Introduction
Prototypes, Rebuilds, and other new Amiga projects that just dont quite fit anywhere else on the web site will end up in here. if you know of any Amiga project that should be covered let me know.
A1200 Plus
- Original AGA chips are needed and can be put into the sockets. These include Lisa, Paula, Alice, Gayle and the two CIA chips.
- Budgie being a TQFP package is soldered directly to the board.
- The keyboard controller has been replaced by a modern 8 bit MCU.
- Keyboard used to switch bootselector, set stereo separation and switch ROM banks.
- Because there are different Chip Ram configurations possible, the Chip Ram is moved to a separate board. (e.g. 1Mx4, 256Kx16 or 512Kx8 DRAM chips)
- Video output has been moved to a separate 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 is located. This compact flash is connected to the IDE interface.
- The IDE interface is buffered using the otherwise unused Bus Buffer in Budgie.
- The power brick is replaced by an internal AC/DC power supply. This power supply is capable of:
- 5 Volts: main power rail 6 Amp capable
- 12 Volts: 1 Amp capable
- two PC standard 3 Pin fan headers are added to the board.
- An extra floppy power connector for powering ClockPort devices.
- An I2C controller has been added and there is a connector on board to connect I2C boards. (e.g. Real Time Clock modules)
- The I2C bus is also used to drive a DigiPot that is in the audio path, this is used to set the stereo separation of the Amiga Audio signals.
- Extension board connector for mouse/joystick/Network/Flash Floppy/Boot selector.
The old A1200 Classic motherboards are not going to last for ever and so there is a lot of projects and efforts to remake the motherboards for old and new users. At the same time of re-building these systems, why not improve on the design a little more, like have internal PSU unit, compact flash card built in (Personally hopefully HDMI and USB support as well) but to keep the design as close to the original. A1200 Plus looks to be a very interesting and exciting project i will be keeping a close eye on.
http://www.amigaclub.be/projects/amiga1200plus - Official site