diff --git a/imul8xe.s b/imul8xe.s
index d12f53f..15adf64 100644
--- a/imul8xe.s
+++ b/imul8xe.s
@@ -12,6 +12,7 @@ bankswitch:
     .endrepeat
 
 ; 58-77 cycles
+; clobbers x, y, dest to dest + 3
 .macro imul8xe dest, arg1, arg2
 .local done
 .local output
@@ -54,10 +55,10 @@ bankswitch:
 
     ; check that 1 bit we skipped to fit into space
     lda arg1     ; 3 cyc
-    and $#1      ; 2 cyc
+    and #1       ; 2 cyc
     beq done     ; 2 cyc
 
-    ; add the second param one last tie for the skipped bit
+    ; add the second param one last time for the skipped bit
     clc          ; 2 cyc
     lda arg2     ; 3 cyc
     adc output   ; 3 cyc