Interrupt 09h Keyboard (0:0024h) Taken whenever a key is pressed or released. This is normally a scan IRQ1 code, but may also be an ACK or NAK of a command on AT-type keyboards. Stores characters/scan-codes in status at [0040:0017,18] (internal) math unit protection fault (80286 protected mode) entry AH 09h return at absolute memory addresses: 40:17 bit BIOS\Address -40:17 0 right shift key depressed 1 left shift key depressed 2 control key depressed 3 alt key depressed 4 ScrollLock state has been toggled 5 NumLock state has been toggled 6 CapsLock state has been toggled 7 insert state is active Interrupt 09h Keyboard return at absolute memory addresses: 40:18 bit BIOS\Address -40:18 0 left control key depressed 1 left alt key depressed 2 SysReq key depressed 3 Pause key has been toggled 4 ScrollLock key is depressed 5 NumLock key is depressed 6 CapsLock key is depressed 7 Insert key is depressed 40:96 bit BIOS\Address -40:96 0 last code was the E1h hidden code 1 last code was the E0h hidden code 2 right control key down 3 right alt key down 4 101 key Enhanced keyboard installed 5 force NumLock if rd ID & kbx 6 last character was first ID character 7 doing a read ID (must be bit 0) Interrupt 09h Keyboard return at absolute memory addresses: 40:97 bit BIOS\Address -40:97 0 ScrollLock indicator 1 NumLock indicator 2 CapsLock indicator 3 circus system indicator 4 ACK received 5 resend received flag 6 mode indicator update 7 keyboard transmit error flag 40:1E keyboard buffer (20h bytes) BIOS\Address -40:1E 40:1C buffer tail pointer BIOS\Address -40:1C 40:72 1234h if ctrl-alt-del pressed BIOS\Address -40:72 AL scan code note 1) Int\05 invoked if PrtSc key pressed 2) Int\1B invoked if Ctrl-Break key sequence pressed 3) Int\15f\85 invoked on AT and after if SysReq key is pressed 4) Int\15f\4F invoked on machines after AT 5) Int\16, BIOS keyboard functions, uses this interrupt. 6 Sample BIOS listing Int\09.ASM
file: /Techref/int/09.htm, 2KB, , updated: 1999/4/21 08:03, local time: 2024/10/12 02:58,
98.84.18.52:LOG IN ©2024 PLEASE DON'T RIP! THIS SITE CLOSES OCT 28, 2024 SO LONG AND THANKS FOR ALL THE FISH!
|
©2024 These pages are served without commercial sponsorship. (No popup ads, etc...).Bandwidth abuse increases hosting cost forcing sponsorship or shutdown. This server aggressively defends against automated copying for any reason including offline viewing, duplication, etc... Please respect this requirement and DO NOT RIP THIS SITE. Questions? <A HREF="http://www.massmind.org/techref/int/09.htm"> int 09</A> |
Did you find what you needed? |
Welcome to massmind.org! |
Welcome to www.massmind.org! |
.