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Here's a quick guide to upgrading your TL866 programmer from the CS version to the A version.   
This operation enables use of the ICSP port (which is easily soldered in). 
  
 
  
1: Install the Programmer's software in C:\MiniPro (I used the current version included in the .zip). 
2: Plug in Programmer (hope you c[/hide]hose to install the USB driver in the above step). 
3: Run Programmer Software and look at the very bottom line. It should show your version TL866CS. 
4: Exit back to Desktop. 
5: Run the TL866.exe program. 
6: Click the browse button [...] and browse for your update.dat file in C:\MiniPro. 
7: Select the "Firmware Dumper" button, and hit the "Reflash" button 
8: Click "Advanced", then select "A Bootloader", then hit "Write" 
9: Unselect "Code protection bit", then hit "Write" 
A: Hit OK to exit that menu, then select "TL866A firmware" and hit "Reflash" 
B: When reflash is done, hit "Reset", wait, and hit "Reset" again. 
C: Exit the TL866.exe program. 
D: Run Programmer software again, look at bottom line. It should say TL866A. 
E: Have fun  
  
Please note that I performed the above steps while I was typing this,  
so I am quite certain everything is correct. 
  
Edit: There are some confirmation prompts that I skipped here because they're obvious.  
Just say "Yes" or "OK" on all such prompts. 
 
 
 
 
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