| Title: | Atari ST, TT, & Falcon |
| Notice: | Please read note 1.0 and its replies before posting! |
| Moderator: | FUNYET::ANDERSON |
| Created: | Mon Apr 04 1988 |
| Last Modified: | Tue May 06 1997 |
| Last Successful Update: | Fri Jun 06 1997 |
| Number of topics: | 1433 |
| Total number of notes: | 10312 |
Hi, I have a requirement to temporary disable ALL keyboard input. I need this because I am calling a PD subroutine in my programs to play some music. This PD subroutine works only correct as long as nobody hits a key during the playback. I don't have the sources of this subroutine. Writing a 0 to address FFFC00 (Keyboard ACIA Control Register) does the trick, every input is disabled (including mouse and joystick) and the current program continues. The problem I have is to enable manual input again. Restoring the old contents of FFFC00 does NOT work. Does someboday know the exact layout of the bits in the Keyboard Control Register? Or does somebody know a better way of doing this, preferable prgramming language independent? Kees de Vries.
| T.R | Title | User | Personal Name | Date | Lines |
|---|---|---|---|---|---|
| 1224.1 | USE $484 | RIGI::BOLLIGER | Mon Dec 30 1991 06:32 | 20 | |
( use CONTERM )
the Adress $484 (Hexa) contains some Bits you could use
the BITS are:
bit 0 = key Klick on/off
bit 1 = key repeat on/off
bit 2 = bell on/off
bit 3 = extended kbshift
so if you don't like that the Key klick disturb your SOUND so
just CLEAR the BIT 0 of adr. 484 (hexa)
in Assembler use BCLR #0,$484 BSET #0,$484
FRED
| |||||
| 1224.2 | 6850 register bits are different on READ | PRNSYS::LOMICKAJ | Jeffrey A. Lomicka | Mon Dec 30 1991 12:38 | 6 |
| 1224.3 | dis/enable keyboard. | IJSAPL::KDEVRIES | Kees de Vries | Mon Jan 06 1992 05:56 | 11 |
*.1 and *.2 put me on the right track. The ACIA control register contains a lot more bits. After some experiments I figured out that communications between ST and keyboard processor is 8 bits, no parity , 1 stop bit, speed :64. To disable keyboard 0x16 to 0xfffc00. (including mouse , joystick) To enable keyboard 0x96 to 0xfffc00. Kees de Vries. | |||||
| 1224.4 | PRNSYS::LOMICKAJ | Jeffrey A. Lomicka | Tue Jan 07 1992 15:12 | 2 | |
Glad you got it figured out. When I went back to reply with real numbers, the conference got weird and I didn't get back in until today. | |||||