Int 61 Fn 0E  - Pc/tcp Kernel V2.05+ - "net_select" - Detect Readiness Of  [N]

   AH = 0Eh
   BX = maximum value of network descriptor for which to return info
   DS:DX -> 32-bit (max) array of bit flags for read readiness
   ES:DI -> 32-bit (max) array of bit flags for write readiness

Return: CF clear
Range: INT 20 to INT E0, selected by configuration

Notes: bits in the DS:DX buffer are set if the corresponding network
     descriptor may be read without blocking; bits in the ES:DI buffer
     are set if the corresponding network descriptor may be written
     without blocking.  This implies that the network descriptor has
     opened correctly and the protocol initialized.
   the installation check consists of testing for the signature "TCPTSR"
     three bytes beyond the start of the interrupt handler

See Also: INT 61"FTP Software",INT 61/AH=00h"PC/TCP"