[Oberon] Smallest Oberon board ever made?

[Pablo Cayuela]

Oh!, it's really amazing the level of integration, and even the micro
connectors appear big against the chips.
If BRAM is for monochrome video memory, how much is it?
The 128 kB caché is part of the 8 MB PSRAM chip (IPS6404) or where it
resides?
The IPS6404, is it acquirable? How much is the cost? I read on the IPUS
site "for limited customers only", maybe you're one of them.

Congratulations Magnus for such a wonderful board.

Best regards,
Prof Pablo Cayuela
Argentina



On Fri, Jan 8, 2021 at 5:04 PM Magnus Karlsson <magnus at saanlima.com> wrote:

> 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!
>
> https://www.saanlima.com/images/Oberon_zero/OZ3.jpg
> https://www.saanlima.com/images/Oberon_zero/OZ1s.jpg
> https://www.saanlima.com/images/Oberon_zero/OZ2s.jpg
>
> 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.
>
> Cheers,
> Magnus
>
> --
> Oberon at lists.inf.ethz.ch mailing list for ETH Oberon and related systems
> https://lists.inf.ethz.ch/mailman/listinfo/oberon
>
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