GA_DMAA_REG
sscape_write_unsafe(s->io_base, GA_DMAA_REG, val);
sscape_start_dma_unsafe(s->io_base, GA_DMAA_REG);
if (!sscape_wait_dma_unsafe(s->io_base, GA_DMAA_REG, 5000)) {
sscape_write(s, GA_DMAA_REG, (s->ic_type == IC_OPUS ? 0x40 : 0x70));
sscape_write_unsafe(sscape->io_base, GA_DMAA_REG, dma_cfg);