unhd (Michael A Super) (04/08/90)
I have a question on IBM PC floppy drive write protection: Is there any way to override the write protection on a disk (write to a disk without a notch, for example) through software? I know DOS won't allow this, but perhaps through the use af assembly code? I have never seen anything that will do this, and I was wondering if it was the controller that prevented these writes. I would appreciate the posting of any comments/solutions. Mike Super University of New Hampshire
scjones@sdrc.UUCP (Larry Jones) (04/08/90)
In article <1990Apr7.213734.19233@uunet!unhd>, mas770@uunet!unhd (Michael A Super) writes: > Is there any way to override the write protection on a disk (write > to a disk without a notch, for example) through software? I know DOS > won't allow this, but perhaps through the use af assembly code? I > have never seen anything that will do this, and I was wondering if > it was the controller that prevented these writes. I would > appreciate the posting of any comments/solutions. Yes, there is hardware on the controller that enforces the write protect, so there is no way to disable it in software. On the other hand, a toggle switch and a few wires work wonders! ---- Larry Jones UUCP: uunet!sdrc!scjones SDRC scjones@SDRC.UU.NET 2000 Eastman Dr. BIX: ltl Milford, OH 45150-2789 AT&T: (513) 576-2070 "You know how Einstein got bad grades as a kid? Well MINE are even WORSE!" -Calvin
mathrich@mthvax.cs.miami.edu (Rich Winkel) (04/10/90)
In <1990Apr7.213734.19233@uunet!unhd> mas770@uunet!unhd (Michael A Super) writes: >I have a question on IBM PC floppy drive write protection: > Is there any way to override the write protection on a disk (write > to a disk without a notch, for example) through software? I know DOS No. The write protection is done in hardware. You can see this by looking at the schematics and documentation in the IBM PC technical reference. There's no way to get around it with software. Rich