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Encyclopedia > Yamaha V9958

The Yamaha V9958 is a Video Display Processor (VDP) used in MSX 80s home computers. More specifically, the "TIM" upgrade to the TI-99/4A, MSX 2+ and MSX turbo R. The Video Display Processor (VDP) of a computer is a dedicated processor that takes care of the video output of the system. ... Sony MSX 1, Model HitBit-10-P MSX was the name of a standardized home computer architecture in the 1980s. ... The examples and perspective in this article or section may not represent a worldwide view. ... The Texas Instruments TI-99/4A was an early home computer, released in June 1981, originally at a price of $525. ... MSX is the name of a standard for home computers in the 1980s (see also The Home Computer Era in the History of computing hardware). ... MSX is the name of a standard for home computers in the 1980s (see also The Home Computer Era in the History of computing hardware). ...


The Yamaha V9958, also known as MSX-Video, is the successor of the Yamaha V9938 (used in the Myarc Geneve 9640 upgrade for the TI-99/4A and the MSX2). It was generally conceived not to be a very major upgrade to its predecessor, which hampered its adoption. The main new features are three graphical YJK modes (with up to 19268 colours) and horizontal scrolling registers. A Video Display Processor (VDP) used in MSX 80s home computers. ... The Geneve 9640 is an enhanced TI-99/4A clone which was built by Myarc as a card to fit into the TI Peripheral Expansion System and used an IBM PC XT detached keyboard as well as a mouse. ... The Texas Instruments TI-99/4A was an early home computer, released in June 1981, originally at a price of $525. ... MSX2 may refer to: The second generation of the MSX home computers Homeo box homolog 2 Protein This article consisting of a 4-letter acronym or initialism is a disambiguation page — a list of pages that otherwise might share the same title. ...


Specifications

  • Video RAM: 128 KB + 64 KB of expanded VRAM
  • Text modes: 80 x 24 and 32 x 24
  • Resolution: 512 x 212 (16 colours out of 512) and 256 x 212 (19268 colours)
  • Sprites: 32, 16 colours, max 8 per horizontal line
  • Hardware acceleration for copy, line, fill, etc.
  • Interlacing to double vertical resolution
  • Horizontal and vertical scroll registers

VRAM an acronym for Video RAM. Generally a term used in computers to describe RAM dedicated to the purpose of displaying bitmap graphics in raster graphics hardware. ... It has been suggested that this article or section be merged with List of common resolutions. ... In computer graphics, a sprite (also known by other names; see Synonyms below) is a two-dimensional image or animation that is integrated into a larger scene. ... In computing, hardware acceleration is the use of of hardware to perform some function faster than is possible in software running on the normal CPU. Examples of hardware acceleration include blitting acceleration functionality in graphics processing units (GPUs) and instructions for complex operations in CPUs. ... Interlacing is a method of displaying images on a raster-scanned display device, such as a cathode ray tube (CRT). ...

Detailed specifications

For detailed specifications, please refer to the Yamaha V9938 page, with the following additions: A Video Display Processor (VDP) used in MSX 80s home computers. ...

  • Horizontal scrolling registers
  • YJK graphics modes (similar to YUV)
    • G7 + YJK + YAE: 256 x 212, 12499 colours + 16 colour palette
    • G7 + YJK: 256 x 212, 19268 colours
  • Ability to execute hardware accelerated commands in non-bitmap screen modes
  • Mouse and trackball functions from V9938 were removed

Example of U-V color plane, Y value = 0. ... In computing, hardware acceleration is the use of of hardware to perform some function faster than is possible in software running on the normal CPU. Examples of hardware acceleration include blitting acceleration functionality in graphics processing units (GPUs) and instructions for complex operations in CPUs. ... Operating a mechanical 1: Pulling the mouse turns the ball. ... Logitech TrackMan A trackball is a pointing device consisting of a ball housed in a socket containing sensors to detect rotation of the ball about two axes—like an upside-down mouse with an exposed protruding ball. ...

MSX-specific terminology

On MSX, the screen modes are often referred to by their assigned number in MSX-Basic. This mapping is as follows:

Basic mode VDP mode MSX system
Screen 0 (width 40) T1 MSX 1
Screen 0 (width 80) T2 MSX 2
Screen 1 G1 MSX 1
Screen 2 G2 MSX 1
Screen 3 MC MSX 1
Screen 4 G3 MSX 2
Screen 5 G4 MSX 2
Screen 6 G5 MSX 2
Screen 7 G6 MSX 2
Screen 8 G7 MSX 2
Screen 10 G7 with YJK and YAE MSX 2+ and tR
Screen 11 G7 with YJK and YAE MSX 2+ and tR
Screen 12 G7 with YJK MSX 2+ and tR

  Results from FactBites:
 
Yamaha V9958 — Википедия (208 words)
Yamaha V9958 — электронный компонент, микросхема видеоконтроллера (VDP, Video Display Processor), разработанная компанией Yamaha в 1988 году.
Основные отличия V9958 от V9938 заключаются в наличии трёх новых растровых видеорежимов с моделью представления цвета YJK (до 19268 цветов) и наличии регистров горизонтальной прокрутки экрана.
V9958 MSX-Video Technical Data Book — оригинальная документация на микросхему V9958
Yamaha V9938: Information from Answers.com (403 words)
The Yamaha V9938 was a Video Display Processor (VDP) used in the Geneve 9640 enhanced TI-99/4A clone, as well as MSX 80s home computers (more specifically, the MSX 2).
Yamaha V9938, also known as MSX-Video, is the successor of the Texas Instruments TMS9918 (used in the MSX1).
The V9938 was in turn succeeded by the Yamaha V9958.
  More results at FactBites »

 
 

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