JQS_wHead
while (wTmp == readw(chip->DARQ + JQS_wHead) && timeout--)
while (DAPQ_tail != readw(chip->DAPQ + JQS_wHead) || start) {
writew(PCTODSP_OFFSET(0 * DAQDS__size), chip->DAPQ + JQS_wHead);
writew(PCTODSP_OFFSET(0 * DAQDS__size), chip->DARQ + JQS_wHead);
writew(0, base + JQS_wHead);
head = readw(chip->DSPQ + JQS_wHead);
writew(head, chip->DSPQ + JQS_wHead);