PortWrite

cCall [pPortWrite], <hPort, <OFFSET32 achBuffer> \
    cchRequested, <OFFSET32 cchWritten>>
or      eax, eax
jz      error_handler
 

Called by the _VCOMM_WriteComm service to write characters to the transmit queue for the specified port. Uses the C calling convention. Must be callable at interrupt time.

hPort
Address of a _PORTINFORMATION structure returned by the PortOpen function.
achBuffer
Address of an array of characters to write.
cchRequested
Number of characters to write.
cchWritten
Address of a 32-bit variable that receives the number of characters actually written.

See Also

_PORTINFORMATION, PortOpen, _VCOMM_WriteComm