The PC / AT, introduced in 1984, had three 8-bit slots and five 16-bit slots, all running at the system clock speed of 6 MHz in the earlier models and 8 MHz in the last version of the computer.

IBM designed the 8-bit version as a buffered interface to the external bus of the Intel 8088 ( 16 / 8 bit ) CPU used in the original IBM PC and PC / XT, and the 16-bit version as an upgrade for the external bus of the Intel 80286 CPU used in the IBM AT.

In the end, the 68000 did retain a bus protocol compatibility mode for existing 6800 peripheral devices, and a version with an 8-bit data bus was produced.

The primary change from the 6502 was the addition of an 8-bit general purpose I / O port ( only six I / O pins were available in the most common version of the 6510 ).

An 8-bit data bus version of the 68000 ( i. e., the 68008 ) was intended for use in future 8-bit designs.

* VESA Advanced Feature Connector ( VAFC ), newer version of the above VFC that widens the 8-bit bus to either a 16-bit or 32-bit bus

image: Bloodwych in-game screenshot ( ZX Spectrum ). png | Single player mode on the 8-bit ZX Spectrum version.

Coding of Meantime was nearly finished and a beta version was produced, but full production of the game was canceled when the 8-bit computer game market went into decline.

It is a version of the Motorola 68000 with an 8-bit external data bus, as well as a smaller address bus.

With an optional RAM upgrade ( requires eight 120ns DIP chips ), the 4-bit version supports 640 × 480 in 8-bit color.

The game used code from the original 8-bit version with the blessing of Jon Freeman.

* Blue Max, a World War I flying game for the Commodore 64 and 8-bit Atari computers, had a similar isometric perspective and similar gameplay, and was described by one reviewer as " a souped-up version of Zaxxon.

There even was an Atari 8-bit version in the works.

The XEGS shipped with the Atari 8-bit version of Missile Command built in, Flight Simulator II, and Bug Hunt which was compatible with the light gun.

Krzysztof Dudek ported the original ZX Spectrum code to the 8-bit Atari in 2007, creating a much more authentic version of the game than the Tynesoft version, but kept the Rob Hubbard soundtrack.

Solaris was at one point going to be based on The Last Starfighter, while the Atari 8-bit version of The Last Starfighter was renamed Star Raiders 2.

After the original ZX Spectrum version, The Quill was ported to the Amstrad CPC, Commodore 64, Atari 8-bit family, and Apple II.

The 8-bit versions ( including the PC version, which was technically 16-bit ) lacked the two-player cooperative mode, instead having an alternating two-player mode.

* v1: Intended to support migration from 8-bit microcontrollers, it is a cut-down version of the v2 processor-wise.

These systems include the Atari 5200, Atari 7800, Atari 8-bit family ( and a graphically updated version for the Atari XEGS ), ColecoVision, Commodore 64, Commodore VIC-20 and MSX.

* Atari 8-bit – Graphically better than the 2600 version, the mazes actually resemble the arcade.

Originally it was headerless, being simply 8-bit µ-law-encoded data at an 8000 Hz sample rate.

Powering the system was an Atari SALLY 6502 ( Atari's slightly custom 6502, sometimes described as a " 6502C ") processor running at 1. 79 MHz, similar to the processor found in home computers ( Atari 8-bit, Apple II, Commodore 64 ) and other consoles ( Atari 5200 and Nintendo Entertainment System ).

A keyboard was developed, and the keyboard had an expansion port ( which was the SIO port from Atari's 8-bit computer line, though the 7800 could not run Atari computer programs ) allowed for the addition of peripherals such as disk drives and printers.

The Atari 8-bit family had their own Atari BASIC that was modified in order to fit on an 8 kB ROM cartridge.

The first working CCD made with integrated circuit technology was a simple 8-bit shift register.

It is believed that the 8-bit AVR architecture and first AVR microcontroller was conceived and designed by two students at the Norwegian Institute of Technology.

Reading Atari 8-bit 130kB or 180kB disks was possible as well with special software, but the standard Atari 8-bit 90kB format, which used FM rather than MFM encoding, could not be handled by the 1571 hardware without modifying the drive circuitry as the control line that determines if FM or MFM encoding is used by the disc controller chip was permanently wired to ground ( MFM mode ) rather than being under software control.

In 1968, DEC was developing a PDP machine that would be based on 8-bit bytes instead of 6-bit characters.

* Commodore DOS, which was used by 8-bit Commodore computers.

* Atari DOS, which was used by the Atari 8-bit family of computers.

This was an advanced 8-bit CPU design, having, among other things, limited 16-bit capabilities.

The Nova was one of the first 16-bit minicomputers and was a leader in moving to word lengths that were multiples of the 8-bit byte.

In the Alpha architecture, a byte was defined as an 8-bit datum, a word as a 16-bit datum, a longword as a 32-bit datum, a quadword as a 64-bit datum and an octaword as a 128-bit datum.

The Intel 4004 was a 4-bit processor released in 1971, but in 1973 the Intel 8080, an 8-bit processor, made the first personal computer, the Altair 8800, possible.

