fn + F1 AND F4 for BSL entry, not F1 OR F4

Check for F keys was only requiring one of F1 or F4 to be pressed..

README.org

@@ -84,7 +84,7 @@ patching, and then flash the patched firmware back to the Novatouch.
 The patches done by default are:
 - Replace caps-lock with ctrl
 - Switch place of the 'backspace' and \ keys
-- Add hook function for entering BSL (bootloader) mode with fn + F1 + F2
+- Add hook function for entering BSL (bootloader) mode with fn + F1 + F4
 
 Edit the patch.py file to do other key mappings, hopefully it's
 understandable with the overly commented code.

patch.py

@@ -99,9 +99,9 @@ def original_fw_valid(path):
         return m.hexdigest() == orig_fw_md5
 
 def write_jump_to_bsl():
-    '''Make fn + F1 + F2 jump to BSL (firmware update mode)'''
+    '''Make fn + F1 + F4 jump to BSL (firmware update mode)'''
     # Replace mov instruction with a call to our own code for checking
-    # which F keys are currently pressed. If fn + F1 + F2 is pressed
+    # which F keys are currently pressed. If fn + F1 + F4 is pressed
     # jump to 0x1000 (BSL entry addr).
 
     # bytecode for asm 'call 0xa780; nop'

shellcode/enter_bsl.c

@@ -13,7 +13,7 @@ void check_bsl_enter() {
     *num_for_7x_c1 = *repeat_rate;
 
     // Enter BSL if fn + f1 + f4 is pressed
-    if (*repeat_flags & 0x9) {
+    if ((*repeat_flags & 0x9) == 0x09) {
         __dint();
         // Maybe need to slow down clock to 8 MHz also, not sure what
         // is configured by Novatouch fw