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==Emulators==
{{Apple}}[[Category:Computers]]
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{{DISPLAYTITLE:Apple II<span style="font-size:75%">GS</span> emulators}}
{{Infobox console
|title=Apple II<span style="font-size:75%">GS</span>|image=AppleIIGSPC.png|imagecaption=An Apple II<span style="font-size:75%">GS</span> PC.|developer=[[Apple Inc.|Apple Computer, Inc.]]|type=[[:Category:Computers|Computers]]|release=September 1986|discontinued=December 1992|predecessor = [[Apple II Lineline|Apple II]]|emulated={{✓}}
}}
The '''[[Apple II Lineline|Apple II]]<span style="font-size:75%">GS</span> ''' is a 16-bit PC produced by Apple Computer , Inc. It was created to compete with the [[Amiga Lineline|Amiga]] and the [[Atari ST Lineline|Atari ST]] lines of PCs.
Despite the Apple II<span style="font-size:75%">GS</span> name, it is a completely different architecture. The system has a chip called the “Mega II” which is an [[Apple II Lineline|Apple //e]] on a chip, making it fully backwards compatible with Apple ][ software.
It was the first machine from Apple to use the Apple Desktop Bus and the first to provide a colour version of QuickDraw since the first colour Macintosh was not available until 1987. However it does not provide a high-resolution square pixel mode.
==Emulators==
{| class="wikitable" style="text-align:center"
! scope="col"|Name
! scope="col"|Platform(s)
! scope="col"|Latest version
! scope="col"|<abbr title="Free/Libre and Open-Source Software">FLOSS</abbr>
! scope="col"|Active
! scope="col"|[[Recommended Emulators|Recommended]]
|-
! colspan="7"|PC / x86
|-
| [[KEGS]]
| align=left|{{Icon|Linux|macOS}}
| [http://kegs.sourceforge.net/ {{KEGSVer}}]
| {{✓}}
| {{✓}}
| {{✓}}
|-
| [[GSplus]]
| align=left|{{Icon|Windows|Linux|macOS}}
| [https://github.com/digarok/gsplus/releases {{GSplusVer}}]
| {{✓}}
| {{✗}}
| {{~}}
|-
| [https://david-schmidt.github.io/gsport GSport]
| align=left|{{Icon|Windows|Linux|macOS}}
| [https://github.com/david-schmidt/gsport/releases {{GSportVer}}]
| {{✓}}
| {{✗}}
| {{✗}}
|-
| [[MAME]]
| align=left|{{Icon|Windows|Linux|macOS|FreeBSD}}
| [http://www.mamedev.org/release.html {{MAMEVer}}]
| {{✓}}
| {{✓}}
| {{✗}}
|}
==Processor==
The central processor is a 65816, a backwards-compatible 16-bit update to the 6502 that was also used in the Super Nintendo. It runs natively at 2.8Mhz but will slow down to ~1Mhz when in classic Apple II emulation mode or when writing to video memory.
==Graphics Capabilities==
In addition to RGB emulations of the existing Apple II artefact composite video modes, the IIgs adds 320x200 and 640x200 RGB colour modes; the former in various combinations of 16 colours per line and the latter at 4 colours per line (including a hardware dithering mode that acts a little like 16 colours per line). Each line may use any of 16 palettes, making a total of 256 colours on screen without raster-linked palette changes.
==Audio Capabilities==
The IIGS provides a 32-channel wavetable Ensoniq sound chip, which uses 64kb for samples.
The OS by default configures this as 15 stereo channels and uses the remaining two channels as interrupt counters; the IIGS is therefore often described as a 15-channel machine.
{|class="wikitable" style="text-align:center"!scope="col"|Name!scope="col"|Operating system(s)!scope="col"|Latest version!scope="col"|Active!scope="col"|[[Recommended Emulators|Recommended]]|-|[[KEGS]]|Multi-platform|0.91|{{✗}}|{{✓}}|-|[[GSplus]]|Multi-platform|0.14|{{✓}}|{{~}}|-|[[GSport]]|Multi-platform|0.31|{{✗}}|{{✗}}|-|[[MAME]]|Multi-platform|{{MAMEVer}}|{{✓}}|{{✗}Apple}|}
