X-Authentication-Warning:	delorie.com: mail set sender to djgpp-bounces using -f
From:	"arizvi" <ahmadwaris AT hotmail DOT com>
Newsgroups:	comp.os.msdos.programmer,comp.os.msdos.djgpp
Subject:	Re: Creating a copy protected floppy
Date:	13 Jul 2005 11:23:06 -0700
Organization:	http://groups.google.com
Lines:	22
Message-ID:	<1121278986.869285.153180@g44g2000cwa.googlegroups.com>
References:	<1121199731 DOT 361001 DOT 326030 AT g43g2000cwa DOT googlegroups DOT com>
	<qtu8d1h1ot3deg6sfpo8a3fuk8bprasl7s AT 4ax DOT com>
	<Pine DOT GSO DOT 3 DOT 95 DOT iB1 DOT 0 DOT 1050713053319 DOT 19585A-100000 AT halifax DOT chebucto DOT ns DOT ca>
NNTP-Posting-Host:	66.32.211.247
Mime-Version:	1.0
X-Trace:	posting.google.com 1121278992 14776 127.0.0.1 (13 Jul 2005 18:23:12 GMT)
X-Complaints-To:	groups-abuse AT google DOT com
NNTP-Posting-Date:	Wed, 13 Jul 2005 18:23:12 +0000 (UTC)
User-Agent:	G2/0.2
Complaints-To:	groups-abuse AT google DOT com
Injection-Info:	g44g2000cwa.googlegroups.com; posting-host=66.32.211.247;
	posting-account=Se-Idg0AAAC00LEpjdiQS7ZeyWGDYpCA
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp
X-MIME-Autoconverted:	from quoted-printable to 8bit by delorie.com id j6DIU6hg001019
Reply-To:	djgpp AT delorie DOT com

>
> The NEC chip did/does have a command for reading a track but I think it
> just reads the data within sectors and not the raw bits.  Some
> programming details:
>
> "ClipX - Hardware - nec .pd765 - floppy disk controller - 8272a"
> http://www.clipx.net/ng/hardware/ng96a4.php
>
> "Programming the NEC µPD765 and Intel 82072/7 Floppy Disk Controller"
> http://www.isdaman.com/alsos/hardware/fdc/floppy.htm
>

Thanks for the links above!

The links indicate that the floppy controller can be programmed with an
adjustable bit rate of 500kbps, 300kbps or 250kbps in the Control
Register only for AT and PS/2 computers.  Does the functionality in AT
computers carry over to modern PCs? 

Thanks for the help,
Ahmad

- Raw text -