Talk:VGA Hardware: Difference between revisions
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I'm proof-reading it :-)<br />
Let me know if you'd rather me use British English instead of American English.<br />
- [[User:Renagadexx|Jack]] 17:23, 14 October 2011 (UTC)
== Detection ==
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Well i have had a good search. Unfortunately it really is all so device independent that it is impossible to tell. I do recall once reading some kernel source code that verified a colour system was being used in it's initialisation routine. Unfortunately i have misplaced the code so if anyone comes across it, i think it may be used as such. I will keep searching. --[[User:Tyler|Tyler]] 10:08, 2 February 2007 (CST)
: For PCI cards you can probe the class and subclass; if the device class is 0x03 and the subclass is 0x01, then it is VGA compatible; there are no guarantees for any other subclasees (i.e. it might be VGA compatible or it might not).[[User:Clearer|Clearer]] 08:46, 16 December 2011 (UTC)
== Memory layout stuff ==
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'' This section needs a rewrite. Chain4 mode is perfectly normal function of VGA that standard BIOS 0x13 mode relies on for it's "linear" addressing. Basicly, when chain4 is set, lowest 2 bits of memory access address select the plane, and the address is shifted 2 bits down. The memory organization (as far as display goes) is always planar (like Mode-X) but the special mapping that is chain4 mode makes it appear linear. As such, I find it highly unlikely that the data about chain4 support below is correct. [[User:Mystran|Mystran]] 09:25, 9 December 2007 (CST)''
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