Vidicode Argus Basic Programmers Reference Manual

ARGUS Programmable Modem 
BASIC Programmers Reference Manual 
© 1990 - 1997 Vidicode Datacommunicatie BV 
58
  
DIAL    dial number 
This command will dial a number for you.  It is the same as ATD in modem mode, and is provided mainly to make your 
program easier to read. 
 
After the command DIAL, the system variable RESULT can be read to determine the status of the modem (BUSY, NO
ANSWER, CONNECT, etc.).  When a successful modem connection is made, DCD#3 will be set.  This can also be 
detected with...

ARGUS Programmable Modem 
BASIC Programmers Reference Manual 
© 1990 - 1997 Vidicode Datacommunicatie BV 
59
  
DIM    reserve space for arrays 
DIM (short for dimension), is used to reserve space for single dimension arrays of integers or strings.  The maximum 
number of elements allowed in integer arrays is theoretically 32767, but is in practice limited by the amount of memory 
available for variables after the program has been loaded.  The limitation of a maximum string length of 254 bytes still...

ARGUS Programmable Modem 
BASIC Programmers Reference Manual 
© 1990 - 1997 Vidicode Datacommunicatie BV 
60
  
DIR    list file directory 
The DIR command is used in its various forms to list and inform you about the contents of the RAM-disk. 
 
Because of the need to retain compatibility with earlier versions of Argus BASIC, DIR might be followed by FILE or !.  
This is optional however, and thus will not normally be used. 
 
The DIR command will list files stored in the RAM-disk.  The format and level...

ARGUS Programmable Modem 
BASIC Programmers Reference Manual 
© 1990 - 1997 Vidicode Datacommunicatie BV 
61
  
 
There are four possible file types: 
B 
: BASIC program 
T 
: Text file; created by RECEIVE ...,T 
X 
: binary file created by RECEIVE ...,X  (X-MODEM or Y-MODEM) 
The directory command lists files in date order, oldest first, and prints the number of free blocks remaining at the end of the 
list (not with DIR,N). 
 
The command DIR, B is used to list the contents of the information block...

ARGUS Programmable Modem 
BASIC Programmers Reference Manual 
© 1990 - 1997 Vidicode Datacommunicatie BV 
62
  
DIR ROM    list ROM directory 
The DIR ROM command is used to access the ROM or RAM disk in socket 2.  The command is used in its various forms 
the same as listed in the DIR command. 
 
However, to access a RAM disk in socket 2, the command CLEAR ROM must be entered first. 
See also: 
DIR, ROM
  

ARGUS Programmable Modem 
BASIC Programmers Reference Manual 
© 1990 - 1997 Vidicode Datacommunicatie BV 
63
  
DIV    integer divide 
The DIV command is used to carry out integer division operations.  As the modem does not support real numbers, DIV is 
exactly equivalent to division using the / operator. 
Examples: 
Result=XDIV5
Q1 = (Q2*4) DIV (Q3+2)
Syntax: 
[num-var] = [integer] DIV [integer]
See also: 
MOD
  

ARGUS Programmable Modem 
BASIC Programmers Reference Manual 
© 1990 - 1997 Vidicode Datacommunicatie BV 
64
  
DSR    Data Set Ready 
DSR is an RS232 signal used by modems to indicate that they are powered-up and ready to transfer data.  DSR will be 
active dependant on the setting with the modem command &S.  The signal is an output to the modem. 
 
The DSR command is used to set or read the status of the DSR line on the specified port.  When used for reading it returns 
TRUE if DSR is active, and FALSE...

ARGUS Programmable Modem 
BASIC Programmers Reference Manual 
© 1990 - 1997 Vidicode Datacommunicatie BV 
65
  
DTMF ON/OFF    dial tone multiple frequency 
DTMF ON turns on the DTMF receiver.  Reading the first DTMF value and the command VOICE will also turn it on.  
Therefore, use of the command, is optional. 
 
DTMF OFF turns off the DTMF receiver. 
 
In most cases, the modem has 2 DTMF receivers build in. They can be selected with S-register 23 bit6 as follows: 
SREG23=SREG23 AND &BF: Select External...

ARGUS Programmable Modem 
BASIC Programmers Reference Manual 
© 1990 - 1997 Vidicode Datacommunicatie BV 
66
  
[var] = DTMF    read DTMF receiver 
Reading this function will return 0 or an ASCII number.  When it is used for the first time, it will also turn on the DTMF 
receiver. 
 
Values:  0 =  No DTMF detected 
  48 =  0 detected 
  49 =  1 detected 
  50 =  2 detected 
  51 =  3 detected 
  52 =  4 detected 
  53 =  5 detected 
  54 =  6 detected 
  55 =  7 detected 
  56 =  8 detected 
  57 =  9...

ARGUS Programmable Modem 
BASIC Programmers Reference Manual 
© 1990 - 1997 Vidicode Datacommunicatie BV 
67
  
DTR    Data Terminal Ready 
DTR is the RS232 signal used by data terminals - also (host-) computers - to indicate that they are powered up and ready to 
transfer data.  The modem will automatically control the response to DTR according to the instructions given with the modem 
command &D. 
 
The DTR function is used to read the status of this signal on the specified port.  If no port is...