HP BASIC uses the range CHR$(128) to CHR$(143) for attribute and color control characters. This range is used by some character sets for various international characters. To allow use of characters in this range, HTBasic will move attribute and color control characters from this range to CHR$(16) to CHR$(31) with the statement:
CONTROL CRT,100;1
To restore the normal range, use
CONTROL CRT,100;0
When HTBasic is run in Japanese mode, CONTROL CRT,100;1 is executed automatically.
CONTROL CRT,100 does not affect values used with CONTROL registers, only values PRINTed or OUTPUT to the CRT. This statement is an enhancement to HTBASIC and will return an error if executed on a Series 200/300 computer.
The following table shows the attribute and color control characters for both the normal and alternate ranges. Remember that not all attributes are supported on every display.
