CMD_ATTN
(BASE_CMD & ~CMD_INTR) | CMD_DRVR_ENABLE | CMD_SEL | CMD_ATTN;
CONTROL = (BASE_CMD & ~CMD_INTR) | CMD_DRVR_ENABLE | CMD_ATTN;
CONTROL = BASE_CMD | CMD_ATTN;
CONTROL = BASE_CMD | CMD_ATTN;
CONTROL = BASE_CMD | CMD_ATTN;