|
Timex Computer 3256
The TC 3256 or Timex Computer 3256 was a 1987 computer created by Timex of Portugal, a branch of Timex Corporation. It was a third generation Sinclair ZX Spectrum compatible computer, with expanded capabilities and new ''TEC - Timex Extended Commands'' BASIC commands supporting the AY-3-8912 sound chip, RS-232 network and the 512x192 pixel high resolution graphic mode. Besides the legacy Sinclair BASIC, the ROM included a word processor (''Timeword''), Timex Extended Basic (with support for the ''Tenet'' network, floppy disks and RAM drive) and a CP/M terminal emulator. RAM was expanded to 256kb. At least one prototype was built, but the machine never reached the market due to Timex of Portugal shutting down its production line before its release. Technical specifications CPU *Zilog Z80A ROM * 64K **16K Sinclair BASIC **16K Timeword text processor **16K Timex Extended Basic (''Tenet'', disk, RAM drive) **16K CP/M terminal emulator RAM * 256K ** 208K RAM drive * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Terminal Emulator
A terminal emulator, or terminal application, is a computer program that emulates a video terminal within some other display architecture. Though typically synonymous with a shell or text terminal, the term ''terminal'' covers all remote terminals, including graphical interfaces. A terminal emulator inside a graphical user interface is often called a terminal window. A terminal window allows the user access to a text terminal and all its applications such as command-line interfaces (CLI) and text user interface (TUI) applications. These may be running either on the same machine or on a different one via telnet, ssh, dial-up, or over a direct serial connection. On Unix-like operating systems, it is common to have one or more terminal windows connected to the local machine. Terminals usually support a set of escape sequences for controlling color, cursor position, etc. Examples include the family of terminal control sequence standards known as ECMA-48, ANSI X3.64 or ISO/IEC 6 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ZX Spectrum Clones
ZX may refer to: Arts and entertainment * Kamen Rider ZX (pronounced "Zed-Cross"), the tenth fictional superhero in the "Kamen Rider" franchise * ''Mega Man ZX'', a video game for the Nintendo DS * ''ZX Tunes'', remastered soundtracks of the "Mega Man ZX" game * ''Z/X'', Japanese collectible card game Businesses and brands * ZX Auto, also known as Zitsubishi, a Chinese SUV and truck manufacturer * Air Georgian (IATA airline code ZX) * Chinasat, a family of communications satellites (from the transliteration, Zhongxing) * Citroën ZX, a car model * Kawasaki Ninja series motorcycles (model designation codes ZX and ZX-R) * ZX80, ZX81 and ZX Spectrum, home computers produced by Sinclair {{disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kempston Micro Electronics
Kempston Micro Electronics was an electronics company based in Kempston, Bedfordshire, England specialising in computer joysticks and related home computer peripherals during the 1980s. The Kempston Interface, a peripheral which allowed a joystick using the ''de facto'' Atari joystick port standard to be connected to the ZX Spectrum, was one of the most widely used add-ons to the machine. Interface Kempston joystick interface Kempston Interface plugged into a Spectrum Plus The Kempston Interface is a joystick interface used on the Sinclair ZX Spectrum series of computers that allows controllers complying with the ''de facto'' Atari joystick port standard (using the DE-9 connector) to be used with the machine. The interface itself would be attached to the computer's rear expansion port with a single joystick port on the front or top of the system. Apart from implementing existing joystick interfacing modes they produced their own standard which delivered the joystick sta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Composite Video
Composite video is an analog video signal format that carries standard-definition video (typically at 525 lines or 625 lines) as a single channel. Video information is encoded on one channel, unlike the higher-quality S-Video (two channels) and the even higher-quality component video (three or more channels). In all of these video formats, audio is carried on a separate connection. Composite video is also known by the initials CVBS for composite video baseband signal or color, video, blanking and sync, or is simply referred to as ''SD video'' for the standard-definition television signal it conveys. There are three dominant variants of composite video signals, corresponding to the analog color system used: NTSC, PAL, and SECAM. Usually composite video is carried by a yellow RCA connector, but other connections are used in professional settings. Signal components A composite video signal combines, on one wire, the video information required to recreate a color picture, a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
RF Modulator
An RF modulator (or radio frequency modulator) is an electronic device whose input is a baseband signal which is used to modulate a radio frequency source. RF modulators are used to convert signals from devices such as media players, VCRs and game consoles to a format that can be handled by a device designed to receive a modulated RF input, such as a radio or television receiver. History Prior to the introduction of specialised video connector standards such as SCART, TVs were designed to only accept signals through the aerial connector: signals originate at a TV station, are transmitted over the air, and are then received by an antenna and demodulated within the TV. When equipment was developed which could use a television receiver as its display device, such as VCRs, DVD players, early home computers, and video game consoles, the signal was modulated and sent to the RF input connector. The aerial connector is standard on all TV sets, even very old ones. Since later tele ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cassette Tape
