Question

page addressing

(a) The following are virtual 16 Considered bit-addresses, with the upper 8th Bit the number of the page and the lower one 8th Bit represent the offset.

The physical memory included in this example 256 Page frames ( frames ) to each 256 Bytes per page, ie physical addresses from 0x0000 to 0xFFFF, where frame 0 at 0x0000 starts.

Given the following page table for a process that 10 Pages (page numbers 0 - 9), some of which are currently not loaded in main memory (--):

Page Number:	0	1	2	3	4	5	6	7	8th	99
Border:	120	121	122	--	241	250	--	224	218	219

For the following virtual addresses of the process, specify the appropriate physical addresses in hexadecimal format if the addresses are translatable:

Virtual address:	0x04F0	0x0056	0x0666	0x09FF	0x7800
Physical address:	?	?	?	?	?

For each non-translatable address, specify what type of exception occurs when the process attempts to read that address.

(b) The following is a page size of 1024 Bytes gone out. The virtual address space includes 256 Pages.

• Which bit length has a virtual address (with byte-wise addressing)?

• What is the size of the page table for each process (in bytes), if each entry is a size of 4 Byte has?

Answer 1