Atari ST series - Page 370

APPENDIX I
$17 Set Joystick Monitoring
T h is co m m an d sets th e IK BD in to jo ystic k m o n itorin g m o d e . W h en in th is
m o d e , th e IK BD d o e s n o th in g b u t m o n itor th e jo y stick , co m m u n ica te o v er
th e serial lin e, a n d m a in ta in th e tim e -o f-d ay clo ck . T h e rate a t w h ich th e
jo ystick is sa m p led m a y b e co n tro lle d d o w n to 1/1 0 0 of a se co n d .
Input parameters
Byte
Number Description
1 T im e b e tw e en jo ys tick sam p les (in un its o f 1/100 o f a se co n d ).
Packet returned
Byte
Number Description
1 Fire b u tto n sta tu s fo r jo y stick 0 an d l(xx xx xx B B )
B it 0 = 1 F ire b u tto n p re sse d o n joy stick 1
B it 1 = 1 Fire b u tto n p re s sed o n jo ystick 0
3 Jo ystick sta tu s for jo ystick 0 a n d 1 (R L D U R LD U )
B it 0 = 1 Jo y stic k 1 p res sed in u p d ire ctio n
B it 1 = 1 Joy stick 1 p re sse d in d o w n d ire ctio n
B it 2 = 1 Jo y stick 1 p re sse d in left direction
B it 3 = 1 Jo ys tick 1 p re sse d in rig h t d ire ction
B it 4 = 1 Jo ys tick 0 p re sse d in u p d ire c tio n
B it 5 = 1 Jo y s tick 0 p res sed in d o w n d irectio n
B it 6 = 1 Joy stick 0 p re s sed in left d ire ctio n
B it 7 = 1 Jo ystick 0 p re sse d in righ t d ire ction
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