keithr@vice.ICO.TEK.COM (U.D.M.) (03/09/91)
I was wondering where I might find the hex code for the keys on the ST keyboard (arrows keys, functions keys) and special screen characters (arrows, bells, etc). Any help would be greatly appreciated. Thanks Keith Rast keithr@icogem3.ICO.TEK.COM
steve@thelake.mn.org (Steve Yelvington) (03/09/91)
[In article <7077@vice.ICO.TEK.COM>,
keithr@vice.ICO.TEK.COM (U.D.M.) writes ... ]
> I was wondering where I might find the hex code for the keys on the
> ST keyboard (arrows keys, functions keys) and special screen
> characters (arrows, bells, etc). Any help would be greatly
> appreciated.
The BIOS Bcon* and GEMdos Ccon* functions return 32-bit values.
Since the ST is natively a 16-bit machine, 32-bit values are
difficult to work with. (For example, a switch-case statement in
C expects 16-bit quantities with most C compilers.) Fortunately,
most of the data encoded in the 32-bit returned value is of little
or no use. By shifting bits, you can ``collapse'' the useful data into
16 bits quite easily.
The source code to the dLibs getch() function shows how to do this.
The function returns the ASCII value in the low byte and a scan
code in the high byte.
Scan codes are unique for each key, and each alt/control/etc. key
combination. This makes it possible to distinguish between the 4 on
the numeric keypad and the 4 on the typewriter keypad, for example.
Some keys, such as the cursor arrows, function keys, HELP, UNDO,
etc., do not produce ASCII values. In their cases, the low byte
will be null and only the high byte is useful.
Various ST reference books contain tables of key values, but
you can easily produce your own by writing a small program that
prompts you for a key definition, followed by the keystroke. You
can even write the output to a keydefs.h file if you like.
Here are some useful codes (not all of them, though):
/*
* Atari ST 16-bit function key values
* for use with getch()
*/
#define ARROW_LEFT 0x4B00 /* [left arrow] */
#define ARROW_RIGHT 0x4D00 /* [right arrow]*/
#define ARROW_UP 0x4800 /* [up arrow] */
#define ARROW_DOWN 0x5000 /* [down arrow] */
#define KEY_TAB 0x0F09 /* [tab] */
#define KEY_UNDO 0x6100 /* [undo] */
#define KEY_HELP 0x6200 /* [help] */
#define KEY_INS 0x5200 /* [insert] */
#define KEY_CLR 0x4700 /* [clr/home] */
#define KEY_CR 0x1C0D /* [return] */
#define KEY_ENTER 0x720D /* [enter] */
#define KEY_LF 0x720D /* [enter] */
#define KEY_BS 0x0E08 /* [backspace] */
#define KEY_DEL 0x537F /* [delete] */
#define KEY_BRK 0x2E03 /* [control][C] */
#define KEY_F1 0x3B00 /* [f1] */
#define KEY_F2 0x3C00 /* [f2] */
#define KEY_F3 0x3D00 /* [f3] */
#define KEY_F4 0x3E00 /* [f4] */
#define KEY_F5 0x3F00 /* [f5] */
#define KEY_F6 0x4000 /* [f6] */
#define KEY_F7 0x4100 /* [f7] */
#define KEY_F8 0x4200 /* [f8] */
#define KEY_F9 0x4300 /* [f9] */
#define KEY_F10 0x4400 /* [f10] */
#define ALT_DASH 0x8200 /* [alt][-] */
#define ALT_A 0x1E00 /* [alt][A] */
#define ALT_B 0x3000 /* [alt][B] */
#define ALT_C 0x2E00 /* [alt][C] */
#define ALT_D 0x2000
#define ALT_E 0x1200 /* [alt][E] */
#define ALT_F 0x2100 /* [alt][F] */
#define ALT_H 0x2300 /* [alt][H] */
#define ALT_I 0x1700
#define ALT_J 0x2400
#define ALT_K 0x2500
#define ALT_R 0x1300 /* [alt][R] */
#define ALT_S 0x1F00 /* [alt][S] */
#define ALT_T 0x1400 /* [alt][T] */
#define ALT_0 0x8100 /* [alt][0] */
#define ALT_X 0x2D00 /* [alt][X] */
#define ALT_G 0x2200 /* [alt][G] */
#define ALT_P 0x1900 /* [alt][P] */
#define ALT_L 0x2600 /* [alt][L] */
#define ALT_V 0x2F00 /* [alt][V] */
#define KEY_ESCAPE 0x011B
----
Steve Yelvington / P. O. Box 38 / Marine on St. Croix, MN 55047 USA
INTERNET: steve@thelake.mn.org UUCP: plains!umn-cs!thelake!steve