Specifications

CARROLL TOUCH Appendix C - TAPI Function Reference
Touch System Programmer’s Guide C-3
CheckForReports (3)
Description
If any reports are available from the touch system, the number of bytes
available for transfer to the report buffer is returned in CX. This
function is similar to GetReports (2), but does not transfer any reports.
Call with
AX = 3 (function number).
Returns
AX = 3 (function number).
CX = Number of bytes available for transfer to the report
buffer.
0 = No reports available - no bytes transferred.
nonzero = Reports were available - number of bytes
available for transfer to the buffer.
Notes
The application program may use this function to poll the driver to
determine if any reports are available.
The SBC driver does not return the number of bytes available in CX. If
no report bytes are available, CX is 0. If report bytes are available, CX
is FFH.