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

[Robert <binarysystems@coosahs.net>]

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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