Si570 - 12F683 Psdr rs232 Connection
You do it at your own risk ! You may fry your pic (cheap) and/or your si570 (not cheap).
This program runs in a 12F683 pic plugged into the XTALL board.
The way of connecting the +-15V signal to the PIC on the XTALL board :
I use this design now. Pic Here
Here is the .HEX for the 12f683 and powersdr-sr40 svn 981
It does not have the dipswitch option, all switches must be open.
Here is the asm source
You need to set up Psdr in the following way:
Set the comp-port as primary keyer port in:
Set for Si570 VFO on LPT in :
Setup/Generat/Hardware Config/Softrock VFO Options/Si570 VFO on LPT. lpt adress may be 0.
There is also a small program to set the frequency without psdr. You can get it
Good Luck !