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Notes on w11 systems: w11a for and S3BOARD


The sys_w11a_s3 system is a w11a implementation for the Digilent S3BOARD board. For complete configuration, see sys_conf.vhd. The most important features are:

Property Value
CPU options FPP: no; Cache: 8 kB
Memory 1024 kB from SRAM via s3_sram_memctl
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 460 kbps via USB-RS232 cable connected to the RS232 port


The board has 8 LEDs and offers only a compactified console light emulation. The memory size of 1024 kB allows starting all oskits.

For complete instructions on how to run operating system images, see w11a_os_guide. The default setup is:

  SWI = 00101010
  ti_w11 -tu<dn>,460k,break,xon @<oskit-name>_boot.tcl

Status & History

The S3BOARD was the first w11 development platform. All inital w11 developments were done with this board. In 2011, the developemt switched to the Nexys 2 board, as this board offered full 4 MB memory, and more importantly, a high speed rlink connection. The S3BOARD is still available, but is no longer actively used. The design is retained for historical and nostalgic reasons.

  • 2007-09-23: initial version