How to set the "start position of each new read"?

[elssner]

In register 0x0A I should write a string of characters to change the start position of each new read.

It works, when I write 1 Byte after the command 0x0A. I can change the start position from 0 to 255. But files are bigger.

How to format the "string" with the offset value?

And where comes the "Start Position" command? Before or after the "Read File" command. I have testet both.