The sys_w11a_n4 system is a w11a implementation for the Digilent Nexys 4 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 PSRAM via nx_cram_memctl_as |
| 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 |
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 4 board was the main w11 development platforms until it failed in July 2019. Until July 2019 the sys_w11a_n4 design was often FPGA tested with ostest against all oskits. Since July 2019 this design is only simulation tested.
- 2019-07-20: board failed, from now on the design only simulation tested
- 2013-09-22: initial version