(gdb) run acedrvrw
Starting program: C:\mame/mame.exe acedrvrw

Program received signal SIGSEGV, Segmentation fault.
0x00c79bea in GetPolyData (addr=294975) at src/vidhrdw/namcos22.c:1333
1333            result = (mpPolyH[addr]<<16)|(mpPolyM[addr]<<8)|mpPolyL[addr];

(gdb) bt
#0  0x00c79bea in GetPolyData (addr=294975) at src/vidhrdw/namcos22.c:1333
#1  0x00c7b259 in RegisterNormals (addr=294966, m=0x5a3f640)
    at src/vidhrdw/namcos22.c:2135
#2  0x00c7b537 in BlitQuads (pBitmap=0x5d73d40, addr=294965, m=0x5a3f640,
    base=294) at src/vidhrdw/namcos22.c:2247
#3  0x00c7b5a9 in BlitPolyObject (pBitmap=0x5d73d40, code=294, M=0x5a3f640)
    at src/vidhrdw/namcos22.c:2270
#4  0x00c7b9bb in Handle200002 (bitmap=0x5d73d40, pSource=0x8262388)
    at src/vidhrdw/namcos22.c:2403
#5  0x00c7bbd9 in SimulateSlaveDSP (bitmap=0x5d73d40)
    at src/vidhrdw/namcos22.c:2481
#6  0x00c7bcb7 in DrawPolygons (bitmap=0x5d73d40)
    at src/vidhrdw/namcos22.c:2513
#7  0x00c7c12d in video_update_namcos22 (screen=0, bitmap=0x5d73d40,
    cliprect=0x5a3f700) at src/vidhrdw/namcos22.c:2677
#8  0x004dcc08 in force_partial_update (scanline=479) at src/mame.c:1210
#9  0x004dcc32 in draw_screen () at src/mame.c:1229
#10 0x004dcee7 in updatescreen () at src/mame.c:1370
#11 0x0048b7f7 in cpu_vblankcallback (param=0) at src/cpuexec.c:1961
#12 0x005031a2 in mame_timer_set_global_time (newbase=
      {seconds = 47, subseconds = 230833333332849664}) at src/timer.c:404
#13 0x00489c93 in cpu_timeslice () at src/cpuexec.c:1093
#14 0x00488b21 in cpu_run () at src/cpuexec.c:477
#15 0x004dbce3 in run_machine_core () at src/mame.c:598
#16 0x004dbb82 in run_machine () at src/mame.c:529
#17 0x004db899 in run_game (game=695) at src/mame.c:361
#18 0x00924df3 in main (argc=2, argv=0x5d70500) at src/windows/winmain.c:211
#19 0x004011e7 in _end__ ()
#20 0x00401238 in mainCRTStartup ()
#21 0xbff8b560 in _libwinmm_a_iname ()
#22 0xbff8b412 in _libwinmm_a_iname ()
#23 0xbff89dd5 in _libwinmm_a_iname ()
#24 0x6d5b6d5b in ?? ()
Cannot access memory at address 0x755b757b
(gdb)