[Oberon] Smallest Oberon board ever made?

Magnus Karlsson magnus at saanlima.com
Fri Jan 8 21:03:16 CET 2021

I have been playing around with a concept of an Oberon board smaller 
than RPI zero just for fun.
The board is 60 x 25mm in size and runs the Oberon disk image from 
projectOberon without modifications.
It has an 8 MB PSRAM chip so with software changes it supports an 8MB 
Oberon system.

FPGA: Artix 7-50
KB/Mouse via PS2
Video via microHDMI
Serial/Power via microUSB
8 status LED
4 DIP switches
reset/abort switch
nRF24 RF chip with uFL antenna connector
8 MB PSRAM chip (IPS6404) via 128kB cache
Video frame buffer in BRAM (mono)
microSD socket

As you can see in the images below the PS2 connectors are huge compared 
to the rest!


Booting: https://www.saanlima.com/images/Oberon_zero/IMG_5862.MOV

The novel thing about this board is the use of a small QSPI PSRAM as 
main memory.


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