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  2. 8-bit computing - Wikipedia

    en.wikipedia.org/wiki/8-bit_computing

    The Commodore 128, and other 8-bit systems, meaning still with 16-bit addressing, could use more than 64 KB, i.e. 128 KB RAM, also the BBC Master with it expandable to 512 KB of RAM. While in general 8-bit CPUs have 16-bit addressing, in some architectures you have both, such as in the MOS Technology 6502 CPU, where the zero page is used ...

  3. Intel 8008 - Wikipedia

    en.wikipedia.org/wiki/Intel_8008

    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.

  4. Intel 8080 - Wikipedia

    en.wikipedia.org/wiki/Intel_8080

    All 8-bit operations with two operands can only be performed on the 8-bit accumulator (the A register). The other operand can be either an immediate value, another 8-bit register, or a memory byte addressed by the 16-bit register pair HL. Increments and decrements can be performed on any 8 bit register or an HL-addressed memory byte.

  5. 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.

  6. ATmega328 - Wikipedia

    en.wikipedia.org/wiki/ATmega328

    The Atmel 8-bit AVR RISC-based microcontroller combines 32 KB ISP flash memory with read-while-write capabilities, 1 KB EEPROM, 2 KB SRAM, 23 general-purpose I/O lines, 32 general-purpose working registers, 3 flexible timer/counters with compare modes, internal and external interrupts, serial programmable USART, a byte-oriented 2-wire serial ...

  7. Signetics 2650 - Wikipedia

    en.wikipedia.org/wiki/Signetics_2650

    It contained everything the 2650 lacked to make a complete computer: 2 KB 8-bit mask-programmed ROM program memory; 128 bytes 8-bit RAM memory; Clock generator with crystal or RC network; Power-on reset; Eight general purpose I/O pins; The I/O pins could be used as an 8-bit I/O port or programmed to generate enable signals for extra RAM, ROM or ...

  8. COP8 - Wikipedia

    en.wikipedia.org/wiki/COP8

    The CPU has an 8-bit accumulator and 15-bit program counter. 16 additional 8-bit registers (R0–R15) and an 8-bit program status word are memory mapped. There are special instructions to access them, but general RAM access instructions may also be used. The memory map is divided into half RAM and half control registers as follows:

  9. Minimal instruction set computer - Wikipedia

    en.wikipedia.org/wiki/Minimal_instruction_set...

    The implemented CPU instructions should by default not support a wide set of inputs, so this typically means an 8-bit or 16-bit CPU. If a CPU has an NX bit, it is more likely to be viewed as being a complex instruction set computer (CISC) or reduced instruction set computer (RISC). MISC chips typically lack hardware memory protection of any ...

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