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PostPosted: Sun Feb 10, 2008 5:15 am 
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Joined: Sat Nov 03, 2007 10:43 am
Posts: 38
Location: France
Hi,

Here is a little trouble with radeao video during boot. This is coming for the serial console. Serial console freezes after that... :/

EMULATION INT HANDLER ENTERED WITH:
INT NO: 15

EAX=0003 EBX=1111 ECX=2222 EDX=3333 ESP=0000 EBP=5555 ESI=6666 EDI=7777
AX=4E08 BX=C505 CX=0003 DX=102A SP=6CE9 BP=5555 SI=5D3D DI=7777
DS=C000 ES=BAD0 SS=C000 CS=F000 IP=FE15 NV UP -- PL ZR NA PE NC
CS:IP = F4 FS=BAD4 GS=BAD5C646 C000 0244 3000 0000 01B4 B08E 0200
UNHANDLED INT 10 FUNCTION 0007 WITHIN EMULATION
VM using 1652891 x86 cycles for GFX init

Czk.


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PostPosted: Mon Feb 11, 2008 10:37 am 
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Joined: Sun Jan 14, 2007 8:01 am
Posts: 187
what is your os?
what is your mainboard? efika?


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PostPosted: Mon Feb 11, 2008 11:19 am 
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Joined: Sat Nov 03, 2007 10:43 am
Posts: 38
Location: France
Quote:
what is your os?
what is your mainboard? efika?
Os is not revelant. This come from serial console at boot.

And for the mobo, it is an efika.


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PostPosted: Mon Feb 11, 2008 2:02 pm 
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Site Admin

Joined: Fri Sep 24, 2004 1:39 am
Posts: 1589
Location: Austin, TX
Quote:
Hi,

Here is a little trouble with radeao video during boot. This is coming for the serial console. Serial console freezes after that... :/

EMULATION INT HANDLER ENTERED WITH:
INT NO: 15

EAX=0003 EBX=1111 ECX=2222 EDX=3333 ESP=0000 EBP=5555 ESI=6666 EDI=7777
AX=4E08 BX=C505 CX=0003 DX=102A SP=6CE9 BP=5555 SI=5D3D DI=7777
DS=C000 ES=BAD0 SS=C000 CS=F000 IP=FE15 NV UP -- PL ZR NA PE NC
CS:IP = F4 FS=BAD4 GS=BAD5C646 C000 0244 3000 0000 01B4 B08E 0200
UNHANDLED INT 10 FUNCTION 0007 WITHIN EMULATION
VM using 1652891 x86 cycles for GFX init

Czk.
That you have a graphics card, and a keyboard no doubt, means the serial console is going to be turned off in favor of using a real display and a local input device. If you need to use the serial console on boot, look at the article on the left side of the Power Developer home page, and replace the address with /builtin/serial - it works just as well.

As for the unhandled interrupt emulation, ignore it. It looks scary but it's completely harmless and is just leftover debugging information. The effect of not handling that interrupt is net zero.

_________________
Matt Sealey


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PostPosted: Tue Feb 12, 2008 2:06 am 
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Joined: Mon Jan 30, 2006 7:24 am
Posts: 43
Location: Budapest, Hungary
Quote:
UNHANDLED INT 10 FUNCTION 0007 WITHIN EMULATION
Interpreting this message needs a bit of x86 assembly and low-level BIOS programming knowledge. Basically software interrupt no. 16 (INT 10H) is the entry point of all VGA/video BIOS functions. This function accepts arguments via x86 register set.

In our case 0007 is a 16 bit hexadecimal value, and it's put into the 16 bit AX register, before the call, to serve as argument for INT 10H. The AX register can be accessed as two 8 bit registers, as AH for the upper 8 bits, and AL for the lower 8 bits. So, 0007 means 00H for AH, and 07H for AL.

AH specifies the sub-function inside INT 10H to call. Sub-function 00H is Set Video Mode. AL contains which video mode to set: 07H is Text Mode 80x25. This sub-function has no return values, so not handling it doesn't affect code executed later.

So, basically the above message means, the VGA BIOS running in emulation tries to set the display to 80x25 text mode (which is the default on any PC), and it is unable to do so (due to the nature of the emulation i guess), but this is really harmless, since OF will set a proper video mode later in the startup sequence.

Hope this helps understanding what that message really means, and why is it harmless.


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PostPosted: Tue Feb 12, 2008 7:04 am 
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Joined: Sat Nov 03, 2007 10:43 am
Posts: 38
Location: France
EOM. :)


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