Title: MODEM (MDM)


Some BASIC commands require that you signify the modem configuration.  The 
baud rate is set to 300 by default.  The rest of the configuration consists of 
a four character string of the pattern (wpbs): 

 w - Word Length: This is a number from 6 to 8, where 6=6bits; 7=7bits; 
                  8=8bits. 

 p - Parity: either E,O,I, or N, where E=even; O=odd; I=ignore; N=none

 b - Stop Bits: Either 1 or 2, where 1=1 stop bit; 2=2stop bit.

 s - Xon/Xoff Status: Either E or D, where E=enable; D=disable 


CLOSEfilenumberlist
 Closes the files OPEN'ed as filenumber. 


EOF(filenumber)
 Tests for an end-of-file condition on the modem file OPEN'ed as filenumber.  
 The function returns a "logical" answer, either "true" (-1) if you have 
 reached the end of the file, or else "false" (0) if you have not reached the 
 end of the file. 


INPUT#filenumber,variablelist
 Inputs data sequentially from the modem file OPEN'ed as filenumber. 


INPUT$(numericexpression,filenumber)
 Returns a string of a length given by numericexpression from the modem file 
 OPEN'ed as filenumber. 


LINEINPUT#filenumber,stringvariable
 Reads a line of text from the device.


LOAD"MDM:filename",R
 Loads a BASIC program from the modem .  If R is present, BASIC runs the 
 program after it has been loaded. 


MAXFILES
 Stores the current maximum number of files.  You may access MAXFILES line any 
 numeric variable. 


MDMONorOFForSTOP
 Enables or disables the ONMDM interrupt.


MERGE"MDM:filename"
 Merges the lines from the incoming file with the lines of the current 
 program. 


ONMDMGOSUBlinenumber
 Defines an interrupt subroutine for incoming modem communications.


OPEN"MDM:filename"FORmodeASfilenumber
 Allocates a buffer, filenumber, for a modem file called filename.  Mode can 
 be OUTPUT, specifying data will be transmitted out the modem, or INPUT, 
 specifying data will be received from the modem. 


PRINT#filenumber,expressionlist
 Writes the values of expressionlist to the modem file OPEN'ed as filenumber. 


PRINT#filenumber,USING"format";expressionlist
 Formats the data in expressionlist and sends it to the modem file OPEN'ed as 
 filenumber.  Format consists of one of more of the following "field 
 specifiers": 

Prints first string character.
 PRINT#1,USING"!";"Tandy"

Prints 2+n characters from a string.
 PRINT#1,USING"\\";"Tandy"

Print one digit for each #.
 PRINT#1,USING"#####";5

Inserts the algebraic sign of the number.
 PRINT#1,USING"+####";-13

Inserts a minus sign either at the beginning or end of negative numbers.  
 PRINT#1,USING"-####";14 

Converts leading blanks to leading asterisk blanks.
 PRINT#1,USING"**#####";145 

Inserts a dollar sign to the immediate left of the formatted number.  
 PRINT#1,USING"$$#####";450 

Changes leading spaces to asterisks except for the space to the immediate left 
of the number, where is inserts a dollar sign. 
 PRINT#1,USING"**$###";12 

Inserts a decimal point.
 PRINT#1,USING"#####.##";14.5

Inserts a comma before every three printed digits to the left of the decimal 
point. 
 PRINT#1,USING"#########,";14432

Prints the number in exponential format.
 PRINT#1,USING"###.##^^^^";342200 


RUN"MDM:filename",R
 Clears all variables, loads the BASIC program called filename from the modem, 
 and then executes the program.  If R is present, BASIC keeps all open files 
 open.  If R is omitted, BASIC closes all open file before loading filename. 


SAVE:MDM:filename",A
 Writes the current BASIC program out the modem in ASCII format.  


TAB(numericexpression)
 Writes numericexpression spaces before writing the next data item.  
 Numericexpression spaces between 0 and 255. 

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