Iron - Description and programming of AY-3-8910(12).

 ++                                   ++  
++|       ОПИСАНИЕ AY-3-8910(12)      |++ 
++|                                   |++ 
 ++                                   ++  
                                          
 Отформатено и закинуто by Sokol/Infotek  
                                          
                                          
          AY-3-8910 и AY-3-8912           
                                          
     Программируемый   генератор   звуков 
AY-3-8910/8912    (ISG)   фирмы   General 
instrument представляет собой БИС, позво- 
ляющую воспроизводить широкую гамму слож- 
ных звуковых эффектов, и легко сопрягает- 
ся  с любым 8/16 разрядным микропроцессо- 
ром.                                      
     Он  имеет  3  программно-независимых 
звуковых канала и два (для 8912 - один) 8 
разрядных универсальных порта ввода/выво- 
да. ISG может выдавать звуковые сигналы в 
диапазоне8 sounds maker AY-3-8910 and 
AY-3-8912.                                
   ISG 8910/8912 pin assignment:     
DAO-DA7 - data/address (input/output) used 
            used for data exchange 
            with microprocessor in mode 
            data, and in combination with DAO- 
            DAZ - number of selected re- 
            hyster in address mode.  
CS1 and CS2 are chip selection inputs. Time 
            solves data exchange when 
            feeding them "1" and "0" 
            accordingly.               
RESET - when “0” is applied, the entire register 
            first memory area 
            resets to zero. Stocked 
            internal retaining resist- 
            torus                        
CLOCK - input for clock supply 
            frequency that sets the time 
            tone generator parameters, 
            noise and envelope.             
BDIR - (bus direction) determines 
 direction of data exchange 
            DAO-DA7 bus.  "0" - reading, 
            "1" is a record.                 
BC1 and BC2 - (bus control 1,2) uses - 
            to control all buses 
            nal operations in ISG.        
       BDIR | BC1 | BC2 | function         
  ------+-----+-----+-----------------    
       0 |  0 |  1 |inactive         
       0 |  1 |  1 | reading from ISG     
       1 |  0 |  1 | ISG entry      
       1 |  1 |  1 | address fixation   
Analog                                
channels                                    
A, B, C - output of the corresponding DAC, 
            forming a composite sound-
            oh signal with double amplitude 
            go up to 1 volt.              
IOAO-IOA7,                                
IOBO-IOB7 - parallel bidirectional 
 input/output ports, equipped with 
            supported by supporting resistors on 
            +5V.                          
TEST 1.2 - conclusions intended 
            only for gene testing 
            rator, in real circuits not 
            are used and should be 
            always free.            
                                          
    AY-3-8910/8912 pin assignment     
             -----8910-----               
             |  --8912-- |               
             |  |      |  |               
           ------------------             
    GND ---| 1 6 3 40 |<-- +5B      
           |                |             
not Spanish ---| 2 - 2 39 |--- TEST1    
           |                |             
channel B <--| 3 4 1 38 |--> channel C  
           |                |             
channel A <--| 4 5 28 37 |<-> DAO      
           |                |             
what isp. ---| 5 - 27 36 |<-> DA1      
           |                |             
   IOB7 <->| 6 - 26 35 |<-> DA2      
           |                |             
   IOBb <->| 7 - 25 34 |<-> DAZ      
           |                |             
   IOBS <->| 8 - 24 33 |<-> DACH      
           |                |             
   IOBCH <->| 9 - 23 32 |<-> DAS      
           |                |             
   IOBZ <->| 10 - 22 31 |<-> DAb      
           |                |             
   IOB2 <->| 11 - 21 30 |<-> DA7      
           |                |             
   IOB1 <->| 12 - 20 29 |<-- BC1      
           |                |             
   IOBO <->| 13 - 19 28 |<-- BC2      
           |                |             
 IOA7 <->| 14 7 18 27 |<-- BDIR     
           |                |             
   IOAb <->| 15 8 - 26 |<-- TEST2    
           |                |             
   IOAS <->| 16 9 17 25 |<-- CS1      
           |                |             
   IOACH <->| 17 10 - 24 |<-- CS2      
           |                |             
   IOAZ <->| 18 11 16 23 |<-- RESET    
           |                |             
   IOA2 <->| 19 12 15 22 |<-- CLOCK    
           ||             
   IOA1 <->| 20 13 14 21 |<->IOAO     
           ------------------             
                                          
    Programming AY-3-8910/8912    
       
     ISG is case-sensitive 
sound generator. Its functions are 
are filled through 16 internal re- 
gisters.  The register number is set to 4 low- 
small bits when issuing the command "fix- 
address" and remains valid until 
receiving a command to change this address.   
                                          
----------------------------------------- 
Register N |         Purpose           
----------------------------------------- 
 0, 2, 4 | Lower 8 bits of voice frequency 
           | A, B, C;  can accept 
           | values from 0 to 255.        
 1, 3, 5 | The upper 4 bits of the holo frequency 
           | owls A, B, C; can accept 
           | values from 0 to 15.         
 6 | Generator frequency control 
           | torus of noise;  can accept 
           | values from 0 to 31.         
 7 | Mixer control and 
           | input/output; may be accepted 
           | mother values from 0 to 255.   
 8, 9, 10 | Controlchannel amplitude 
           | fishing A, B, C; can accept 
           | values from 0 to 16.         
 11 | Lower 8 control bits 
           | package period; may 
           | Take values from 0 to 255. 
 12 | Upper 8 control bits 
           | package period; may 
           | Take values from 0 to 255. 
 13 | Selecting a waveform 
           | package; can take on 
           | values from 0 to 15.            
 14, 15 | I/O Port Registers 
           | can take values from 
           | 0 to 255.                    
----------------------------------------- 
                                          
     The main thing when working with ISG is re- 
hyster 7. Its main purpose is to determine 
decide which channels should participate in 
sound formation and determine the direction 
exchange of input/output ports.           
                                          
----------------------------------------- 
  7 | 6 |  5 | 4 | 3 |  2 | 1 |  0    
------+---+-----+---+---+-----+---+------ 
Port A|- B|Noise C|- B|- A|Tone C|- B|- A    
----------+------------+---------------- 
I/O|ch. for noise| channel for tone 
----------------------------------------- 
                                          
     When setting the value in the registers 
we are 16, amplitude inchannel controlled 
built-in, common for all three channels, 
envelope generator. Selecting the type of bending - 
and its attenuation is carried out in the re- 
gistre 13.                                
bit 0 - attenuation bit 1 - change    
bit 2 - rising bit 3 - continuation  
                Examples:                  
OUT 65533,Reg_Numb OUT 49149,Data      
                Shot:                  
10 OUT 65533.6 : OUT 49149.31             
20 OUT 65533.7 : OUT 49149.7              
30 OUT 65533.8 : OUT 49149.16             
40 OUT 65533.9 : OUT 49149.16             
50 OUT 65533.10: OUT 49149.16             
60 OUT 65533.12: OUT 49149.18             
70 OUT 65533.13: OUT 49149.0              
                                          
 That's all, I hope the above 
the description will really be useful to you. 
                                          
      For this I ask you to take your leave (s)i