Tandy 1000 SL Technical Reference Manual page 577

Software
18
19
1A
1c
1E
~~ ~
The structure and usage of the Keyboard driver RAM data area is as
follows:
HEX Offset
From Segment
Length and
0040:0010 Intended Use
17 1 byte- Keyboard shift state flag
Bits 7- INSERT state active,
returned by function 02
6
-
CAPS LOCK
On/Off,
5
-
NUM LOCK on/off,
4
-
SCROLL LOCK on/off,
3
-
ALT key pressed
2 - CTRL key pressed
1
-
Left SHIFT key pressed,
0
-
Right SHIFT key pressed,
lbyte- Secondary shift state flag,
Bits INSERT key pressed,
6 - CAPS LOCK pressed,
5 -
NUM LOCK pressed,
4
- SCROLL LOCK NUM LOCK
pressed,
4
-
SCROLL pressed,
4
-
SCROLL LOCK pressed,
3
-
Pause odoff, pressed,
3
-
Pause odoff,
2,1,0
-
not used
1 byte- Used to store ALT keypad entry
1 word- Pointer to beginning of the
1 word- Pointer to end of the keyboard
16-
15- Type ahead entries
keyboard buffer
buffer
Keyboard buffer (enough for words)
56.