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 Post subject: How does 0xB80000 is calculated in kernel.c?
PostPosted: Sat Apr 25, 2015 2:11 am 
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Joined: Fri Apr 24, 2015 1:25 pm
Posts: 14
Hi
in Bare Bones kernel.c, how did they calculate 0xB8000 as terminal buffer address?


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 Post subject: Re: How does kernel.c write into terminal?
PostPosted: Sat Apr 25, 2015 2:18 am 
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Joined: Sat Mar 31, 2012 3:07 am
Posts: 3976
Location: Chichester, UK
terminal_buffer is initialized in terminal_initialize:
Code:
terminal_buffer = (uint16_t*) 0xB8000;
This is the memory-mapped address of the video buffer.

I'm afraid that you are just cutting and pasting code without understanding it, which is not a fruitful occupation. Read up on how text mode works in a VGA adapter.


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