The Compact Cassette or Musicassette (MC), also commonly called the tape cassette, cassette tape, audio cassette, or simply tape or cassette, is an analog magnetic tape recording format for audio recording and playback. Invented by Lou Ottens and his team at the Dutch company Philips in 1963, Compact Cassettes come in two forms, either already containing content as a prerecorded cassette (''Musicassette''), or as a fully recordable "blank" cassette. Both forms have two sides and are reversible by the user. Although other tape cassette formats have also existed - for example the Microcassette - the generic term ''cassette tape'' is normally always used to refer to the Compact Cassette because of its ubiquity. Its uses have ranged from portable audio to home recording to data storage for early microcomputers; the Compact Cassette technology was originally designed for dictation machines, but improvements in fidelity led to it supplanting the stereo 8-track cartridge and reel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ROM Cartridge
A ROM cartridge, usually referred to in context simply as a cartridge, cart, or card, is a replaceable part designed to be connected to a consumer electronics device such as a home computer, video game console or, to a lesser extent, electronic musical instruments. Read-Only Memory, ROM cartridges allow users to rapidly load and access programs and data alongside a floppy drive in a home computer; in a video game console, the cartridges are standalone. At the time around their release, ROM cartridges provided security against Software copyunauthorised copying of software. However, the manufacturing of ROM cartridges was more expensive than floppy disks, and the storage capacity was smaller. ROM cartridges and slots were also used for various hardware accessories and enhancements. The widespread usage of the ROM cartridge in video gaming applications has led it to be often colloquially called a game cartridge. History ROM cartridges were popularized by early home computer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
PC Speaker
A PC speaker is a loudspeaker built into some IBM PC compatible computers. The first IBM Personal Computer, model 5150, employed a standard 2.25 inch magnetic driven (dynamic) speaker. More recent computers use a tiny moving-iron or piezo speaker instead. The speaker allows software and firmware to provide auditory feedback to a user, such as to report a hardware fault. A PC speaker generates waveforms using the programmable interval timer, an Intel 8253 or 8254 chip. Use cases BIOS/UEFI error codes The PC speaker is used during the power-on self-test (POST) sequence to indicate errors during the boot process. Since it is active before the graphics card, it can be used to communicate "beep codes" related to problems that prevent the much more complex initialization of the graphics card to take place. For example, the Video BIOS usually cannot activate a graphics card unless working RAM is present in the system while beeping the speaker is possible with just R ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ZX Spectrum Graphic Modes
The ZX Spectrum is generally considered to have limited graphical capabilities in comparison to some other home computers of the same era such as the Commodore 64, largely due to its lack of a dedicated graphics chip. Nevertheless, throughout its commercial life and later activity on the demoscene, various techniques have been developed to provide (or emulate) improvements to the Spectrum's graphical output. Colour palette The ZX Spectrum (and compatibles) computers uses a variation of the 4-bit RGBI palette philosophy (also used on CGA, Thomson MO5, Sharp MZ-800, Mattel Aquarius, etc.) resulting in 8 basic colours with brightness variations. This results in each of the colours of the 3-bit palette having a ''basic'' and ''bright'' variant, with the exception of black. The ''bright'' half of the palette is generated using the video displays' maximum voltage levels for each of the three Red, Green and Blue (RGB) components that a colour uses. The ''basic'' half of the palet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Random-access Memory
Random-access memory (RAM; ) is a form of computer memory that can be read and changed in any order, typically used to store working Data (computing), data and machine code. A Random access, random-access memory device allows data items to be read (computer), read or written in almost the same amount of time irrespective of the physical location of data inside the memory, in contrast with other direct-access data storage media (such as hard disks, CD-RWs, DVD-RWs and the older Magnetic tape data storage, magnetic tapes and drum memory), where the time required to read and write data items varies significantly depending on their physical locations on the recording medium, due to mechanical limitations such as media rotation speeds and arm movement. RAM contains multiplexer, multiplexing and demultiplexing circuitry, to connect the data lines to the addressed storage for reading or writing the entry. Usually more than one bit of storage is accessed by the same address, and RAM ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
