Re: [uCsimm] IDE interface?

From: Sebastian Andersson (
Date: Thu Jul 06 2000 - 04:08:19 EDT

On Thu, Jul 06, 2000 at 09:34:58AM +0200, Håvard Tørring wrote:
> The upper 8 bits of the 16 bit data bus are only used for data transfers.
> If you drop them you will simply end up with throwing away half of the disk
> space by storing 256B per sector instead of 512B. For many applications
> this would be just fine.

The ATA specification says the devices can be configured to do 8 bit
transfers by sending a command to the drive.

It doens't work for old IDE interfaces of course.

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