Apple IIGS
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Apple IIGS

The Apple IIGS (styled as IIGS), the fifth and most powerful of the Apple II family, is a 16-bit personal computer produced by Apple Computer, Inc. While featuring the Macintosh look and feel, and resolution and color similar to the Commodore Amiga and Atari ST, it remains compatible with earlier Apple II models. The “GS” in the name stands for “Graphics and Sound,” referring to its enhanced multimedia hardware, especially its state-of-the-art audio.

The microcomputer is a radical departure from any previous Apple II, with its 16-bit 65C816 microprocessor, direct access to megabytes of random-access memory (RAM), and mouse. It was the first computer produced by Apple to use a color graphical user interface (color was introduced on the Macintosh II six months later) and Apple Desktop Bus (ADB) interface for keyboards, mice, and other input devices. It is the first personal computer to have a wavetable synthesis chip, utilizing technology from Ensoniq.

The IIGS set forth a promising future and evolutionary advancement of the Apple II line, but Apple increasingly focused on the Macintosh platform. The IIGS clock speed was intentionally limited below the maximum for the 65C816 so the system would not outperform the Macintosh. The IIGS outsold all other Apple products, including the Macintosh, during its first year in production. Apple ceased IIGS production in December 1992.

History of Apple IIGS is provided by wikipedia

Apple IIGS – General Information

IntroducedSeptember 1986
DiscontinuedDecember 1992
Order NumberA0012LL/A
Weight8.72 Ibs.
3.955 KG
Dimensions4.6” H x 11.2” W x 13.7” D
11.69 cm H x 28.45 cm W x 34.80 cm D
ProcessorWDC 65C816
Processor Speed2.8 MHz
Number of Cores1
System Bus1 MHz
Built-in Memory256 KB (Revision 1-2)
1.125 MB (Revision 3)
Maximum Memory8.125 MB
Memory Slots1 – 44-pin Memory Expansion Card
Minimum SpeedUnknown
ROM128 KB (Revision 1-2)
256 KB (Revision 3)
Graphics CardCustom Video Graphics Controller (VGC)
Graphics MemoryUnknown
Display Connection1 – RCA for composite video output,
1 – DB-15
External Resolution320 × 200 (16 colors per line, 256 colors per screen)
640 × 200 (4 or more colors per line, 128 colors per screen)
560 × 192 (16 colors)
80 × 48 (6 colors)
280 x 192 (6 colors)
40 × 48 (16 colors)
Original OSApple ProDOS 16 or GS/OS
FirmwareApplesoft BASIC
Serial2 – RS-422
1 – DE-9
Floppy Port1 – DB-19
Game1 – internal 16-pin GAME I/O
1 – external DE-9
Audio InNone
Audio Out1 – 3.5-mm analog output jack
1 – Built-in speaker
Display1 – RCA for composite video output
1 – DB-15
Expansion Slots7 – 50-pin Apple II peripheral
MediaOptional Apple 3.5, Apple 5.25, or UniDisk floppy disk drive
Backup Battery3.6 V lithium
Maximum Continuous Power60 W
Line Voltage107 – 132V AC
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Source: Wikipedia, Wikimedia, Apple

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