Hello Eric, On 31 May 2021, at 14:39, Eric Auer wrote:
Hi Mercury, Steve, Carsten and Ladislav: You are all ignoring the fact that you can simply use the already existing API to provide your own, graphical floppy change (or DJ mechanism) dialogue. There is no need to re-invent the wheel! INT 2F CU - DOS 5+ - FLOPPY-DISK LOGICAL DRIVE CHANGE NOTIFICATION AX = 4A00h CX = 0000h DH = new drive number DL = current drive number Return: CX = FFFFh to skip "Insert diskette for drive X:" messageNote: called by MS-DOS 5.0+ IO.SYS just before displaying the message"Insert diskette for drive X:" on single-floppy systems Your apps can hook int 2f, function 4a00. If it returns cx=-1 then DOS will assume that you have already asked the user to switch to the new disk. DOS will not show a text message about that and will not wait for keyboard input if you do this. Eric
this helps for new applications or applications where we have the source, but it does not help with all the existing applications (possibly closed source).
If I understand correctly, the desired effect would be that access to floppy B: without a physical 2nd floppy in the system will return an error to the application instead of the DOS kernel intercepting the access and prompt for a floppy change.
This might already be possible with the available drivers/config.sys options.
Greetings Carsten _______________________________________________ Freedos-devel mailing list Freedos-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freedos-devel
