Zet - The x86 (IA-32) open implementation :: Overview

Overview

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News

Description

The Zet SoC PC platform and processor is an open implementation of the so widely used x86 architecture. This project is being developed using four different FPGA boards: Xilinx ML-403, Altera DE0, Altera DE1 and Altera DE2-115 boards. Currently it's in a very early stage of development and only the 16 bit part is supported. The official website for the project is: zet.aluzina.org. Some features of the Zet SoC PC system include:

• 16 bit Zet processor equivalent to an Intel 80186, running at 25 Mhz (Wishbone compatible)
• Wishbone ZBT SRAM memory controller addressing 1 Mb of low memory
• Wishbone flash memory controller for BIOS storage (ROM BIOS and VIDEO BIOS)
• Video Graphics Adapter in text mode and 640x480,640x350,320x200 16 colors and 320x200 256 colors in chain 4 representation
• 8253 simple timer, sending interrupts each 18.2 Hz via IRQ 0
• 8042 keyboard controller sending PC/XT scancodes via IRQ 1
• UART support as COM1, using IRQ 4
• Very simple interrupt controller.
• Flash memory controller for floppy disk storage
• Compact Flash card controller for hard disk emulation with full read/write support
• SD card controller for hard disk emulation with full read/write support
• GPL implementation of a PC BIOS with several services implemented: interrupts 8h, 9h, 10h, 11h, 12h, 13h, 16h, 18h, 19h, 1Ah, 1Ch

• Main project page
• Some pictures of the system
• Discussion forums
• Installation guides for the Xilinx ML403 and Altera DE1
• Source code of the Zet system v1.2.0 (in tar.bz2 format)
• Source code of the Zet system v1.2.0 (in zip format)
• GIT development tree: git://github.com/marmolejo/zet.git

News

• 10-Nov-2010. Version 1.2.0 released!! A lot of new changes added. Two new FPGA boards now supported: Altera DE0 and Altera DE2-115. PS2 mouse support, new optimized BIOS with shadow RAM, new Zet opcodes added, system timer and speaker, new UART core and a lot of bug fixes!!
  
  1-Feb-2010. It's time to play games like Dune 2, Gods or Lemmings!! Three VGA graphical modes have been added: 640x350, 320x200 with 16 colors and 320x200 with 256 colors in chained four representation. Some other major improvements have been added: increased x8 SD card access speed, high performance memory controller, wishbone switch and asynchronous bridges added.
  
  
• 15-Sep-2009. Microsoft Windows 3.0 in graphics mode is running on Zet!! Also, preliminary support for SoundBlaster 16 (in direct mode) has been added. As a result, we are proud to announce major version 1.0.