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2. RAM limit - Wikipedia

   en.wikipedia.org/wiki/RAM_limit

   The Intel 8080 used by these computers was an 8-bit processor, with 16-bit address space, which allowed it access up to 64 KB of memory; .COM executables used with CP/M have a maximum size of 64 KB due to this, as do those used by DOS operating systems for 16-bit microprocessors.

3. Binary prefix - Wikipedia

   en.wikipedia.org/wiki/Binary_prefix

   The 5.25-inch diskette sold with the IBM PC AT could hold 1200 × 1024 = 1 228 800 bytes, and thus was marketed as "1200 KB" with the binary sense of "KB". [39] However, the capacity was also quoted "1.2 MB", [ 40 ] which was a hybrid decimal and binary notation, since the "M" meant 1000 × 1024.

4. Orders of magnitude (data) - Wikipedia

   en.wikipedia.org/wiki/Orders_of_magnitude_(data)

   524,288 bits (64 kibibytes) – RAM capacity of popular 8-bit computers like the C-64, Amstrad CPC etc. 10 6: megabit (Mbit) 1,000,000 bits 2 20: mebibit (Mibit) 1,048,576 bits (128 kibibytes) – RAM capacity of popular 8-bit computers like the C-128, Amstrad CPC etc. Or a 1024 x 768 pixel JPEG image.

5. Units of information - Wikipedia

   en.wikipedia.org/wiki/Units_of_information

   Historically, a byte was the number of bits used to encode a character of text in the computer, which depended on computer hardware architecture, but today it almost always means eight bits – that is, an octet. An 8-bit byte can represent 256 (2 8) distinct values, such as non-negative integers from 0 to 255, or signed integers from −128 to ...

6. Megabyte - Wikipedia

   en.wikipedia.org/wiki/Megabyte

   In this convention, one thousand and twenty-four megabytes (1024 MB) is equal to one gigabyte (1 GB), where 1 GB is 1024 3 bytes (i.e., 1 GiB). Mixed 1 MB = 1 024 000 bytes (= 1000×1024 B) is the definition used to describe the formatted capacity of the 1.44 MB 3.5-inch HD floppy disk , which actually has a capacity of 1 474 560 bytes .

7. Memory management unit - Wikipedia

   en.wikipedia.org/wiki/Memory_management_unit

   A 68451 MMU, which could be used with the Motorola 68010. A memory management unit (MMU), sometimes called paged memory management unit (PMMU), [1] is a computer hardware unit that examines all memory references on the memory bus, translating these requests, known as virtual memory addresses, into physical addresses in main memory.

8. Conventional memory - Wikipedia

   en.wikipedia.org/wiki/Conventional_memory

   For example, if there was a 50 KB UMB and a 10 KB UMB, and programs needing 8 KB and 45 KB were loaded, the 8 KB might go into the 50 KB UMB, preventing the second from loading. Later versions of DOS allowed the use of a specific load address for a driver or TSR, to fit drivers/TSRs more tightly together.

9. 64-bit computing - Wikipedia

   en.wikipedia.org/wiki/64-bit_computing

   The term 64-bit also describes a generation of computers in which 64-bit processors are the norm. 64 bits is a word size that defines certain classes of computer architecture, buses, memory, and CPUs and, by extension, the software that runs on them. 64-bit CPUs have been used in supercomputers since the 1970s (Cray-1, 1975) and in reduced ...