SAA1099

Features:

• 6 channel stereo mixers
• 6 frequency generators with 8 octaves per generator, 256 tones per octave.
• 12 amplitude controllers
• 6 noise/freqeuncy mixers
• 2 noise generators
• 2 envelope generators
• capable of outputting 2 independent stereo channels of 3 bit digital output (although the chip has no DMA - sample playback can only be achieved in software or with additional hardware)

The chip can be emulated using SAASound.

More info at http://velesoft.speccy.cz/saa1099-cz.htm

  func	pin	pin   func

   /WR	 1	 18   Vcc
   /CS	 2	 17   D7
    A0	 3	 16   D6
  OutR	 4	 15   D5
  OutL	 5	 14   D4
  Iref	 6	 13   D3
/DTACK	 7	 12   D2
   CLK	 8	 11   D1
   GND	 9	 10   D0


address  function
-------  ----------------
  0	 data to register
  1	 register select

   \bit   7   6   5   4   3   2   1   0
reg.\
	 -------------------------------
 00	|     right     |     left      |  Amplitude channel 0
	 -------------------------------
 01	|     right     |     left      |  Amplitude channel 1
	 -------------------------------
 02	|     right     |     left      |  Amplitude channel 2
	 -------------------------------
 03	|     right     |     left      |  Amplitude channel 3
	 -------------------------------
 04	|     right     |     left      |  Amplitude channel 4
	 -------------------------------
 05	|     right     |     left      |  Amplitude channel 5
	 -------------------------------
 06	| x | x | x | x | x | x | x | x |  Reserved
	 -------------------------------
 07	| x | x | x | x | x | x | x | x |  Reserved
	 -------------------------------
 08	|                               |  Frequency channel 0
	 -------------------------------
 09	|                               |  Frequency channel 1
	 -------------------------------
 0A	|                               |  Frequency channel 2
	 -------------------------------
 0B	|                               |  Frequency channel 3
	 -------------------------------
 0C	|                               |  Frequency channel 4
	 -------------------------------
 0D	|                               |  Frequency channel 5
	 -------------------------------
 0E	| x | x | x | x | x | x | x | x |  Reserved
	 -------------------------------
 0F	| x | x | x | x | x | x | x | x |  Reserved
	 -------------------------------
 10	| x | channel 1 | x | channel 0 |  Octave select
	 -------------------------------
 11	| x | channel 3 | x | channel 2 |  Octave select
	 -------------------------------
 12	| x | channel 5 | x | channel 4 |  Octave select
	 -------------------------------
 13	| x | x | x | x | x | x | x | x |  Reserved
	 -------------------------------
 14	| x | x | 5 | 4 | 3 | 2 | 1 | 0 |  Channel frequency enable
	 -------------------------------
 15	| x | x | 5 | 4 | 3 | 2 | 1 | 0 |  Channel noise enable
	 -------------------------------
 16	| x | x | NG 1  | x | x | NG 0  |   Noise generator
	 -------------------------------
 17	| x | x | x | x | x | x | x | x |
	 -------------------------------
 18	|   | x |   |   |   |   |   |   |   Envelope generator 0
	 -------------------------------
 19	|   | x |   |   |   |   |   |   |   Envelope generator 1
	 -------------------------------
 1A	| x | x | x | x | x | x | x | x |
	 -------------------------------
 1B	| x | x | x | x | x | x | x | x |
	 -------------------------------
 1C	| x | x | x | x | x | x | R |SE |   R=Reset, SE=Sound Enable
	 -------------------------------
 1D	| x | x | x | x | x | x | x | x |
	 -------------------------------
 1E	| x | x | x | x | x | x | x | x |
	 -------------------------------
 1F	| x | x | x | x | x | x | x | x |
	 -------------------------------

Amplitude register  (00h - 05h)
-----------------------------

	0 = minimum amplitude (off), 15 = maximum amplitude

Frequency register  (08h - 0Dh)
-----------------------------

	0 = lowest, 255 = highest frequency

Octave select  (10h - 12h)
---------------------------

	value	Frequency       (input clk 8MHz)
	  0	31 Hz - 61 Hz
	  1	61 Hz - 122 Hz
	  2	122 Hz - 244 Hz
	  3	245 Hz - 488 Hz
	  4	489 Hz - 977 Hz
	  5	978 Hz - 1.95 kHz
	  6	1.96 kHz - 3.91 kHz
	  7	3.91 kHz - 7.81 kHz

Channel frequency enable  (14h)
-------------------------------

	0 = off, 1 = on

Channel noise enable  (15h)
---------------------------

	0 = off, 1 = on

Noise generator  (16h)
----------------------

	value	Frequency       (input clk 8MHz)
	  0	31.3 kHz
	  1	15.6 kHz
	  2	 7.6 kHz
	  3	61 Hz - 15.6 kHz  (FG 0 is used for NG 0 and
		                   FG 3 is used for NG 1 )


Envelope generator  (18h - 19h)
-------------------------------

   bit  7 6 5 4 3 2 1 0
        - - - - ----- -
        | | | |   |   |
        | | | |   |   +-| 0 = Left and right have same envelope
        | | | |   |     | 1 = Right envelope is inverse of left
        | | | |   |
        | | | |   |     | 0 = Zero amplitude
        | | | |   |     | 1 = Maximum amplitude
        | | | |   |     | 2 = Single decay            \______
        | | | |   +-----| 3 = Repetitive decay        \|\|\|\
        | | | |         | 4 = Single triangular       /\_____
        | | | |         | 5 = Repetitive triangular   /\/\/\/\
        | | | |         | 6 = Single attack           /|_____
        | | | |         | 7 = Repetitive attack       /|/|/|/|
        | | | |
        | | | +---------| 0 = 4 bits for envelope control
        | | |           | 1 = 3 bits for envelope control
        | | |
        | | |           | 0 = Internal envelope clock (FG 1 is used for EG 0
        | | +-----------|                          and FG 4 is used for EG 1)
        | |             | 1 = External envelope clock (address write pulse)
        | |
        | +-------------| not used
        |
        +---------------| 0 = Reset (no envelope control)
                        | 1 = Envelope control enabled


Reset, Sound Enable  (1Ch)
--------------------------

	SE   0 = All channels disabled
	     1 = All channels enabled

	R    0 = 
             1 = Reset and synchronizes generators