Editing Intellivision (section)

===Intellivision III===
Also in 1981, Mattel Electronics executives indicated to APh, interest in a successor system for 1983. Although planned for some time, APh redirected staff efforts on the Intellivision III hardware around summer 1982.<ref name="B&S2024_309">{{cite book |last1=Boellstorff |first1=Tom |title=Intellivision: How a Videogame System Battled Atari and Almost Bankrupted Barbie |last2=Soderman |first2=Braxton |date=2024 |publisher=MIT Press |isbn=9780262380553 |pages=309, 312}}</ref> Based on a faster CP1610 for backward compatibility, APh developed an updated graphics STIC chip with 4x the resolution, more sprites, and more colors. Mattel Electronics programmers developing the EXEC software. When Mattel Electronics cancelled the project in mid-1983,<ref name="mitchell19830906">{{cite news | url=https://news.google.com/newspapers?id=gn0hAAAAIBAJ&sjid=tYoFAAAAIBAJ&pg=5584%2C3561802 | title=A summer-CES report | work=Boston Phoenix | date=September 6, 1983 | access-date=January 10, 2015 | author=Mitchell, Peter W. | page=4 | archive-date=November 17, 2015 | archive-url=https://web.archive.org/web/20151117044825/https://news.google.com/newspapers?id=gn0hAAAAIBAJ&sjid=tYoFAAAAIBAJ&pg=5584%2C3561802 | url-status=live }}</ref> Toshiba was laying out the new graphics chip, consoles expected to be in production by Christmas, cartridges to be ready by January 1984, according to Glenn Hightower of APh.<ref name="B&S2024_309" /> A Mattel document titled Target Specification Intellivision III has the following.<ref>{{cite web|title=Target Specification Intellivision III|url=http://papaintellivision.com/docIntv3.php|website=Papa Intellivision|access-date=2017-07-06|archive-date=2017-09-11|archive-url=https://web.archive.org/web/20170911024408/http://papaintellivision.com/docIntv3.php|url-status=live}}</ref>

*CPU:  CP1610-2 at 3.56&nbsp;MHz (2x original CPU speed)
** separate [[16-bit]] [[data bus]] and [[address bus]]
** [[multiplexed]] data/address mode for [[backward compatibility]] with existing cartridges
*Graphics:  STIC 1B
** tiled graphics, 20 cards by 24 rows
*** 2-color 16×8 pixel cards{{clarify|date=August 2022}} for a resolution of 320×192
*** 4-color 8×8 pixel cards for a resolution of 160×192
** 40 x 24 [[alphanumeric]]s
** 16 programmable colors
*** color palette selectable per card
*** 12-bit [[RGB]] definition for 4096 possible colors 
** 8 sprites per [[scanline]] 
*** reusable on different scanlines
*** 16 pixels wide in 1 color, 8 pixels wide in 3 colors
*** up-to 255 lines high
*** overlap detect of individual colors
** fine pixel horizontal and vertical scrolling (backward compatible)
** single data bus allows graphics ROM/RAM storage on cartridges
** STIC 1 backwards-compatible mode
* RAM:  4K [[computer word|words]], 16-bit, [[Dynamic random-access memory|DRAM]] (upgradable to 65K words)
* five channel sound with improved frequency range (backward-compatible)
* integrated Intellivoice