Tandy 1000 SL Technical Reference Manual page 529

Software
IN" 10H
AH
= 10
AL=OO
A L
= 01
AL=02
AH
= 13
A L
=
00
A L
= 01
A L
= 02
A L
= 03
Color Palette Interface
Set Individual Register
Set
Border Color
Set All Palette Registers and Border
Write String
Write Character String
Write Character String and
Move Cursor
Write Character and Attribute Strings
Write Character and Attribute Strings
and Move Cursor
8.