MFM to IDE was RE SCSI -1 to IDE and SD project

Rod Smallwood rodsmallwood at btconnect.com
Wed Mar 2 02:10:17 CST 2011



How about a whole PDP11 including the IDE interface?


http://www.heeltoe.com/download/pdp11/README.html

Regards 
 
Rod Smallwood
 
 


-----Original Message-----
From: cctech-bounces at classiccmp.org [mailto:cctech-bounces at classiccmp.org]
On Behalf Of Andrew Lynch
Sent: 01 March 2011 10:33
To: cctalk at classiccmp.org
Subject: RE: MFM to IDE was RE SCSI -1 to IDE and SD project


Hi Ian, please note I said 'feasible'.  Given enough effort and money I am
confident that it is possible to build an MFM to IDE adapter.  However, I do
not think it is feasible as a hobbyist project.  I may be wrong and maybe
someone will produce such a device.  I look forward to seeing it if and when
it happens.


Thanks and have a nice day!

Andrew Lynch


 


 


MFM to IDE was: RE: SCSI -1 to IDE and SD project

Mr Ian Primus ian_primus
<mailto:cctalk%40classiccmp.org?Subject=Re%3A%20MFM%20to%20IDE%20was%3A%20RE
%3A%20SCSI%20-1%20to%20IDE%20and%20SD%20project&In-Reply-To=%3C511826.97503.
qm%40web121606.mail.ne1.yahoo.com%3E> at yahoo.com 
Mon Feb 28 15:05:22 CST 2011 


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  _____  

On the subject of disk interface converters, I do believe an MFM to IDE
bridge to be possible. Philip Pemberton has already proven it's possible to
interface an MFM type device to a modern microcontroller - albiet the other
way around, with his DiskFerret project. The MFM interface is very different
from SCSI and IDE, true, but with modern microcontrollers, the data rate
should be achievable.



Sure, the MFM interface is primitive. You've got the analog-ish data stream
from the disk and some stepper motor drive signals, but you can translate
those with a microcontroller, have it request the block from the IDE device,
buffer it, and stream it out to the host. I think it's doable. Just, more
complicated than, say, SCSI to IDE.



SCSI to IDE is a great project, but at least, for me, I've got plenty of
SCSI drives. In fact, I probably have more SCSI disks than IDE. MFM, not so
much.



-Ian
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