diff --git a/mandel.s b/mandel.s
index 526953a..317e3b1 100644
--- a/mandel.s
+++ b/mandel.s
@@ -33,8 +33,7 @@ chroma_ticks    = $bd ; u8
 count_frames    = $be ; u8
 count_pixels    = $bf ; u8
 
-total_pixels    = $c0 ; float48
-total_ms        = $c6 ; float48
+; free space c0-cb
 temp            = $cc ; u16
 temp2           = $ce ; u16
 
@@ -63,6 +62,7 @@ FADD   = $DA66 ; ADDITION       (FR0 += FR1)
 FSUB   = $DA60 ; SUBTRACTION    (FR0 -= FR1)
 FMUL   = $DADB ; MULTIPLICATION (FR0 *= FR1)
 FDIV   = $DB28 ; DIVISION       (FR0 /= FR1)
+ZFR0   = $DA44 ; clear FR0
 ZF1    = $DA46 ; CLEAR ZERO PAGE FLOATING POINT NUMBER (XX)
 FLD0R  = $DD89 ; LOAD FR0 WITH FLOATING POINT NUMBER (YYXX)
 FLD1R  = $DD98 ; LOAD FR1 WITH FLOATING POINT NUMBER (YYXX)
@@ -203,6 +203,16 @@ ms_per_frame: ; float48 16.66666667
     .byte $66
     .byte $67
 
+total_pixels: ; float48
+    .repeat 6
+        .byte 0
+    .endrepeat
+
+total_ms: ; float48
+    .repeat 6
+        .byte 0
+    .endrepeat
+
 display_list_start:
     ; 24 lines overscan
     .repeat 3
@@ -1565,10 +1575,13 @@ main_loop:
     sta count_pixels
 
     ; total_ms = 0.0; total_pixels = 0.0
-    ldx #total_ms
-    jsr ZF1
-    ldx #total_pixels
-    jsr ZF1
+    jsr ZFR0
+    ldx #.lobyte(total_ms)
+    ldy #.hibyte(total_ms)
+    jsr FST0R
+    ldx #.lobyte(total_pixels)
+    ldy #.hibyte(total_pixels)
+    jsr FST0R
 
     jsr clear_screen
     jsr status_bar
@@ -1691,19 +1704,19 @@ update_status:
     jsr FMUL
 
     ; FR0 += total_ms
-    ldx #total_ms
-    ldy #0
+    ldx #.lobyte(total_ms)
+    ldy #.hibyte(total_ms)
     jsr FLD1R
     jsr FADD
 
     ; total_ms = FR0
-    ldx #total_ms
-    ldy #0
+    ldx #.lobyte(total_ms)
+    ldy #.hibyte(total_ms)
     jsr FST0R
 
     ; FR0 /= total_pixels
-    ldx #total_pixels
-    ldy #0
+    ldx #.lobyte(total_pixels)
+    ldy #.hibyte(total_pixels)
     jsr FLD1R
     jsr FDIV