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Interrupts Interrupts
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Old 11-22-2008, 09:50 PM
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Question Interrupts
Can anyone tell me what the interrupt 0x10 is used for?I know that 0x33 is used for the mouse.
I also know that r.x.cx &r.x.c.dx is used to find the x & y coordinates of the mouse but I have no idea about 'r.h.ah=0x0d','r.h.ah=0x00'.
If there are any websites on the net which talk about these things please do mention it.
P.s I use an old turbo c++ compiler with the bgi interface,so these things are used only in that environnment.
Thanks.
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Old 11-22-2008, 11:45 PM
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Default Re: Interrupts
DOS isn't very common these days.
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Old 11-22-2008, 11:51 PM
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Default Re: Interrupts
int 10h is for VGA display. Its the standard bios interrupt for pixel plotting, text functions, VESA extensions, ect...

Google Ralf Browns interrupt list.
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Old 11-23-2008, 04:04 AM
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Default Re: Interrupts
Check this page for interrupt information.
Interrupt Jump Table
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Old 11-23-2008, 04:12 AM
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Default Re: Interrupts
It's also very slow. I can show you how to write directly to video memory if you like. Note that calling an interrupt in a 32-bit program in Windows will result in an access violation error.

AH=00 sets the video mode to the mode contained in AL.
AH=0d reads the color value of the pixel specified in page BH, column CX, row DX.
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Old 11-23-2008, 05:03 PM
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Talking Re: Interrupts
I know that dos is dead but programming in dos is a very good learning experience.Many thanks to outsid3r for the interrupt jump table.Thats a lot of interrupts.
Thanks
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Old 11-23-2008, 05:05 PM
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Default Re: Interrupts
Writing 16-Bit code is a good learning experience? In what way?

If you want to do 16-Bit coding learn 16 Bit x86 Assembly and then focus your C/C++ efforts to 32 Bit coding.
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Old 11-23-2008, 05:10 PM
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Default Re: Interrupts
I wholeheartedly agree with you there. I loved DOS programming before I realized that I was better off using libraries.
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Old 11-23-2008, 05:49 PM
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Default Re: Interrupts
I love System programming Nothing funner. If you want, I can provide you with C++ classes for VGA & Vesa
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Old 11-23-2008, 05:51 PM
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Default Re: Interrupts
I'm writing this with C, not C++, but I'd love to see them anyway.
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