VXP_DLG_DMAREAD_SEL_MASK
chip->regDIALOG |= do_write ? VXP_DLG_DMAWRITE_SEL_MASK : VXP_DLG_DMAREAD_SEL_MASK;
VXP_DLG_DMAREAD_SEL_MASK|
pchip->regDIALOG &= ~VXP_DLG_DMAREAD_SEL_MASK;