Function 52, subfunction 6 - add data to the stack of input queue.
Parameters:
- eax = 52 - function number
- ebx = 6 - subfunction number
- edx = data size
- esi = data pointer
Returned value:
- eax = -1 - error
- eax = 0 - success
Remarks:
- This function is intended only for slow network drivers
(PPP, SLIP).
- Data size must not exceed 1500 bytes, though function
performs no checks on correctness.