Atari ST series Technical Reference Manual page 236

R e s e r v e d f o r f u t u r e u s e
1 3
R e s e r v e d f o r f u t u r e u s e
1 4
M u s t b e 0
1 5
Results
DO c o d e w o r d
228
Setprt
T h e o l d v a l u e o f t h e p r i n t e r c o n f i g u r a t i o n c o d e . B y
s e t t i n g n e w c o d e to - 1 , i t 's p o s s ib le to r e a d t h e c u r ­
r e n t c o d e v a l u e w i t h o u t c h a n g i n g it.