2607:FEA8:4500:E0:91A9:3BDC:C9C2:49E8 at 02:17, 30 June 2025

2025-06-30T02:17:22Z

← Previous revision		Revision as of 02:17, 30 June 2025
Line 3:		Line 3:
	[[File:V9958 02.jpg\|thumb\|300px\|Yamaha V9958 in ceramic package]]		[[File:V9958 02.jpg\|thumb\|300px\|Yamaha V9958 in ceramic package]]

	The '''Yamaha V9958'''<ref>{{Cite book \|url=https://books.google.com/books?id=8RwSAQAAMAAJ&dq=%22Yamaha+V9958%22+-wikipedia&pg=PA3984 \|title=IC Master \|date=2001 \|publisher=United Technical Publications \|language=en}}</ref><ref>{{Cite thesis \|title=Arqueología informática: los ordenadores MSX en los inicios de la microinformática doméstica \|url=https://riunet.upv.es/handle/10251/70909 \|publisher=Universitat Politècnica de València \|date=2016-10-03 \|degree=Proyecto/Trabajo fin de carrera/grado \|first=Sergio \|last=Martín Sesma}}</ref><ref>{{Cite web \|last=Redazione \|date=2008-10-20 \|title=MSX - Vari Costruttori- 1983 \|url=https://www.cyberludus.com/2008/10/msx-vari-costruttori-1983/ \|access-date=2022-11-13 \|website=CyberLudus.com \|language=it-IT}}</ref> is a [[Video Display Processor]] used in the [[MSX2+]]<ref>{{Cite journal \|last=Alex \|first=Wulms \|date=1995 \|title=Schermen op MSX - De 2+ schermen \|url=http://www.msxarchive.nl/pub/msx/mirrors/hanso/hwdoityourself/msxplus.pdf \|journal=MSX Computer & Club Magazine \|issue=72}}</ref> and [[MSX turbo R]] series of home computers, as the successor to the [[Yamaha V9938]] used in the MSX2. The main new features are three graphical [[YJK]]<ref>{{Cite web \|last=MSX Licensing Corporation \|date=2022 \|title=The YJK screen modes \|url=http://map.grauw.nl/articles/yjk/ \|website=MSX Assembly Page}}</ref><ref>{{Cite book \|last=Niemietz \|first=Ricardo Cancho \|url=http://rs.gr8bit.ru/Documentation/Issues-on-YJK-colour-model-implemented-in-Yamaha-V9958-VDP-chip.pdf \|title=Issues on YJK colour model implemented in Yamaha V9958 VDP chip \|year=2014}}</ref><ref>{{Cite web \|title=VCFe Vortrag vom 2016.04.30 - Homecomputer und Spielkonsolen - Videoarchitekturen als visuelles Medium \|url=http://neil.franklin.ch/Articles/20160430_VCFe_Video_als_Medium.html \|access-date=2022-11-13 \|website=neil.franklin.ch}}</ref> modes with up to 19268 colors and horizontal scrolling registers. The V9958 was not as widely adopted as the V9938.		The '''Yamaha V9958'''<ref>{{Cite book \|url=https://books.google.com/books?id=8RwSAQAAMAAJ&dq=%22Yamaha+V9958%22+-wikipedia&pg=PA3984 \|title=IC Master \|date=2001 \|publisher=United Technical Publications \|language=en}}</ref><ref>{{Cite thesis \|title=Arqueología informática: los ordenadores MSX en los inicios de la microinformática doméstica \|url=https://riunet.upv.es/handle/10251/70909 \|publisher=Universitat Politècnica de València \|date=2016-10-03 \|degree=Proyecto/Trabajo fin de carrera/grado \|first=Sergio \|last=Martín Sesma}}</ref><ref>{{Cite web \|last=Redazione \|date=2008-10-20 \|title=MSX - Vari Costruttori- 1983 \|url=https://www.cyberludus.com/2008/10/msx-vari-costruttori-1983/ \|access-date=2022-11-13 \|website=CyberLudus.com \|language=it-IT}}</ref> is a [[Video Display Processor]] used in the [[MSX2+]]<ref>{{Cite journal \|last=Alex \|first=Wulms \|date=1995 \|title=Schermen op MSX - De 2+ schermen \|url=http://www.msxarchive.nl/pub/msx/mirrors/hanso/hwdoityourself/msxplus.pdf \|journal=MSX Computer & Club Magazine \|issue=72}}</ref> and [[MSX turbo R]] series of home computers, as the successor to the [[Yamaha V9938]] used in the MSX2, as well as the ‘TI Image Maker’ video expansion for the TI-99/4A home computer<ref>{{Cite web \|title=TI Image Maker – Gary O . P . A . \|url=https://garyopa.com/ti-image-maker/ \|access-date=2025-06-30 \|language=en-US}}</ref>. The main new features are three graphical [[YJK]]<ref>{{Cite web \|last=MSX Licensing Corporation \|date=2022 \|title=The YJK screen modes \|url=http://map.grauw.nl/articles/yjk/ \|website=MSX Assembly Page}}</ref><ref>{{Cite book \|last=Niemietz \|first=Ricardo Cancho \|url=http://rs.gr8bit.ru/Documentation/Issues-on-YJK-colour-model-implemented-in-Yamaha-V9958-VDP-chip.pdf \|title=Issues on YJK colour model implemented in Yamaha V9958 VDP chip \|year=2014}}</ref><ref>{{Cite web \|title=VCFe Vortrag vom 2016.04.30 - Homecomputer und Spielkonsolen - Videoarchitekturen als visuelles Medium \|url=http://neil.franklin.ch/Articles/20160430_VCFe_Video_als_Medium.html \|access-date=2022-11-13 \|website=neil.franklin.ch}}</ref> modes with up to 19268 colors and horizontal scrolling registers. The V9958 was not as widely adopted as the V9938.

