Quote Originally Posted by arie View Post
I read the datasheet for the dosonchip, but how do you read and write data from the sd chip\?

Do you need to tell which memory adress you want to write or read or is this done automatically with hserin hserout?

i use pic basic pro
I use PicBasicPro too...imagine that...
No, you don't tell which memory address to read/write from.
This chip is a DOS on CHIP. Disk Operating System On A Chip.
It's an interface chip, a 'relatively' seamless interface chip.
With it, you can treat the SD card just like you would treat a floppy disk (or maybe a small hard drive) from a DOS command prompt. Ok, it's a bit more complicated than that, but not by much.

If this is your first project...whew...don't get me started...
If it actually is your first project...I'd back up, WAY up, and make an LED blink first.
If it isn't your first time around the block, then it really shouldn't be that hard, unless you haven't really read the datasheet (which explains everything you really need to know as long as you really READ it), or maybe you haven't messed with the serial port before, in which case, I say again, You'd better back WAY up, and make something simple first, like PC to PIC communications.