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mit-pdos / xv6-book

Commentary for xv6-public
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Changing the device memory size in mem.t #20

Open tzerbib opened 5 years ago

tzerbib commented 5 years ago

Top of memory is at 0xFFFFFFFF (4Gbyte) and device memory start at 0xFE000000 (according to fig. 2.2 known as xv6_layout). So 0xFFFFFFFF - 0xFE000000 = 0x01FFFFFF (32 Mbyte).