implemented UDTIM routine

c64/kernal/scnkey.s

@@ -204,10 +204,6 @@ ReturnNoKeys:
 
 NoActivityDetected:
 
-	;; Cancel STKEY status
-	lda #$FF
-	sta STKEY ; XXX this variable should be set by UDTIM
-
 	;; So cancel all bucky keys
 	lda key_bucky_state
 	sta key_last_bucky_state
@@ -334,12 +330,6 @@ next_row:
 	;; //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 	;; // Check and flag Non Alphanumeric Keys
 
-	;; Store last row of keyboard scan result,
-	;; so that RUN/STOP etc can be checked easily
-	;; (Compute's Mapping the 64, p27)
-	lda ScanResult+0
-	sta STKEY ; XXX this variable should be set by UDTIM
-
 	;; Store de-bounce data for bucky keys
 	;; (Compute's Mapping the 64, p58-59)
 	lda key_bucky_state