This is core MAME code but no one on mametesters is doing 64-bit work yet. I hope someone here can shed some light on this first.
There are a number of games that work fine in 32-bit X86 xmame, but crash on 64-bit amd64 xmame regardless of gcc version or setting. This also has nothing to do with ASM or DRC. I started looking at stunrun and have documented my efforts so far here: http://www.anthrofox.org/code/mame/64bitclean/index.html stunrun will segfault during attract mode on X86-64 right when the car hits the yellow plate. The dirty ugly disgusting hack patch I have on the URL above actually gets around this segfault. The problem is src/sound/ym2151.c. And the behavior is interesting. 1. This line: INT32 mod_ind = PSG->lfp; /* -128..+127 (8bits signed) */ often goes below -200! 2. Is UINT32 supposed to clamp mod_ind to zero? Because for whatever reason it does not work on X86-64! UINT32 kc_channel = op->kc_i + mod_ind; Here, kc_channel becomes negative and causes an out-of-bounds access later on. Details are on the link above. Can someone else help with this before I beg mametesters to look at 64-bit updates again? I'd like to know the right thing to do in this code before giving them a dirty patch. Thanks! __________________________________ Do you Yahoo!? Yahoo! Mail Address AutoComplete - You start. We finish. http://promotions.yahoo.com/new_mail _______________________________________________ Xmame mailing list [EMAIL PROTECTED] http://toybox.twisted.org.uk/mailman/listinfo/xmame
