SSR
if ((SSR & SS_BUSY) != 0)
if (SSR & SS_IREQUEST)
if (SSR & SS_IREQUEST) {
while ((SSR & SS_DREG_FULL) != 0)
a = SSR;
a = SSR;
a = SSR;
a = SSR;
while (((ints = SSR) & SS_IREQUEST) == 0)
ints = SSR;
while (SSR & SS_IREQUEST) {
if (SSR & SS_IREQUEST)
if (SSR & 0x40) {
SSR, r, NSR, SCR);
while (SSR & SS_IREQUEST) {
while (!(SSR & SS_IREQUEST))
while (!(SSR&SS_IREQUEST))
if (SSR & SS_IREQUEST)