🚀 go-pugleaf

stern@mble.philips.be writes:

>Could anybody explain me how to detect if a floppy is already formatted
>or not? And also if it is simple to program a 'quick format' like in
>DOS 5.0 format.

I'm posting this time, having answered this before.

In assembler

mov ah,2	;Read Sector function
mov dl,driv_num	;0-3 allowed
mov dh,0	;head number
mov cx,0001	;track 0, sector 1
les bx,buffer	;es:bx points to read buffer of 512 bytes
mov al,1	;1 sector to read.  This will fail on HP-150s
int 13		;do the I/O thing
jc error	;Carry flag set on error.  This actually can cover
		;a number of things: not formatted, door open,
		;diskette in sideways

;If you want to be really cute, you can pass a far address of a variable
;in C and use that to let a C/C++ program know the results.

BobK