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Acorn A5000 emulation

 The A5000 was launched in September 1991. Naturally there was a Learning Curve package for eduction to go with it. A year later the A5000 was boosted with additional models (including discless Econet and Ethernet terminals) and bigger hard discs.

 In July 1993 Acorn finally released the FPA10 Floating Point Accelerator for the A540, A5000 and R260 which boosted floating point performance by a factor of 50. The Acorn A5000 and A540 FPA upgrade kit installation instructions provides more information about installation and use of the FPA10. The FPA Support disc is available in the Software section.

In September 1993 a improved A5000 (alpha version) was launched with a faster 33MHz ARM3 and the capability to expand memory beyond 4MB.

The A5000 included a number of significant changes from the previous Acorn computers. The A5000 had:

  • a PC standard 15 pin VGA monitor connection, instead of the 9 pin RGB connection used on the Archimedes and A3000 ranges. This meant that any PC monitor could easily be used with the A5000.

  • a PC standard serial connection instead of the RS423 connection used on earlier models.

  • a bi-directional parallel port.

  • a floppy drive that supported 3.5" HD discs with a new Acorn 1.6MB (F format) floppy to go with it. PC compatability was also extended to support the MSDOS 1.44MB floppy.

  • an on-board IDE controller replaced the aging ST506 (MFM) controller.

The A5000 was the first Acorn computer to come with RISC OS3 installed. This was a major improvement on RISC OS 2 and the ROM size increase from 512KB (for RISC OS 2) to 2MB (for RISC OS 3). The first A5000 models (ALB10, ALB12, ALB14) were launched with RISC OS 3.00 but it had a serious bug in the ADFSBuffers code which caused disc corruption. if you are running RISC OS 3.00 you must set ADFSBuffers to 0 to avoid this fault. Acorn produced an bug fixed version RISC OS 3.10 which was used in subsequent A5000s. RISC OS3.10 was replaced with RISC OS 3.11 and became the standard RISC OS 3 version.


Apple II GS emulation

 Released on Apple's 10th anniversary, the first 10,000 Apple IIGS computers (GS = graphics + sound) have the signature of "Woz" on the front. Woz is Steve Wozniak, who single-handedly designed the first Apple computers, the Apple I and the Apple II.

 The IIGS is a continuation of the earlier Apple II computer line, and is designed to be backwards compatible with Apple II software and hardware. The IIGS CPU even has built-in MOS 6502 emulation, which is the CPU in the Apple II line of computers.

 The IIGS was the first Apple computer system to utilize the Apple Desktop Bus (ADB). The ABD is a low-speed bi-directional serial bus that connects input devices, such as keyboards, mouse devices, and graphics tablets to the IIGS. It was later incorporated into the Macintosh line of computers, from the Macintosh II and up. ADB was eventually phased-out in favor of the more standardized USB (Universal Serial Bus) in the late 90's.

 As the Apple with the best color graphics, the IIGS also has the best sound. It utilizes an Ensoniq sound chip, which has an entire 64K of RAM dedicated to it and is capable of playing 15 simultaneous sounds.

 The IIGS has a GUI (graphic user interface) in 16 colors (up to 4096 colors in special graphics modes), a slow but powerful 16 bit CPU, great sound, and was loved by Apple fans everywhere. Sounds like a success - but by this time Apple was spending all its time and effort marketing the Macintosh line of computers, and the IIGS died a slow and uneventful death.  




PC-AT emulation

The IBM Personal Computer/AT (model 5170, abbreviated as IBM AT or PC/AT) was released in 1984 as the fourth model in the IBM Personal Computer line, following the IBM PC/XT and its IBM Portable PC variant. It was designed around the Intel 80286microprocessor.



Atari 8-bit emulator

The Atari 8-bit family is a series of 8-bit_home computers introduced by Atari, Inc. in 1979 as the Atari 400 and Atari 800[2] and manufactured until 1992. All of the machines in the family are technically similar and differ primarily in packaging. They are based on the MOS Technology 6502CPU running at 1.79 MHz,[a] and were the first home computers designed with custom coprocessor chips. This architecture enabled graphics and sound more advanced than contemporary machines, and gaming was a major draw. First-person space combat simulator Star Raiders is considered the platform's killer app. The systems launched with plug-and-play peripherals using the Atari SIOserial bus, an early analog of USB.

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