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Notes on w11 systems: w11a for Cmod A7-35

Basics

The sys_w11a_c7 system is a w11a implementation for the Digilent Cmod A7-35 board.

For complete configuration, see sys_conf.vhd. The most important features are:

Property Value
CPU options FPP: no; Cache: 16 kB
Memory 672 kB combined from 512 kB SRAM via c7_sram_memctl and 160 kB BRAMs via pdp11_bram_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 12 Mbps via FT2232HQ based serial link

Usage

The board has no LEDs and thus no console light emulation. The memory size of 672 kB allows starting only a subset of the available oskits. u5ed, u7ed, XXDP, RT11, RSX-11M and most most RSX-11M+ systems should work. 211bsd works only in the 'non-networking' configuration 211bsd_rpmin.

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

  ti_w11 -tuD,12M,break,xon  @<oskit-name>_boot.tcl

Status & History

The Cmod A7-35 board is one of the w11 development platforms. The sys_w11a_c7 design is regularly FPGA tested with ostest against the oskits running with 672 kB memory.

  • 2017-06-24: initial version.
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