Wyse WY-99GT User Manual page 53

Table C-2 Continued
Alpha Mode
Table C-3 Alpha Mode
Command Format Summary
WY-99GT User's Guide
Command
Byte Format
97 + 1 byte
97 + 01 + MSB + LSB
Function
Creates a vertical line. The byte is in the 2 through
255 range, indicating the number of consecutive
words in the line.
Alternate format to create a vertical line where 01 is
a long function and MSB + LSB indicates the
number of words in the line.
Within PC Graphics, there is a text mode. In this mode, bytes 1
to FF, when received by the terminal, are treated as standard
ASCII text. Byte OOH (Null) is the leading byte for a set of
control commands in this mode. Table C-3 summarizes those
commands.
Command
Byte Format
Null + 0000 aaaa +
aaaa aaaa
Null + 20H + ttts ssss +
ttte eeee
Null+ 40H
Null+ 41H
Null+ 42H
Null+ 43H
Function
Sets a new cursor position where
Binary a is the offset of the cursor in the text
display
Sets cursor attribute where
Binary s-Starts cursor overlay scan line
Binary e-Ends cursor overlay scan line
Binary t-Controls cursor attribute:
Bit 7-No function
Bit 6-Cursor display, on or off
Bit 5-Cursor blink, on or off
Bits 4 through 0-Start/stop cursor scan
Clears display
Clears from cursor position to end of line
Sounds bell
Scrolls page and inserts blank row at the bottom
of the page
A-19