diff --git a/system/keypad.s65 b/system/keypad.s65
index a87d5c5..67f0b18 100644
--- a/system/keypad.s65
+++ b/system/keypad.s65
@@ -18,7 +18,7 @@ INCLUDE_KEYPAD = 1
 
 
 RBUF_MEM_START = $200
-RBUF_MEM_END = $2ff
+RBUF_MEM_END = $208
 .define RBUF_NAME "keypad"
 .include "buffer.s65"
 
@@ -61,16 +61,15 @@ KB_VAR      = $05  ; any free zp address
     ldx #$00
     jsr @kp_read_column
     lda #%00001101
-    ldx #$04
+    ldx #$08
     jsr @kp_read_column
     lda #%00001011
-    ldx #$08
+    ldx #$04
     jsr @kp_read_column
     lda #%00000111
     ldx #$0c
     jsr @kp_read_column
     stz KP_IO+IO::RB  ; todo why all zero?
-    ; lda KP_IO+IO::RB  ; read to definetly clear the interrupt flag
     rts
 @kp_read_column:
     sta KP_IO+IO::RB