vSR_OUT
#define ADB_SET_SR_INPUT() via_reg(VIA1, vACR) &= ~vSR_OUT
#define ADB_SET_SR_OUTPUT() via_reg(VIA1, vACR) |= vSR_OUT
via_reg(VIA1, vACR) &= ~vSR_OUT; /* make sure SR is set
via_reg(VIA1, vACR) &= ~vSR_OUT; /* make sure SR is set
via_reg(VIA1, vACR) &= ~vSR_OUT; /* make sure SR is set
#define ADB_SET_SR_INPUT() via_reg_and(VIA1, vACR, ~vSR_OUT)
#define ADB_SET_SR_OUTPUT() via_reg_or(VIA1, vACR, vSR_OUT)
via_reg_and(VIA1, vACR, ~vSR_OUT); /* make sure SR is set
reg &= ~vSR_OUT; /* make sure SR is set to IN */
reg &= ~vSR_OUT;
reg |= vSR_OUT;
reg &= ~vSR_OUT;
reg |= vSR_OUT;