Re quest key board buffer sta tus com mand 33, En able block mode com mand 33, Dis able block mode com mand 33 – Maple Systems MAP450D User Manual
Page 34: Dis play con trol com mands 33, Read dis play vari able com mand 33, Disable block mode control command 33, Enable block mode control command 33, Disable block mode 33, Enable block mode 33, Read display variable 33
Request Keyboard Buffer Status Command
ESC
? terminator
Response: status terminator
status:
0 = buffer empty
1 = keyboard input in progress (Block and Network modes)
2 = entire message buffered, waiting for Poll OIT Buffer control
command (Network mode)
Description: Allows the host controller to determine the status of the OIT’s Keyboard
Input Buffer.
Example: PRINT CHR(27); “?”; CHR(2)
Enable Block Mode Command
ESC
{ start end fill terminator
start:
00 to 39. Starting cursor column number. 00 defaults to the position of
the cursor at the time the command is received.
end:
00 to 39. Ending cursor column number. 00 defaults to the end of the
current line at the time the command is received.
fill:
SPACE to ~. Fill character used to replace any characters affected by
the Clear Output Buffer command or the DEL and CAN control codes.
If not specified, the ASCII space character is used.
Response: none
Description: Allows the host controller to dynamically change from Interactive to Block
mode. The optional start, end, and fill parameters limit the input to a specific area of
the display (up to 40 characters). This command can be used in Network mode.
Example: PRINT CHR(27); “{1520”; CHR(2)
Disable Block Mode Command
ESC
} enable terminator
enable:
0 = no change, 1 = off (disable keyboard entry), 2 = on
Response: none
Description: After sending the Enable Block Mode command, the Disable Block Mode
command allows the host controller to return the OIT to Interactive mode, clears the
OIT’s Keyboard Output Buffer, and enables or disables the keyboard. If the OIT was in
Network mode when the Enable Block Mode command was received, then the block
input field is cleared without changing the operating mode.
Example: PRINT CHR(27); “}2”; CHR(2)
Display Control Commands
Read Display Variable Command
ESC
u terminator
Response: text terminator
text:
ASCII characters currently in the display variable
Description: Allows the host controller to retrieve the contents of a display variable.
Example: PRINT CHR(27); “u”; CHR(2)
33
MAP450D Operation Manual
1010-0101, Rev. 00