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KEGS is emulator of the Apple IIGS computers, running on many different platforms, including Amiga. The Apple IIGS is a 16 bit computer produced by Apple as a successor to the legendary 8 bit Apple II computers. Unique feature of this computer is that while being 16 bit machine by design, it is backward compatible and runs without problem almost all the software of the 8 bit Apple computers with no additional effort. This backward compatibility meant that the computer already have more than 5000 software titles available for it at the day of its release unlike the Atari ST and Amiga which were released around one year earlier than the IIGS release date. The Apple IIGS was released at September 15th, 1986. 8 bit software titles worked fine, and later native 16 bit games and utilities were developed taking full advantage of the raw power of the machine capable of many colours, enjoyable sound and faster speeds. The Central Processor Unit (CPU) utilized was 65C816 which was used before for Apple II accelerator boards, so it was not new technology for the Apple II enthusiasts. Thanks to the built-in 8 bit mode in the processor, the old software ran without the need of patches. This was a nice plus of the Apple II users in comparassion with the Atari XL and Commodore C64/C128 users which would hardly migrate to the Atari ST or the Amiga, taking into account they had to start their software collection from the beginning for the new machine. It was natural for the users to migrate to the IIGS from the earlier Apple II models which were first released at 1977 and began to age in 1986. All the software titles collected during these 9 years were still in use and all the extra features which were available only through expensive expansion boards on the 8 bit machines were already present on the Apple IIGS. For example 80 column text modes and double lowres and highres modes (not present in the original Apple II, but available with expansion cards). Synthesizer sound was a huge selling point - only simple 1 bit beeper was provided with the 8 bit Apples and better sound available only as a separate expansion card on the Apple II. More Memory easily accessible by the new 16 bit processor. Apple II models with more than 64KB memory were available, but the extra memory was accessed through bank switching. More colors - the original Apple IIs had only 16 colors, while the IIGS (standing for II Graphics Sound) had a palette of 4096 colors with up to 3200 colors on screen with the use of software tricks. The most notable feature from software point of view was the new mouse driven GUI (shown on the picture) which was very similar to the one used in the Apple Macintosh computers only in color at the period when the Mac computers were still black and white.
The KEGS emulator is utterly compatible with almost all Apple IIGS software released, with proper emulation of the CPU, graphic, sound and controllers. Original ROM image is not included in the archive for copyright reasons, but is easy to obtain. The emulated Apple IIGS can work with disk images of 5.25 or 3.5 inch disks or hard drive images which are easy to use.
Another nice feature of the Apple computers is the Analog 2 button Joystick which provides better gameplay and easier control of the games. The Joystick input is selectable from Mouse (for analog simulation), AmigaInput (also possible to use analog controller) and lowlevel.library digital joystick, the standard Amiga joystick used in the classic Amiga computers.
The emulator can be ran on own screen or in Workbench window with or without status line at selectable speeds: 1.024 MHz (Speed of the original Apple II 8 bit computers), 2.8 MHz - Normal speed of the brand new Apple IIGS, 8.0 MHz (Speed of the Zip Accelerator) and
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