RE: [oc] Floppy disk controller inside schematics wanted !

[gasser_jerome@hotmail.com]

Please do you know how to find vhdl cores about fdc controller

----- Original Message ----- 
From: Robert <binarysystems@c... > 
To: cores@o...  
Date: Sat, 13 Apr 2002 18:17:16 +0200 
Subject: RE: [oc] Floppy disk controller inside schematics wanted ! 

> 
> 
> I would like to see VHDL cores for the Western Digital WD177x,179x 
> and 
> 279x series of FDC's. Anyone know of any....? 
> 
> ----- Original Message ----- 
> From: "Paul McFeeters" <paul.mcfeeters@n... > 
> To: <cores@o... > 
> Date: Fri, 7 Dec 2001 16:22:17 -0000 
> Subject: RE: [oc] Floppy disk controller inside schematics wanted ! 
> 
> > 
> > 
> > Jean, 
> > 
> > if you post the web address for the FDC details you get then 
> > anybody who 
> > wishes to help out can look at them. That way you may get some 
> of 
> > the best 
> > VHDL brains around help you with your problem. Isn't that why 
> > opencores is 
> > here? So we can help each other out? 
> > 
> > Paul McFeeters 
> > 
> > -----Original Message----- 
> > From: owner-cores@o... 
> > [mailto:owner-cores@o... ]On 
> > Behalf Of Jean Masson 
> > Sent: 07 December 2001 12:30 
> > To: cores@o... 
> > Subject: Re: [oc] Floppy disk controller inside schematics 
> wanted ! 
> > 
> > 
> > Hello Rob, 
> > 
> > Thank you for your help. I have found some informations of 
> inside 
> > of floppy 
> > controller, in 2 
> > applications 
> > notes of National Semiconductors and a data sheet from Intel. 
> This 
> > is mainly 
> > block diagrams, but 
> > they are 
> > helpful for understanding process and for comportemental VHDL 
> > synthesis. 
> > With more detailed 
> > schematics, 
> > one could hope to do structural or data flow architectures. 
> The 
> > ideal should 
> > be finding of a 
> > lecture book 
> > with 'theory' of FDC and inside schematics. 
> > 
> > Basicaly, FDC is a serial-parallel-serial unit. Building 
> blocks for 
> > serial-parallel and reverse are 
> > given by Triscend 
> > dev pack. Problem remains with stuffs like data separator and 
> clock 
> > extraction, wich are not 
> > trivial things. 
> > 
> > This is a shame that simple FDC are discontinued by industry. 
> Combi 
> > chips 
> > are too complex to 
> > implement with 
> > a 8051 core, wich need only one floppy interface. Worst, they 
> are 
> > SMD 
> > components, wich is 
> > problematic for 
> > institutions without industrial soldering equipment. I think 
> not to 
> > be the 
> > only guy in universe in 
> > search of an answer 
> > for lack of simple FDC chips available. 
> > 
> > I use a Triscend E5 CSoC card produced by Xess, an interesting 
> and 
> > proteiform concept. Principle of 
> > do-it-yourself 
> > interfaces for a microcontroller is one of the few good ideas 
> of 
> > last years. 
> > 
> > My e-mail adress is : 
> > 
> > jean.masson@l... 
> > 
> > Best regards, 
> > 
> > Jean MASSON 
> > 
> 
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