<div dir="ltr"><div>Oh!, it's really amazing the level of integration, and even the micro connectors appear big against the chips.</div><div>If BRAM is for monochrome video memory, how much is it?</div><div>The 128 kB caché is part of the
8 MB PSRAM chip (IPS6404) or where it resides? <br></div><div>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.</div><div><br></div><div>Congratulations Magnus for such a wonderful board.</div><div><br></div><div>Best regards,</div><div>Prof Pablo Cayuela</div><div>Argentina</div><div><br></div><div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Jan 8, 2021 at 5:04 PM Magnus Karlsson <<a href="mailto:magnus@saanlima.com" target="_blank">magnus@saanlima.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">I have been playing around with a concept of an Oberon board smaller <br>
than RPI zero just for fun.<br>
The board is 60 x 25mm in size and runs the Oberon disk image from <br>
projectOberon without modifications.<br>
It has an 8 MB PSRAM chip so with software changes it supports an 8MB <br>
Oberon system.<br>
<br>
FPGA: Artix 7-50<br>
KB/Mouse via PS2<br>
Video via microHDMI<br>
Serial/Power via microUSB<br>
8 status LED<br>
4 DIP switches<br>
reset/abort switch<br>
nRF24 RF chip with uFL antenna connector<br>
8 MB PSRAM chip (IPS6404) via 128kB cache<br>
Video frame buffer in BRAM (mono)<br>
microSD socket<br>
<br>
As you can see in the images below the PS2 connectors are huge compared <br>
to the rest!<br>
<br>
<a href="https://www.saanlima.com/images/Oberon_zero/OZ3.jpg" rel="noreferrer" target="_blank">https://www.saanlima.com/images/Oberon_zero/OZ3.jpg</a><br>
<a href="https://www.saanlima.com/images/Oberon_zero/OZ1s.jpg" rel="noreferrer" target="_blank">https://www.saanlima.com/images/Oberon_zero/OZ1s.jpg</a><br>
<a href="https://www.saanlima.com/images/Oberon_zero/OZ2s.jpg" rel="noreferrer" target="_blank">https://www.saanlima.com/images/Oberon_zero/OZ2s.jpg</a><br>
<br>
Booting: <a href="https://www.saanlima.com/images/Oberon_zero/IMG_5862.MOV" rel="noreferrer" target="_blank">https://www.saanlima.com/images/Oberon_zero/IMG_5862.MOV</a><br>
<br>
The novel thing about this board is the use of a small QSPI PSRAM as <br>
main memory.<br>
<br>
Cheers,<br>
Magnus<br>
<br>
--<br>
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<a href="https://lists.inf.ethz.ch/mailman/listinfo/oberon" rel="noreferrer" target="_blank">https://lists.inf.ethz.ch/mailman/listinfo/oberon</a><br>
</blockquote></div>