(gdb) bt
#0 0x02019cfd in emu_timer::machine (this=0x0) at src/emu/schedule.h:100
#1 0x0166ae36 in emu_timer::adjust (this=0x0, start_delay=..., param=0, period=...)
      at src/emu/schedule.c:209
#2 0x00a1be1c in pcjr_set_keyb_int (machine=..., state=1)
       at src/mess/machine/pc.c:638
#3 0x00f26ca8 in pc_keyboard () at src/mame/machine/pcshare.c:140
#4 0x00a1e0f6 in pc_state::pcjr_frame_interrupt (this=0x271a3c, timer=..., ptr=0x0, param=256)
      at src/mess/machine/pc.c:1551
#5 0x02009aef in delegate_base<void, timer_device&, void*, int, _noparam, _noparam>::operator() (this=0x2672e8, p1=..., p2=0x0, p3=256)
      at src/emu/delegate.h:542
#6 0x0166f292 in timer_device::device_timer (this=0x26701c, timer=..., id=0, param=0, ptr=0x0)
      at src/emu/timer.c:305
#7 0x01f9d4f0 in device_t::timer_expired (this=0x26701c, timer=..., id=0, param=0, ptr=0x0)
      at src/emu/device.h:231
#8 0x0166cf76 in device_scheduler::execute_timers (this=0x22f250)
      at src/emu/schedule.c:910
#9 0x0166bc4f in device_scheduler::timeslice (this=0x22f250)
      at src/emu/schedule.c:429
#10 0x01681891 in running_machine::run (this=0x22c328, firstrun=true)
        at src/emu/machine.c:393
#11 0x015aedde in mame_execute (options=..., osd=...) at src/emu/mame.c:190
#12 0x017b9f86 in cli_frontend::execute (this=0x22fe7c, argc=6, argv=0x3f4cd8)
        at src/emu/clifront.c:254
#13 0x010041c4 in utf8_main (argc=6, argv=0x3f4cd8)
        at src/osd/windows/winmain.c:482
#14 0x019dd53e in wmain (argc=6, argv=0x3f49c0) at src/osd/windows/main.c:82
#15 0x0040140b in __tmainCRTStartup ()
        at /home/ruben/mingw-w64/src/mingw-w64/mingw-w64-crt/crt/crtexe.c:310
#16 0x7c817077 in RegisterWaitForInputIdle ()
        from C:\WINDOWS\system32\kernel32.dll
#17 0x00000000 in ?? ()