3.5" floppy drive question(s)

[Chuck Guzis]

On 12 Oct 2008 at 15:51, Fred Cisin wrote:

> Considering the OS, the situation (OS using WRONG buffered content for
> disk I/O), the possible consequences, and the complete failure to ever
> document the problem and/or the work-around,  I might be able to try to
> claim that it wasn't a typo  :-(

No, I don't know.  Microsoft does say in the documentation for INT 
21H, function 0DH ("Reset disk") that "Function ODH should be part of 
Control-C interrupt handling routines so that the system is in a 
known state when an application is terminated."  However, ISTR that 
after some point MS-DOS, this function didn't flush *all* buffers. 
(I'm quoting from a MS-DOS 2.10 reference).

It could be that Ctrl-C, even at a command prompt didn't always do 
what it was supposed to and Microsoft didn't care to document this 
"feature".

Cheers,
Chuck