Trying to play sounds in a kernel current as of last night gets me a
panic. Summarized from ddb:

panic: _isa_dmastart: no DMA map for chan1
_Debugger()
_panic()
__isa_dmastart()
_gusdmaout()
_gus_dma_output()
_gusmax_dma_output()
_audiostartp()
_audio_write()
_audiowrite()
_spec_write()
_ufsspec_write()
_vn_write()
_dofile_write()
_sys_write()
_syscall()
syscall (number 4)