System09

Description

6809 System On a Chip that emulates the SWTPc 6809. It has been ported to a variety of FPGA boards including the XESS XSA-3S1000, BurchED B5-X300 and Digilent Spartan 3 Starter board. The System09 project page with revision history can be found at http://members.optusnet.com.au/jekent/system09 . System09 runs the Flex9 disk operating system for the 6809 which can be found at the Flex Users Group . The Flex disk operating system and most of the associated software has been placed in the public domain. The source code for Flex9 can be found in the CVS repository. I have included ROMs for the NOICE debugger for the 6309/6809.

Features

- 6809 instruction compatible
- 6850 compatible ACIA/UART (57.6 KBaud)
- Hardware Trap Logic
- Dual 8 bit I/O port
- Simple timer
- 80 x 25 character Video Display with colour attributes
- Compact Flash interface
- PS/2 Keyboard Interface
- SYS09BUG Monitor ROM with Video driver
- Dynamic Address Translation supports up to 1Mbyte of RAM
- Fits in 300KGate Spartan IIe
- Uses Xilinx Block RAM for monitor ROM and VDU memory.
- Optional NOICE ROMs

Status

• Skeleton implementation on Digilent Zybo Z7-20 board (56k in BRAM, SBug ROM and serial console over Pmod RS232) using ISE 14.7.
• Skeleton implementation on Digilent Atlys Spartan6 board (56k in BRAM, SBug ROM and serial console over usb2uart) using ISE 14.7.
• Implemented on XESS XuLA-200 using ISE 12.4.
• Implemented on Terasic DE1 board using Altera Quartus II.
• Implemented on XESS XSA-3S1000 + XST-3.0 running Flex9 from IDE drive / CF card
• Implemented on Digilent XC3S200 Starter Board with RAM disk
• Implemented on BurchED B5-X300 FPGA Board running Flex9 from CF.
• Limited Implementation on Digilent XC3S500E starter board using Block RAM.
• Runs the SYS09BUG Monitor ROM with Video Display drivers.
• Runs the Flex9 Disk operating system from RAM Disk, IDE Drive or Compact Flash
• Also run NOICE Monitor for the 6809
• Implemented with WebPack ISE 7.1i for upward compatibility.