Re: Generic VESA framebuffer driver and Video card BOOT?
From: Kendall Bennett <hidden>
Date: 2004-10-21 19:52:36
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Pavel Machek [off-list ref] wrote:
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Yes, but there is only a very small set of PC hardware features you need to implement, and most BIOS'es only look at those things for timing purposes. Unfortunately there is no standard for how BIOS'es do internal timing and delay loops, so we emulate them all (8253 timers, speaker ports and CMOS time/date support ;-).Hmm, that does not seem that bad. Did you need to emulate interrupt controller, too? That one seemed most scary to me.
No. Only software interrupts. The BIOS never deals with hardware interrupts since there is no standard, reliable way to hook them from real mode so it never uses them ;-) Regards, --- Kendall Bennett Chief Executive Officer SciTech Software, Inc. Phone: (530) 894 8400 http://www.scitechsoft.com ~ SciTech SNAP - The future of device driver technology! ~ ------------------------------------------------------- This SF.net email is sponsored by: IT Product Guide on ITManagersJournal Use IT products in your business? Tell us what you think of them. Give us Your Opinions, Get Free ThinkGeek Gift Certificates! Click to find out more http://productguide.itmanagersjournal.com/guidepromo.tmpl