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wfjm / w11

PDP-11/70 CPU core and SoC
https://wfjm.github.io/home/w11/
GNU General Public License v3.0
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Help wanted: Testing with Arty S7 appreciated #17

Closed wfjm closed 2 years ago

wfjm commented 5 years ago

The w11a design for Arty S7 (50 die size), see rtl/sys_gen/w11a/artys7, was provided to support also an up-to-date Spartan-7 based board. Turned out that speed is equivalent to Artix-7. It is so far only simulation tested.

Testing done with a real Arty S7, would be highly appreciated. Please double check the pin assignments (see _miga.prj and artys7*.xdc) with the documentation of your board to avoid potential damage.

Looking forward to receive test reports.

wfjm commented 5 years ago

I made the w11a design for Arty S7 out of curiosity, just to see the performance difference between Artix-7 and Spartan-7. It turned out that there is none, at least for this design.

Given that I have an Arty A7 and a Nexys A7 board (for full portfolio see blog) it makes little sense for me to add an Arty S7. Same price as an Arty A7, slightly larger die size (50 instead of 30), but no Ethernet.

In case I invest in Spartan-7 in the future, I'd likely go for a Trenz TE0890-01-25-1C or Trenz TE0725-03-35 based solution.

However, if someone owns an Arty S7 or has access to one, I'd very much appreciate to receive test reports.

wfjm commented 2 years ago

Apparently nobody invested into an Arty S7.
The sys_w11a_as7 will be marked untested, removed from the default build and test flows, but kept in the repository.