The 4MB frontierThe Pages Table can be as small as 4 bytes or as big as 4MB. However, its natural size is 4KB (one page frame) because that is the granularity of memory allocation.
A Pages Table of 4KB has 1024 entries which describes 1024 pages, that is, 4MB of physical memory. Hence 4MB becomes a "natural frontier" for physical memory.
Therefore, it sounds natural to establish that the machine's memory will be expandable in steps of 4MB. Besides, 4MB of static RAM is about $100 at today's prices... definitely a reasonable frontier!
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Homebuilt CPUs WebRing
JavaScript by Qirien Dhaela
Join the ring?
David Brooks, the designer of the Simplex-III homebrew computer, has founded the Homebuilt CPUs Web Ring. To join, drop David a line, mentioning your page's URL. He will then add it to the list.
You will need to copy this code fragment into your page.
Project start date: May 13 of 2009
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