fizzbuzz.s: Increment `len' in place rather than via register.

The Z80 isn't a load/store architecture, even though my RISC-programming
habits lead me to treat it like one.

diff --git a/fizzbuzz.s b/fizzbuzz.s
index 6a68e9d940e8c9b046573a07db7304c0e848ae48..76242efd254854ce6a5bcb1cd99a3b2e552027c2 100644 (file)
--- a/fizzbuzz.s
+++ b/fizzbuzz.s
@@ -111,10 +111,9 @@ incr:      ld      a, (hl)
        djnz    incr
 
        ;; Carry out.
        djnz    incr
 
        ;; Carry out.

-       ld      a, (len)

        ld      (hl), 1
        ld      (hl), 1

-       inc     a
-       ld      (len), a
+       ld      hl, len
+       inc     (hl)

        jp      again
 
 squish:
        jp      again
 
 squish: