diff --git a/chipty5-64.asm b/chipty5-64.asm
index aa2c98f..f0d2633 100644
--- a/chipty5-64.asm
+++ b/chipty5-64.asm
@@ -46,14 +46,14 @@ handler
                         tax
                         cmp prevkey
                         beq dotick
-                        cmp #3 ; F7: reset
+                        cmp #0 ; backspace: Power cycle (reset) the vm
                         bne +
                         lda #EF_RESET
                         ora eflags
                         sta eflags
                         jmp done
 +                       txa
-                        cmp #6 ; F5: Pause
+                        cmp #41 ; P: Pause
                         bne +
                         lda #EF_PAUSE
                         eor eflags
@@ -67,14 +67,14 @@ handler
                         sta eflags
                         jmp done
 +                       txa
-                        cmp #43 ; -: Shift behaviour
+                        cmp #55 ; /: Shift behaviour
                         bne +
                         lda #EF_SHIFTX
                         eor eflags
                         sta eflags
                         jmp done
 +                       txa
-                        cmp #55 ; /: Load
+                        cmp #42 ; L: Load
                         bne +
                         lda #EF_LOAD
                         ora eflags
@@ -227,4 +227,4 @@ prompt                  .null "file name: "
 kbdcodes                .byte 56, 59, 8, 11, 62, 9, 14, 17, 10, 13, 18, 21, 12, 23, 20, 31
             .endsection data
 
-; vim: syntax=64tass
\ No newline at end of file
+; vim: syntax=64tass
diff --git a/chipty5-pet40.asm b/chipty5-pet40.asm
index c14ae56..1fc71c0 100644
--- a/chipty5-pet40.asm
+++ b/chipty5-pet40.asm
@@ -56,7 +56,7 @@ handler
                         sta eflags
                         jmp done
 +                       txa
-                        cmp #'.' ; '.'': Pause
+                        cmp #'p' ; P: Pause
                         bne +
                         lda #EF_PAUSE
                         eor eflags
@@ -70,14 +70,14 @@ handler
                         sta eflags
                         jmp done
 +                       txa
-                        cmp #"-" ; -: Shift behaviour
+                        cmp #'/' ; /: Shift behaviour
                         bne +
                         lda #EF_SHIFTX
                         eor eflags
                         sta eflags
                         jmp done
 +                       txa
-                        cmp #'/' ; '/': Load
+                        cmp #'l' ; L: Load
                         bne +
                         lda #EF_LOAD
                         ora eflags
@@ -234,4 +234,4 @@ prompt                  .null "file name: "
 kbdcodes                .text "1234qwerasdfzxcv"
             .endsection data
 
-; vim: syntax=64tass
\ No newline at end of file
+; vim: syntax=64tass
diff --git a/chipty5-plus4.asm b/chipty5-plus4.asm
index ec8834e..d9ea901 100644
--- a/chipty5-plus4.asm
+++ b/chipty5-plus4.asm
@@ -46,14 +46,14 @@ handler
                         tax
                         cmp prevkey
                         beq dotick
-                        cmp #3 ; F7: reset
+                        cmp #0 ; backspace: power cycle (reset) the vm
                         bne +
                         lda #EF_RESET
                         ora eflags
                         sta eflags
                         jmp done
 +                       txa
-                        cmp #6 ; F5: Pause
+                        cmp #41 ; P: Pause
                         bne +
                         lda #EF_PAUSE
                         eor eflags
@@ -67,14 +67,14 @@ handler
                         sta eflags
                         jmp done
 +                       txa
-                        cmp #46 ; -: Shift behaviour
+                        cmp #55 ; /: Shift behaviour
                         bne +
                         lda #EF_SHIFTX
                         eor eflags
                         sta eflags
                         jmp done
 +                       txa
-                        cmp #55 ; /: Load
+                        cmp #42 ; L: Load program
                         bne +
                         lda #EF_LOAD
                         ora eflags
@@ -227,4 +227,4 @@ prompt                  .null "file name: "
 kbdcodes                .byte 56, 59, 8, 11, 62, 9, 14, 17, 10, 13, 18, 21, 12, 23, 20, 31
             .endsection data
 
-; vim: syntax=64tass
\ No newline at end of file
+; vim: syntax=64tass