It seems to use ports 70 and 71, but I don't know the exact implementation method. Please advise if anyone knows.
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中国DOS联盟论坛 » DOS开发编程 & 发展交流 （开发室） » How to programmatically access the 64K BIOS contents under DOS?
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Posted 2004-02-16 00:00 · 中国 广东 深圳 龙岗区 电信
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Posted 2004-02-20 00:00 · 中国 广东 深圳 南山区 电信
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I/O 70 and 71 are the port addresses for accessing CMOS RAM. Usually, after booting is finished, the BIOS contents are automatically mapped to the highest end of the virtual address space, such as FFFF0000h~FFFFFFFFh. You only need to switch to protected mode to access this address range!
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DOS，永远的初恋情人。
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