I wannted to do Direct Drive IO.
I can read directly but write is blocked!
Try to lock up Drive for so that Write to drive isn't blocked,
but the system is normally crashing then when I do any Direct Drive IO!
Ralph Brown has commented that Lock is only allocating 26 Bytes, but 32 Bytes Space using!
Saw someone doin it maybe over IOCTL-INT-API.
How to lock a drive in Pascal and assembler without causing a systemcrash through buggy Lock-command?