Re: [oc] cloning of processors

[Armando Astarloa <jtpascua@bi.ehu.es>]

At 13:20 23/11/2002 -0100, you wrote:
> Hi,
>
> I want to read/write data from Hard disk into the host.
> I am using IDE interface for this. Host is Coldfire.(Motorola
> Amadeus).
> After I configured the processor for IDE. 
>
> As per the standard of IDE, ATA-3  to read data from harddisk, I
> wrote 
> the proper command into IDE command register after proper 
> configuration.
> IDE should send interrupt to host when data becomes ready.
> Now PROBLEM for me is IDE is not sending any interrupt. But data on IDE
> side is getting ready. If I read data on IDE side after certain time,
> data 
> whatever I am reading into host from IDE is correct.
>
> But I want to read after interrupt comes only as I don't want to waste
> my processor time by pending on interrupt. 
> Can anyone answer this what should I do to get interrupt from IDE??

The interrupt must be enabled on bit 1 (/IEN=0) of the control register .
For sector data read/write also DRQ of the status register must take in
care :

NOT_READY : BSY=1
COMMAND_ALLOW : BSY=0 DRDY=1
TRANSFER_ALLOW : BSY=0 DRDY=1 DRQ=1

Armando

> regards
> Mallika
>
>
> ----- Original Message ----- 
> From: Mark Bonnici <mbonnici@r... > 
> To: <cores@o... > 
> Date: Fri, 10 Aug 2001 14:48:30 +0200 
> Subject: [oc] cloning of processors 
>
> > 
> > 
> > Hello all 
> > 
> >    i think that cloning of processors should be
> possible. 
> > Now we are moving towards cloning verything (even persons) 
> > -so why should we not clone digital processors from documentation
> > which is freely available? 
> > 
> > Mark 
> > -- 
> > 
> --
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Armando Astarloa Cuéllar - Universidad del Pais Vasco UPV/EHU
Tecnología Electrónica
Departamento de Electrónica y Telecomunicaciones
Escuela Superior de Ingenieros - Email: jtpascua@bi.ehu.es
Ald. de Urquijo s/n Tel.: 34 - 94 - 601 73 04
48013 BILBAO (SPAIN) Fax.: 34 - 94 - 601 42 59
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