Re: sd2iec ported to petSD

From: Baltissen, GJPAA (Ruud) <>
Date: Tue, 31 May 2011 08:41:58 +0200
Message-ID: <>
Hallo Nils,

I had two reasons to ask if I could use a 6502:
- I'm not familiar with the Atmels
- I want to use the SD cards in combination with existing drives

Then I suddenly remembered that PCs use a Intel 8042 micro-controller to
communicate with the keyboard and that it can be addressed as an I/O
port. My (obvious) question: can this be done with an Atmel uC as well?
The idea behind it: treat the Atmel/SD-card combination as just another
IC and you can place it in any wellknown Commodore drive. OK, the ROM
has to be changed, but I'm familiar with that because of my harddisk

The advantages for you:
- you don't have to worry about supporting all kind of commands and file
formats (relative files !!!)
- only one program is needed for all drives. 
- I don't see any reason why it can't be used in other computers as

And about communicating with the Atmel, what about using the register
set as used by IDE harddisks? One change: 256 bytes sectors instead of
512 ones for the C= drives.

About using it in other computers: with 512 bytes/sector I can use it to
replace the old MFM drives in my IBM-XT (clones) :)

I'm looking forward to your comment!

    / __|__
   / /  |_/     Groetjes, Ruud
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Received on 2011-05-31 07:00:19

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