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The Intel 8008 ("eight-thousand-eight" or "eighty-oh-eight") is an early 8-bit microprocessor capable of addressing 16 KB of memory, introduced in April 1972. The 8008 architecture was designed by Computer Terminal Corporation (CTC) and was implemented and manufactured by Intel.
An 8-bit register can store 2 8 different values. The range of integer values that can be stored in 8 bits depends on the integer representation used. With the two most common representations, the range is 0 through 255 (2 8 − 1) for representation as an binary number, and −128 (−1 × 2 7) through 127 (2 7 − 1) for representation as two's complement.
The full 16 rounds are used when the key size is longer than 80 bits. [3] Components include large 8×32-bit S-boxes based on bent functions, key-dependent rotations, modular addition and subtraction, and XOR operations. There are three alternating types of round function, but they are similar in structure and differ only in the choice of the ...
The Super-80 was based on the Zilog Z80 8-bit microprocessor. As standard, it had 16 kB of dynamic RAM in the form of eight 4116 RAM chips. RAM could be expanded to 32 kB or 48 kB through the addition of rows of eight 4116 RAM chips. The computer was assembled on a single double-sided printed circuit board.
For example, two 4-bit ALU chips could be arranged side by side, with control lines between them, to form an 8-bit ALU (result need not be power of two, e.g. three 1-bit units can make a 3-bit ALU, [2] thus 3-bit (or n-bit) CPU, while 3-bit, or any CPU with higher odd number of bits, hasn't been manufactured and sold in volume). Four 4-bit ALU ...
However, Rob Pike's paper on the Blit explains that it was named after the second syllable of bit blit, a common name for the bit-block transfer operation that is fundamental to the terminal's graphics. [2] Its original nickname was Jerq, inspired by a joke used during a demo of a Three Rivers' PERQ graphic workstation and used with permission. [3]
1986: The TMS34010 is a general purpose 32-bit processor with built-in instructions, including PIXBLT (Pixel Block Transfer), for manipulating bitmap data. It is optimized for cases that would take extra processing if implemented in software, such as handling transparent pixels, working with non-byte aligned data, and converting between bit depths.
I (bit 7) is the IRQ disable bit. A (bit 8) is the imprecise data abort disable bit. E (bit 9) is the data endianness bit. IT (bits 10–15 and 25–26) is the if-then state bits. GE (bits 16–19) is the greater-than-or-equal-to bits. DNM (bits 20–23) is the do not modify bits. J (bit 24) is the Java state bit. Q (bit 27) is the sticky ...