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Diffstat (limited to 'conio/mul40.s')
| -rw-r--r-- | conio/mul40.s | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/conio/mul40.s b/conio/mul40.s new file mode 100644 index 0000000..99dd006 --- /dev/null +++ b/conio/mul40.s @@ -0,0 +1,20 @@ +; Compatibility wrapper for cc65's mul40 or _mul40 library routine. +; Necessary because cc65 <= 2.17 has "mul40" as part of its atari +; library, but 2.18 and up made it a C-callable routine on all +; platforms, meaning its name grew a _ in front, "_mul40". + +; The .VERSION pseudo-variable is documented as "major version +; times $100, plus minor version times $10". Whoever came up with +; this design must have thought the minor version would never exceed +; 15... starting with 2.16, the minor nybble overflows into the major +; one, meaning cc65-2.17's .VERSION is actually $0310. Which is fine, +; so long as there's never a cc65 major version 3.x (if this happens, +; versions 3.0 and 3.1 will fail to build this correctly, then 3.2 +; will work again). + +.if .VERSION <= $0310 ; $0310 == 2.17 + .import mul40 +.else + .import _mul40 +mul40 = _mul40 +.endif |