clean up speed display now uses ms/px msg

mandel.s

@@ -94,7 +94,7 @@ str_self:
     .byte "MANDEL-6502"
 str_self_end:
 str_speed:
-    .byte "ms/px"
+    .byte " ms/px"
 str_speed_end:
 str_run:
     .byte " RUN"
@@ -740,6 +740,25 @@ shift_done:
     rts
 .endproc
 
+.macro draw_text_indirect col, len, strptr
+    ; clobbers A, X
+    .local loop
+    .local done
+    ldx #0
+loop:
+    cpx #len
+    beq done
+    txa
+    tay
+    lda (strptr),y
+    tay
+    lda char_map,y
+    sta textbuffer + col,x
+    inx
+    jmp loop
+done:
+.endmacro
+
 .macro draw_text col, len, cstr
     ; clobbers A, X
     .local loop
@@ -940,33 +959,9 @@ update_status:
     ; convert to ASCII in INBUFF
     jsr FASC
 
-    ; find the last byte
-    ldy #0
-number_loop:
-    lda (INBUFF),y
-    bmi lastchar
-
-    tax
-    lda char_map,x
-    sta textbuffer + speed_start,y
-
-    iny
-    bpl number_loop
-lastchar:
-    ; Y is last char
-    ; trim that high bit
-    and #$7f
-    tax
-    lda char_map,x
-    sta textbuffer + speed_start,y
-
-    ; Fill out any remaining spaces
-    lda #0
-space_loop:
-    iny
-    sta textbuffer + speed_start,y
-    cpy #(20)
-    bmi space_loop
+    ; print the first 6 digits
+    draw_text_indirect speed_start, 6, INBUFF
+    draw_text speed_start + 6, str_speed_len, str_speed
 
 skip_status: