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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 Gigatron TTL is a retro-style 8-bit computer, where the CPU is implemented by a set of TTL chips instead of a single microprocessor, imitating the hardware present in early arcades. Its target is the computing enthusiasts , for studying or hobby purposes.
The July 1974 issue of Radio-Electronics: "Build The Mark-8: Your Personal Minicomputer". [1] [2] The Mark-8 is a microcomputer design from 1974, based on the Intel 8008 CPU (which was the world's first 8-bit microprocessor). The Mark-8 was designed by Jonathan Titus, a Virginia Tech graduate student in chemistry.
Atari 8-bit computer games (4 C, 635 P) Atari Program Exchange software (17 P) O. Optimized Systems Software (5 P) Pages in category "Atari 8-bit computer software"
The channel is known for its videos on restoration of old computers, [12] [13] and demonstration of old technology. [14] [15] Murray has also developed video games designed to run on old computers, including Planet X1 for the VIC-20, [16] Planet X2 for Commodore 64, [17] [18] Planet X3 for MS-DOS [19] [20] [21] and Attack of the PETSCII Robots for the Commodore PET (since ported to other ...
The original 6800 included two 8-bit accumulators, A and B, a single 16-bit index register, X, a 16-bit program counter, PC, a 16-bit stack pointer, SP, and an 8-bit status register. The 6809 added a second index register, Y, a second stack pointer, U (while renaming the original S), and allowed the A and B registers to be treated as a single ...
The 14-bit words are chosen such that binary ones are always separated by a minimum of two and a maximum of ten binary zeros. This is because bits are encoded with NRZI encoding , or modulo -2 integration, so that a binary one is stored on the disc as a change from a land to a pit or a pit to a land, while a binary zero is indicated by no change.
NEC μPD70008 8 MHz 64 KB 48 KB No Yes Yes No FM (YM2203) Mono: Yes No No 88FR CPU upgrade. model30（B）is black color model. model 20 1× 5.25" 2D model 30 2× 5.25" 2D PC-8801 MH NEC μPD70008 8 MHz 192 KB 48 KB No Yes Yes No FM (YM2203) Mono: Yes 2× 5.25" 2HD No 88MR CPU upgrade 1987 PC-88 VA NEC μPD9002 8 MHz 512 KB 256 KB No Yes Yes Yes