28 Mar
2001
28 Mar
'01
11:50 a.m.
EPP provides a bidirectional data port, a data strobe, an address strobe, and a
write strobe. It responds to a nWAIT/RDY signal, an interrupt, and three user
input (to the PC) signals that you are at liberty to use however you like. The
strobes are generated in hardware and rquire no software beyond the write to the
appropriate address.
The address strobe steers data to hardware that responds to address strobe, and
the data strobe does likewise with what you define to be data, so you certainly
have sufficient resources to effect an ide interface quite straightforwardly.
Moreover, if you write a word to the data port, it steers the data in successive
writes automatically with no software overhead.
Performance, however, is another issue.
Dick
----- Original Message -----
From: "Clint Wolff (VAX collector)" <vaxman(a)qwest.net>
To: <classiccmp(a)classiccmp.org>
Sent: Tuesday, March 27, 2001 10:32 PM
Subject: Re: ide harddrive
it'd be a fairly complicated schematic... The IDE interface is 16 bit
wide data, and a standard parallel port only has four bits of input.
An enhanced parallel port (EPP) can turn the data bits around, but
then you don't have any lines for RD*/WR*/A0-A2/CS1Fx*CS3Fx*, etc...
I certainly wouldn't want to do it, though I'm sure it can be done...
clint
On Tue, 27 Mar 2001, bill claussen wrote:
Evening folks, I am looking for a circuit using
the parallel port on a
pc to Ide interface, does anyone have a schematic for one?
I also have 20 (2.5 in) toshiba 4.8 gig drives (new and in sealed
antistatic). these are 2 mm interface ata4 44pin that I will offer to
sell to the group before listing them at ebay. ($75 ea + shipping)
I also have AMD K6-2 233 AFR Socket 7 processors (new) these also will
be offered to the group for ($20 ea), before I place them on ebay as
well.
I am going to put them up in two weeks, so if any one is interested
please email me at
elecdata(a)kcinter.net
Thanks
Bill Claussen
Elecdata1 (ebay)