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Serial Command Interface Program Command Set
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| Each command consists of an upper case ASCII character which identifies the command. When a command requires a
numerical parameter, shown as nn below, this parameter is entered as two ASCII numeric characters in the range
00 to 99. So 1 is entered as 01. The character string display and storage commands S & F display 28 character
strings. The T command puts the system into typewriter mode. Characters are displayed on the screen as they are
typed until a return is entered. Characters for display can be entered as ASCII directly from the PC keyboard. |
 = ASCII carriage
return character, hexadecimal 0x0D. This character signals to the system that a command has been entered. The serial
command interface program responds with the command prompt character >. All the serial commands take various
times to execute therefore the return of the > character should be used to indicate that a command has completed. |
| Command |
Action |
| A |
Clears the entire screen. All character locations on the screen are filled with the space character. |
| B |
Toggles the character background display on and off. Current state stored in the unit |
| Cnn |
Sets the character position along the selected row ( X axis ) nn = 00..29. This value is stored in the unit and
sets the position of the stored string. |
| D |
Toggles the character blink attribute on or off. The current state stored in the unit |
| E |
Displays the string stored in the unit at the character and row positions defined and stored in the unit by the
C & R commands, with the attributes stored with the O command. |
|
Fc0..c27
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Stores the string entered in the eeprom memory of the unit. Up to 28 characters c0..c27 can be typed before entering
a return character. The string is also displayed on the screen. The stored string is automatically displayed at
start up and when the E command is entered. |
| Gnn |
Sets the character outline black level. nn = 00..03, 00 = Darkest, 03 = Lightest. Default =00 |
| Hnn |
Sets the screen and character background black level. nn = 00..07, 00 = Darkest, 07 = Lightest. Default = 02 |
| Inn |
Toggles the character invert attribute on or off |
| J |
Not used |
| K |
Not used |
| L |
Moves character position to the next line, character position 00 |
| M |
Set the unit into external video signal mode |
| N |
Set the unit into internal video signal mode |
| O |
Store the current settings of the background, blink and invert character attributes. The stored settings are used
for the display of the stored string |
| P |
Set the current values of the background, blink and invert character attributes to the stored settings |
| Q |
Reset the current values of the character attributes to background = off, blink = off and invert = off |
| Rnn |
Sets the character row position nn = 00..15 This value is stored in the unit |
|
Sc0..c27
|
Displays a string of up to 28 characters. The characters typed are only displayed when return is entered |
| Ttext |
Enters typewriter mode. Text characters entered are displayed immediately on the screen until a return character
is entered to exit typewriter mode |
| U |
Reset the unit to default values for character brightness, black level, screen background and X - Y display position |
| Vnn |
Not used |
| Wnn |
Change baud rate. 00 = 2400, 01 = 4800, 02 = 9600, 03 = 19200, 04 = 38400 |
| Xnn |
Sets the character position along the selected row ( X axis ) nn = 00..27. This value not stored in the unit |
| Ynn |
Sets the character row position nn = 00..15. This value is not stored in the unit |
| Z |
Not used |
| ZA |
RESERVED FOR CHARACTER SET REDEFINITION. DO NOT ISSUE THIS COMMAND VIA A TERMINAL PROGRAM |
| ZB |
Not used |
| ZC |
Not used |
| ZD |
Not used |
| ZEnn |
Set the character brightness. nn = 00..03, 00 = Brightest, 03 = Darkest. Default = 01 |
| ZFnn |
Set the vertical display offset from the top of the screen. nn = 00..31. Default = 31 |
| ZGnn |
Set the horizontal display offset from the left of the screen. nn = 00..63. Default = 55 |
| ZH |
Turn the background attribute of subsequent text on |
| ZI |
Turn the background attribute of subsequent text off |
| ZJ |
Turn the blink attribute of subsequent text on |
| ZK |
Turn the blink attribute of subsequent text off |
| ZL |
Turn the invert attribute of subsequent text on |
| ZM |
Turn the invert attribute of subsequent text off |
