Sound-Library-291

SB_Init

• Description:
  Attempts to Initialize the sound card
• Inputs:
  None.
• Outputs:
  CF=1 on installation failure.
  SB_BaseAddr, SB_IRQ, SB_DMA_Low set appropriately.
  ISR installed.

SB_Clean

• Description:
  Resets ISR, PIC, etc. to original values.
  Must be called before exit if SB_Init called successfully
• Inputs:
  None.
• Outputs:
  None.

SB_Play

• Description:
  Programs DMA and DSP to play from specified buffer.
• Inputs:
  ax = offset of buffer (relative to page)
  bh = 1 for autoinit (sound bigger than buffer) OR
  bh = 0 for single cycle (sound fits in buffer).
  bl = page of buffer
  cx = length of buffer
  dx = number of bytes until callback called
• Outputs:
  Sound via DSP.

SB_SingleCycle

• Description:
  Switches from AutoInit to Single Cycle. Used for playing the last smaller than buffer amount of sound.
• Inputs:
  cx = bytes remaining for last cycle.
• Outputs:
  None.

SB_SetCallback

• Description:
  Sets a callback for the ISR to call.
• Inputs:
  es = segment of callback procedure.
  bx = offset of callback procedure.
  Note: Specify 0000:0000 for no callback.
• Outputs:
  None.

SB_Stop

• Description:
  Stops any currently playing sound.
• Inputs:
  None.
• Outputs:
  None.