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amiga1200-plus's Introduction

Scheme

Amiga 1200+

About

This project is a re-implementation of the Amiga 1200 board started from the schematics. I made some changes and enhancements to the original schematics.

Features

  • All Original AA chips are needed and can be put into the sockets. These include Lisa, Paula, Alice and the two CIA chips.
  • The CPU is removed, you need some accellerator board to run this board.
  • The DRAM has been removed and the functionality has been moved to a daughterboard.
  • Video output has been moved to a seperate output board. This board get all Lisa output signals and also all the typical Zorro signals. This means that an RTG card can be developed.
  • The PCMCIA slot has been removed and in the free space a Compact Flash socket has been added.
  • A 110V-240V AC-DC powersupply has been added, so no more power brick. This generates these voltages:
    • 5 Volts: main power rail 5 Amp capable
    • 12 Volts: 0.8 Amp capable
  • two PC standard 3 Pin fan headers are added to the board.
  • A non-volatile digipot has been added in the audio path, this allows you to set the stereo separation.
  • Extension board connector for Mouse/Joystick/Network/FlashFloppy. (one is in development that has USB Mouse and two classic DB-9 connectors and autoswitches when fire button is pressed + ethernet)
  • Replaced the keyboard controller by a modern MCU
  • Dual ROM switcher
  • DF0/DF1 Bootselector

License

Scheme

This project is licensed by a Creative Commons license; You are welcome (and encouraged!) to extend, re-spin and otherwise use and modify the design as allowed by the license. - see Creative Commons for details

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