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The Apple IIGS (styled as II GS) is a 16-bit personal computer produced by Apple Computer beginning in September 1986. It is the fifth and most powerful model of the Apple II family. The "GS" in the name stands for "Graphics and Sound", referring to its enhanced multimedia hardware, especially the state-of-the-art audio. [ 1 ]
The 65C816 is the CPU for the Apple IIGS and, in modified form, the Super Nintendo Entertainment System. The 65 in the part's designation comes from its 65C02 compatibility mode, and the 816 signifies that the MPU has selectable 8- and 16-bit register sizes.
Platform: Apple IIGS; Form Factor: 50-pin slot card; Speed: 7—15 MHz; Cache: 16, 32, or 64 KB (8, 16, or 32 KB data, 8, 16, or 32 KB tag) DMA compatible: Yes; Upgradeable: Yes; The accelerator consists of the CPU WDC 65C816 running at most at 15 MHz. A cache divided into 32 KB "data" and 32 KB "tag". The result is an average 4x performance ...
Essentially a miniaturized Apple IIe computer on a card (using the Mega II chip from the Apple IIGS), it allowed the Macintosh to run 8-bit Apple IIe software through hardware emulation, with an option to run at roughly double the speed of the original IIe (about 1.8 MHz). However, the video output was emulated in software, and, depending on ...
It is based on the 8/16-bit WDC 65C816, which was developed between 1982 and 1984 for the Apple IIGS personal computer. It has 92 instructions, an 8-bit data bus, a 16-bit accumulator, and a 24-bit address bus. The CPU runs between 1.79 MHz and 3.58 MHz, and uses an extended MOS Technology 6502 instruction set.
The Apple IIe (styled as Apple //e) is the third model in the Apple II series of personal computers produced by Apple Computer. It was released in January 1983 as the successor to the Apple II Plus. The e in the name stands for enhanced. It is the first Apple II with built-in lowercase and 80-column text support, as well as 64K RAM, while ...
The Mega II contained the functional equivalent of an entire Apple IIe computer (sans processor), which, combined with the 65C02 emulation mode of the 65C816 processor, plus ROM and RAM, provided full support for legacy (8-bit) Apple II software in the Apple IIGS.
GS/OS is an operating system developed by Apple Computer for its Apple IIGS personal computer. It provides facilities for accessing the file system, controlling input/output devices, loading and running program files, and a system allowing programs to handle interrupts and signals. It uses ProDOS as its primary filing system.