Toshiba AS311 Manual De Usuario

ASCII Interface Module (AS311) 

 

 
 

 
 

 

The receiving and transmitting data area is provided to exchange the communication 

 

 

characters between T3 and AS311. The address ranges in the AS311 buffer memory 

 

 

are as follows. 

 
 

 

Address          Word data 

128 

Channel 1  

reading (receiving) 

data area 

 

 
   448 words 

576 

Channel 1  

writing (transmitting) 

data area 

 

 
   448 words 

1024 

Channel 2  

reading (receiving) 

data area 

 

 
   448 words 

1472 

Channel 2  

writing (transmitting) 

data area 

 

 
   448 words 

 
 
 

 

When AS311 receives a message (one set of transmission characters), AS311 sets the 

 

 

characters into the receiving data area starting with the address 128 or 1024. Then T3 

 

 

can read these characters from the receiving data area by using READ instruction. 

 
 

 

When T3 attempts to send a message via AS311, T3 writes the characters into the 

 

 

transmitting data area starting with the address 576 or 1472 by using WRITE  

 

 

instruction, and instructs AS311 to start transmitting. AS311 recognizes from the  

 

 

character stored in the starting address (576 or 1472) to the trailing code character as 

 

 

the one set of transmitting message. 

 
 

 

Refer to section 5 for message receiving/transmitting procedure.