Tandy 1000 SL Technical Reference Manual page 53

Address D e s c r i p t i o n
0 OC7 R/W A m p l i t u d e / f r e q u e n c y
msb
f o r DAC s o u n d c h a n n e l
B i t 0
B i t 1
B i t 2
B i t
3
B i t 4
B i t
5
B i t 6
B i t 7
F8
F9
F10
F 1 1
R e s e r v e d
A M P 1
A M P 2
A M P 3
00C8-00CF R e s e r v e d
0100-01FF R e s e r v e d
0 2 0 0-0 2 0 7 J o y s t i c k
W r i t e C l e a r (Resets Ramp G e n e r a t o r To 0)
0 2 0 1
Read R = R i g h t J o y s t i c k , L = L e f t J o y s t i c k
B i t
D e s c r i p t i o n
0
R
-
x
H o r i z o n t a l P o s i t i o n
1 R
-
Y V e r t i c a l P o s i t i o n
2 L
-
X
H o r i z o n t a l P o s i t i o n
3 L
-
Y V e r t i c a l P o s i t i o n
4
R
B u t t o n #1 ( L o g i c 0
= B u t t o n P r e s s e d )
5 R
B u t t o n #2 ( L o g i c 0 = B u t t o n P r e s s e d )
6 L B u t t o n #1 ( L o g i c 0
=
B u t t o n P r e s s e d )
7 L B u t t o n #2 ( L o g i c 0 = B u t t o n P r e s s e d )
0208-020F N o t Used
0210-02F7 R e s e r v e d
2F8-2FF S e r i a l P o r t s e c o n d a r y (COM2 O p t i o n a l )
02F8
W r i t e T r a n s m i t t e r H o l d i n g R e g i s t e r ( C h a r a c t e r t o s e n d )
B i t D e s c r i p t i o n
0
B i t
0
-
LSB ( F i r s t B i t S e n t S e r i a l l y )
1 B i t 1
2 B i t 2
3 B i t 3
4 B i t 4
5
B i t 5
6
B i t
6
7 B i t 7
-
MSB
42