Revert "more work on MEGA65 keyboard scanner"

This reverts commit 7918ef55b9.

src/aliases/,aliases_hardware_m65.s

@@ -32,7 +32,6 @@
 	!addr C65_EXTKEYS_PR  = $D607
 	!addr C65_EXTKEYS_DDR = $D608
 
-	!addr KBSCN_KEYCODE   = $D610	
 	!addr KBSCN_BUCKY     = $D611	
 	!addr KBSCN_PEEK      = $D613
 	!addr KBSCN_SELECT    = $D614

src/aliases/,aliases_ram_lowmem_m65.s

@@ -53,7 +53,10 @@
 	!addr M65_TXTWIN_Y1    = $591 ;            text window - bottom-right Y coordinate + 1
 	!addr M65_TXTROW_OFF   = $592 ; $592-$593  offset to the current text row from the viewport start
 	!addr M65_SCRCOLMAX    = $594 ;            maximum allowed column
-	                              ; $595-$5EB  -- UNUSED --
+	!addr M65_KB_BUCKY     = $595 ;            result of bucky keys scan
+	!addr M65_KB_COLSCAN   = $596 ; $596-$59E  results of keyboard scan, columns 0-8
+
+	                              ; $59F-$5EB  -- UNUSED --
 	!addr M65_DMAGIC_LIST  = $5F1 ; $5EF-$5FF  reserved for DMAgic list, 15 bytes (modulo bytes are not needed)
 	!addr M65_RS232_INBUF  = $600 ; $600-$6FF  -- reserved for RS-232 input buffer --
 	!addr M65_RS232_OUTBUF = $700 ; $700-$7FF  -- reserved for RS-232 output buffer --