" Brooks responded " The most important single decision I ever made was to change the IBM 360 series from a 6-bit byte to an 8-bit byte, thereby enabling the use of lowercase letters.

In the early days of graphical web browsers, graphics cards with 8-bit buffers ( allowing only 256 colors ) were common and it was fairly common to make GIF images using the websafe palette.

This microprocessor was the first low-power CMOS processor chip, quite on a par with the 8-bit 6502 that was being built into the Apple II desktop computer at that time.

The is Nintendo's successor to the 8-bit Game Boy handheld game console, and was released on October 21, 1998 in Japan, November 18, 1998 in North America, November 23, 1998 in Europe and November 27, 1998 in Australia.

The first IBM drive, the 350 RAMAC, was approximately the size of two refrigerators and stored 5 million 6-bit characters ( the equivalent of 3. 75 million 8-bit bytes ) on a stack of 50 discs.

During the early 1960s, while also active in ASCII standardization, IBM simultaneously introduced in its product line of System / 360 the 8-bit Extended Binary Coded Decimal Interchange Code ( EBCDIC ), an expansion of their 6-bit binary-coded decimal ( BCDIC ) representation used in earlier card punches.

The use of 8-bit codes for digital telephony also caused 8-bit data octets to be adopted as the basic data unit of the early Internet.

The ELF file format is also used with the Atmel AVR ( 8-bit ), AVR32 and with Texas Instruments MSP430 microcontroller architectures.

* Enterprise ( computer ), an 8-bit home computer from the UK, also known as Flan and Elan

* There are two additional 8-bit accumulators, E and F. These can be concatenated to form a 16-bit accumulator called W. The existing 6809 16-bit accumulator, D, can also be concatenated with W to form a 32-bit accumulator Q.

The new machine also had a larger address space than the older mainframes, 24 bits addressing 8-bit bytes vs. a typical 18 bits addressing 36-bit words.

Although the 8080 was generally an 8-bit processor, it also had limited abilities to perform 16-bit operations: Any of the three 16-bit register pairs ( BC, DE, HL ) or SP could be loaded with an immediate 16-bit value ( using LXI ), incremented or decremented ( using INX and DCX ), or added to HL ( using DAD ).

I / O addressing could also sometimes employ the fact that the processor would output the same 8-bit port address to both the lower and the higher address byte ( i. e. IN 05h would put the address 0505h on the 16-bit address bus ).

In 1972, Intel launched the 8008, the first 8-bit microprocessor .< ref > using enhancement load PMOS logic ( demanding 14V, achieving TTL-compatibility by having V < sub > CC </ sub > at + 5V and V < sub > DD </ sub > at-9V )</ ref > It implemented an instruction set designed by Datapoint corporation with programmable CRT terminals in mind, that also proved to be fairly general purpose.

It was also available as the 80188, with an 8-bit external data bus.

Nintendo Power also listed it as the 20th best NES video game, and praised it for its " unique vertically scrolling stages, fun platforming, and infectious 8-bit tunes ", in spite of its " unmerciful difficulty ".

The IBM System / 360 has a 32-bit architecture with 16 general-purpose registers, but most of the System / 360 implementations actually use hardware that implemented a much simpler underlying microarchitecture ; for example, the System / 360 Model 30 had 8-bit data paths to the arithmetic logic unit ( ALU ) and main memory and implemented the general-purpose registers in a special unit of higher-speed core memory, and the System / 360 Model 40 had 8-bit data paths to the ALU and 16-bit data paths to main memory and also implemented the general-purpose registers in a special unit of higher-speed core memory.

To support lower-cost systems and control applications with smaller memory sizes, Motorola introduced the 8-bit compatible MC68008, also in 1982.

But then they expanded the line greatly with the introduction of the 65816, a fairly straightforward 16-bit upgrade of the original 65C02 that could also run in 8-bit mode for compatibility.

In 8-bit character sets such as Latin-1 and the other ISO 8859 sets, the first 32 characters of the " upper half " ( 128 to 159 ) are also control codes, known as the " C1 set " as opposed to the " C0 " set just described.

The 8086 was introduced during 1978 as a fully 16-bit extension of Intel's 8-bit based 8080 microprocessor and also introduced memory segmentation to overcome the 16-bit addressing barrier of such designs.

*: 8-bit accumulator ( A ) and flag bits ( F ) carry, zero, minus, parity / overflow, half-carry ( used for BCD ), and an Add / Subtract flag ( usually called N ) also for BCD

Like the refresh register, this register has also sometimes been used creatively ; in interrupt modes 0 and 1 it can be used as simply another 8-bit data register.

8-bit is also a term given to a generation of microcomputers in which 8-bit microprocessors were the norm.

Some older 8-bit computers, such as the Commodore PET 2001 or Kaypro II, also fit into this category.

Although the 8085 is an 8-bit processor, it also has some 16-bit operations.

He also appeared on This Spartan Life, a popular machinima that frequently uses 8-bit music, and he also discussed the topic.