using the Win95 and WINNT approaches ie CreateFile and DeviceIoControl.
If I change the contents of the table (or point to a different table - which I think is the safer course of action ) Can I then use the original APIs (CreateFile - DeviceIoControl) to access the disk as normal?
Is there an API set I should be investigating?
Any help that anyone can give me would be a help.