diff --git a/mandel-core.s b/mandel-core.s
index 5080d7e..eefd557 100644
--- a/mandel-core.s
+++ b/mandel-core.s
@@ -819,10 +819,10 @@ arg2_pos:
     rts ; 6 cyc
 .endmacro
 
-; min base ram: 19 * 2 + 81 + 28 * 2 + 6 = 181
-; max base ram: 19 * 2 + 92 + 28 * 2 + 6 = 192
-; min ext ram: 19 * 2 + 51 + 28 * 2 + 6 = 151
-; max ext ram: 19 * 2 + 70 + 28 * 2 + 6 = 170
+; min base ram: 5 + 19 * 2 + 81 + 28 * 2 + 6 = 186
+; max base ram: 23 + 19 * 2 + 92 + 28 * 2 + 6 = 215
+; min ext ram: 5 + 19 * 2 + 51 + 28 * 2 + 6 = 156
+; max ext ram: 23 + 19 * 2 + 70 + 28 * 2 + 6 = 193
 .macro sqr16_impl xe
     .scope
         arg = FR0    ; 16-bit arg (clobbered)
@@ -830,6 +830,7 @@ arg2_pos:
         ;inter = temp2
         inter = FR1
 
+        ; 5-23 cycles
         lda arg + 1  ; 3 cyc
         bpl arg_pos  ; 2 cyc
         neg16 arg    ; 18 cyc