Re: sd2iec ported to petSD

From: Nils Eilers <>
Date: Mon, 30 May 2011 19:24:04 +0200
Message-Id: <>
> Hallo Nils,

I'm the intended recipient, so I guess I'm allowed to answer but not to quote...

There are different ways, but selfmade solutions usually use the SPI-bus to communicate with the SD-card. That's a 3-wire-serial bus with a clock line driven by the bus master, and MOSI (master out slave in) + MISO (master in slave out) data lines. SD-cards operate at 3.6V max so you'll need a voltage conversion 3.3V <--> 5V if you want to connect it to a 6522.

You could do that serial stuff in 6502 assembler (I know sb who made a SD-card interface for a LPT-port and uses it with Z80 assembler in software), but it gets very slow.

sd2iec is free software, GPL licenced.

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Received on 2011-05-30 18:00:19

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