Does his code not write to the disk .

\\\\||////
(@@)
ASHLEY4.

Batteries not included, Some assembly required.

well! under BOCHS my code works, but in real not. I tested it with an completely unbroken floppy, and there came the misstake again. I'll revise it again, maybe I didn't find a misstake.

joachim_neu, v2os had a simple FS, go to there old site and check it out, first go to
FAQ's and the v2_FS.
http://www.v2os.cx/old/
Also here as good info for fat etc.
http://www.dacya.ucm.es/luis/docencia/aetc/tae/chpt22.htm

\\\\||////
(@@)
ASHLEY4.

Batteries not included, Some assembly required.

now I found the misstake! it read and wrote 2 sectors too much. BOCHS didn't mather, but the real PC... and now the problem with the writing after the second time executing is running, too! very good. much thank to everyone of you, for help and tipps!