Int 2F Fn CD01  R - Interwave Game Api - Get Number Of Interwave Programs  [s]

   AX = CD01h
   BX = 0000h

Return: BX = number of programs currently installed on the Game API
Desc:  get the number of programs supporting the InterWave Game API which are
     currently installed in memory, which also forms the next program ID
     number if the caller wishes to go resident on the API
Range: AH=CDh-ECh, selected by scanning for an available multiplex number

Notes: the first program to install on the IW Game API must use ID 00h
   the AMD-recommended implementation is for the handler to increment
     BX and chain to the previous handler (if any), but this will fail
     if TSRs are unloaded out-of-order

See Also: AX=CD00h"InterWave",AX=CD02h"InterWave",AX=CD03h"InterWave"

See Also: AX=CD05h"InterWave",AX=CD21h"InterWave",AX=CD80h"InterWave"