The sys_w11a_n4d system is a w11a implementation for the Digilent Nexys A7-100 board with DDR2 SDRAM support via a Vivado MIG core. The design is also compatible with the Nexys 4 DDR board. For complete configuration, see sys_conf.vhd. The most important features are:
| Property | Value |
|---|---|
| CPU options | FPP: no; Cache: 32 kB |
| Memory | 3840 kB from DDR2 SDRAM via miglib_nexys4d |
| Devices | DL11:2; DZ11, PC11, LP11, DEUNA, RK11, RL11, RHRP, TM11, IIST, KW11P, M9312: yes |
| Diagnostics | rbmon: yes; ibmon: yes; dmpcnt: yes; dmhbpt: 2; dmcmon: yes |
| Rlink | 12 Mbps via FT2232HQ based serial link |
An alternative design that uses only BRAM is available as sys_w11a_br_n4d.
The board has 16 LEDs and allows a nice console light emulation. The memory size of 3840 kB allows starting all oskits.
For complete instructions on how to run operating system images, see w11a_os_guide. The default setup is:
SWI = 00000000 00101000 (gives console light display on LEDs)
ti_w11 -tuD,12M,break,cts @<oskit-name>_boot.tcl
The Nexys A7-100 board is one of the main w11 development platforms. The sys_w11a_n4d design is often FPGA tested with ostest against all oskits.
- 2019-08-10: procured Nexys A7-100 board. BUGFIX in MIG configuration. Now fully FPGA tested and verified.
- 2019-01-02: initial version, only simulation tested (no board available for FPGA testing)