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Index > OS Construction > seg off printing

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GhostXoPCorp



Joined: 13 Dec 2008
Posts: 199
Location: 01F0:0100
GhostXoPCorp
i am making an error handler for my os for invalid opcodes and div by ,
can anyone show me or point me to a cite that prints your seg:offset at error
this may not be useful as the error will not halt the os but i just want to make it for the program crash handler. can anyone help

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Oh that divide overflow. Just jumps out of the bushes every time to scare the day lights out of me.
Post 11 Jun 2009, 19:54
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Borsuc



Joined: 29 Dec 2005
Posts: 2466
Location: Bucharest, Romania
Borsuc
You'll have to convert them to ASCII first. That's usually a generic function, search around I'm sure you'll find (sorry it's 4 AM I can't give you code now Sad).

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Post 12 Jun 2009, 01:02
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windwakr



Joined: 30 Jun 2004
Posts: 827
Location: Michigan, USA
windwakr
Theres a routine here you could study that converts hex number to ascii and prints, its written by Thimis.

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Post 12 Jun 2009, 02:14
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GhostXoPCorp



Joined: 13 Dec 2008
Posts: 199
Location: 01F0:0100
GhostXoPCorp
Borsuc: you dont have to give me code
windwakr: thanks

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Oh that divide overflow. Just jumps out of the bushes every time to scare the day lights out of me.
Post 12 Jun 2009, 02:27
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bitshifter



Joined: 04 Dec 2007
Posts: 764
Location: Massachusetts, USA
bitshifter
To unpack PBCD into ASCII and print it...

Code:
PrintPBCD:
; AL = PBCD
        mov   ah,al
        and   ax,0xF00F
        shr   ah,4
        or    ax,0x3030
        xchg  al,ah
        call  PrintChar ; prints char in AL
        xchg  al,ah
        call  PrintChar
        ret
    

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Coding a 3D game engine with fasm is like trying to eat an elephant,
you just have to keep focused and take it one 'byte' at a time.
Post 12 Jun 2009, 04:35
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GhostXoPCorp



Joined: 13 Dec 2008
Posts: 199
Location: 01F0:0100
GhostXoPCorp
must... not... hit.. copy... ugh (kidding) thanks, i will take and use this to my advatage. thanks again

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Oh that divide overflow. Just jumps out of the bushes every time to scare the day lights out of me.
Post 12 Jun 2009, 07:04
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