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> OS Construction > Getting input from 16 bit mode |
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smiddy 19 Jun 2005, 04:12
Look up Terminate and Stay Resident (TSR) programming for DOS. Most TSRs have hooks into the keyboard through I think INT 9h (I can't recall the specifics at the moment).
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19 Jun 2005, 04:12 |
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bogdanontanu 19 Jun 2005, 14:24
TSR is a DOS thing
Just use BIOS INT 16h with ah=0 to read keyboard. Ckeckout BIOS INT functions for help. here is a small example from SolarOS 16 bit startup menu: Code:
...
;-----------------------------
; BIOS wait for a key
;-----------------------------
mov ah,0
int 16h
mov [user_key],ax
;---------------------------
; check special keys
;---------------------------
.IF ah==48h
;------------------
; up arrow
;------------------
dec [user_option]
.IF SIGN?
mov [user_option],0
.endif
.ELSEIF ah==50h
;--------------
;down arror
;--------------
inc [user_option]
.IF [user_option]>11
mov [user_option],11
.endif
.endif
...
_________________ "Any intelligent fool can make things bigger, more complex, and more violent. It takes a touch of genius -- and a lot of courage -- to move in the opposite direction." |
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19 Jun 2005, 14:24 |
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smiddy 19 Jun 2005, 17:21
bogdanontanu wrote: TSR is a DOS thing Hey Bogdan, Long time... Yeah I know this is a DOS thing, but I thought since he was looking for specific scan codes he may be interested in a deeper look. From what I recall the TSRs latch into the interrupt vector and scan for left-shift-A or right-ctrl-]. These are generally linked into a software interrupt for at a moments-notice useage. But perhaps I misunderstood Red's needs. There is always more than one way to skin a cat...some people like turpentine, others use a bazooka. And others too like to make a game out of it; here kitty-kitty!  |
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19 Jun 2005, 17:21 |
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Dex4u 19 Jun 2005, 17:35
It seems he is looking to make a bootable game like "CdPod" but for game, thats why he need to do keypressed.
@Redragon, Have you seen "Privalov" tetris game, from the 512b compo ?, that may help, as thats bootable,and enjoyable . |
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19 Jun 2005, 17:35 |
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Redragon 19 Jun 2005, 18:03
I just got it to work, i finally figured out what i was doing wrong..lol
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19 Jun 2005, 18:03 |
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