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Index > OS Construction > Miraculix Test

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Kreoton



Joined: 05 Jun 2004
Posts: 14
Location: Russia, Moscow
Kreoton
Post 10 Oct 2004, 21:48
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asmdemon



Joined: 18 Jan 2004
Posts: 97
Location: Virginia Beach, VA
asmdemon
it works fine, until you press a key. i have included pictures of before and after a keypress was done and how the kernel responed to it.


Description: before any key pressed
Filesize: 33.96 KB
Viewed: 3282 Time(s)

before.jpg


Description: after any key pressed
Filesize: 23.46 KB
Viewed: 3282 Time(s)

after.jpg


Description: kernel response to keypress
Filesize: 39.87 KB
Viewed: 3282 Time(s)

response.jpg



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Post 11 Oct 2004, 00:27
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Matrix



Joined: 04 Sep 2004
Posts: 1171
Location: Overflow
Matrix
Hello,
i recommend this size optimized exit code for your os Smile

Code:
; they are the same in size, but the right side won't exit on esc if ah<>0
; 5 bytes (7 with int 20h)
; i will not take any responsibility for any hardware damages
; this code can cause
; i recommend using the right side with dec al, however its all right if ah=0
; MATRIX
org 256

mainloop:
in ax,$5f    ; in al,$60
sahf         ; dec ax
jnc mainloop ; jnc mainloop

int 20h
    


it does weird things Smile

MATRIX
Post 11 Oct 2004, 02:18
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Kreoton



Joined: 05 Jun 2004
Posts: 14
Location: Russia, Moscow
Kreoton
>>>it works fine, until you press a key.
All is correct Smile Meanwhile, IRQ1 is used for return in debuger...
Because OS is at an early stage of development...

no_int20: ; IRQ1, Keyboard
cmp al,0x21 ; Controller: i8248
jne no_int21
in al,0x60
mov al,0x20 ; EOI
out 0x20,al
; Return to AXE debuger...
mov al,0xFE
out 0x64,al

>>>i recommend this size optimized exit code for your os
Very Happy interesting code...
Post 11 Oct 2004, 05:10
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Kreoton



Joined: 05 Jun 2004
Posts: 14
Location: Russia, Moscow
Kreoton
Post 03 Dec 2004, 23:10
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