	==Specifications==		==Specifications==

imported>Elmepi: x replaced by ×

2024-02-25T10:49:54Z

x replaced by ×

New page

{{More citations needed|date=February 2022}}
[[File:V9958 01.jpg|thumb|300px|Yamaha V9958]]
[[File:V9958 02.jpg|thumb|300px|Yamaha V9958 in ceramic package]]

The '''Yamaha V9958'''<ref>{{Cite book |url=https://books.google.com/books?id=8RwSAQAAMAAJ&dq=%22Yamaha+V9958%22+-wikipedia&pg=PA3984 |title=IC Master |date=2001 |publisher=United Technical Publications |language=en}}</ref><ref>{{Cite thesis |title=Arqueología informática: los ordenadores MSX en los inicios de la microinformática doméstica |url=https://riunet.upv.es/handle/10251/70909 |publisher=Universitat Politècnica de València |date=2016-10-03 |degree=Proyecto/Trabajo fin de carrera/grado |first=Sergio |last=Martín Sesma}}</ref><ref>{{Cite web |last=Redazione |date=2008-10-20 |title=MSX - Vari Costruttori- 1983 |url=https://www.cyberludus.com/2008/10/msx-vari-costruttori-1983/ |access-date=2022-11-13 |website=CyberLudus.com |language=it-IT}}</ref> is a [[Video Display Processor]] used in the [[MSX2+]]<ref>{{Cite journal |last=Alex |first=Wulms |date=1995 |title=Schermen op MSX - De 2+ schermen |url=http://www.msxarchive.nl/pub/msx/mirrors/hanso/hwdoityourself/msxplus.pdf |journal=MSX Computer & Club Magazine |issue=72}}</ref> and [[MSX turbo R]] series of home computers, as the successor to the [[Yamaha V9938]] used in the MSX2. The main new features are three graphical [[YJK]]<ref>{{Cite web |last=MSX Licensing Corporation |date=2022 |title=The YJK screen modes |url=http://map.grauw.nl/articles/yjk/ |website=MSX Assembly Page}}</ref><ref>{{Cite book |last=Niemietz |first=Ricardo Cancho |url=http://rs.gr8bit.ru/Documentation/Issues-on-YJK-colour-model-implemented-in-Yamaha-V9958-VDP-chip.pdf |title=Issues on YJK colour model implemented in Yamaha V9958 VDP chip |year=2014}}</ref><ref>{{Cite web |title=VCFe Vortrag vom 2016.04.30 - Homecomputer und Spielkonsolen - Videoarchitekturen als visuelles Medium |url=http://neil.franklin.ch/Articles/20160430_VCFe_Video_als_Medium.html |access-date=2022-11-13 |website=neil.franklin.ch}}</ref> modes with up to 19268 colors and horizontal scrolling registers. The V9958 was not as widely adopted as the V9938.

==Specifications==
* [[Video RAM]]: 128 KB + 64 KB of expanded VRAM
* Text modes: 80 × 24 and 32 × 24
* [[Display resolution|Resolution]]: 512 × 212 (4 or 16 colors out of 512) and 256 × 212 (16, 256, 12499 or 19268 colors)
* [[Sprite (computer graphics)|Sprites]]: 32, 16 colors, max 8 per horizontal line
* [[Hardware acceleration]] for copy, line, fill, etc.
* [[Interlaced video|Interlacing]] to double vertical resolution
* Horizontal and vertical scroll registers

===Feature changes from the V9938===
The following features were added to or removed from the [[Yamaha V9938]] specifications:

* Added horizontal scrolling registers
* Added [[YJK]] graphics modes (similar to [[YUV]]):
** G7 + YJK + YAE: 256 x 212, 12499 colors + 16 color palette
** G7 + YJK: 256 × 212, 19268 colors
* Added the ability to execute [[hardware acceleration|hardware accelerated]] commands in non-bitmap screen modes
* Removed [[lightpen]] and [[computer mouse|mouse]] functions
* Removed [[composite video]] output function

==MSX-specific terminology==
On MSX, the screen modes are often referred to by their assigned number in [[MSX BASIC]]. This mapping is as follows:

{| class="wikitable" width=50%
! 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
|}

==References==
{{reflist}}

[[Category:Graphics chips]]
[[Category:MSX hardware]]

Yamaha V9958 - Revision history

2607:FEA8:4500:E0:91A9:3BDC:C9C2:49E8 at 02:17, 30 June 2025

imported>Elmepi: x replaced by ×