Phoenix Nexus FPGA board

[Badwolf]

A naming thread I missed?!

I'm yet to think of a name for the new MMU..

Justified Ancients of MMU MMU, of course.



BW

[exxos]

Justified Ancients of MMU MMU, of course.

Now I need to go find my KLF album!

EDIT:

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[exxos]

A lot of stuff got changed around.. Still got some stuff to reroute and change yet. But probably 95% done now

Good going to route such a huge FPGA on basically 2 layers overall. 2 layers are used for power. All 100% manual routing as always

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[exxos]

The story so far...

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Who can spot the first slight oops

I need to remove those sockets on a H5 at some point and fit headers for the new FPGA board to fit in place.

[JezC]

How much clearance is there under the PSU?

I don't have a Falcon RAM board to replace, so not worrying about that...

[exxos]

How much clearance is there under the PSU?

Generally there is only enough room for a socket and a IC such as the ROM.

With header sockets and the FPGA board, it won't fit under the PSU. But is not really important at this point, because it simply needs to be replaceable for development purposes..

Ultimately if the FPGA board is soldered directly into the motherboard with low profile headers,then it should theoretically fit underneath the power supply.. At least that's the intention!

I don't have a Falcon RAM board to replace, so not worrying about that...

The Falcon RAM board cannot be used but is not really important (or the simm) as the whole RAM gets replaced with SDRAM on the FPGA board anyway with a 16MB SDRAM !

[Icky]

How much clearance is there under the PSU?

Generally there is only enough room for a socket and a IC such as the ROM.

With header sockets and the FPGA board, it won't fit under the PSU. But is not really important at this point, because it simply needs to be replaceable for development purposes..

Ultimately if the FPGA board is soldered directly into the motherboard with low profile headers,then it should theoretically fit underneath the power supply.. At least that's the intention!

I used low profile headers with the first version of FPGA blitter board on my dev H5 board along with turned socket pin strips. The PSU will fit as can be seen in the photo of my dev board, the board at the back, is actually flush with the PLCC socket only the chip is raised but with plenty of clearance for the PSU frame.

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Low profile headers:
https://www.toby.co.uk/board-to-board-p ... ed-header/

[exxos]

@Icky thanks but I'd probably use the square pins for Dev boards as its what ijors board uses.

[Icky]

@Icky thanks but I'd probably use the square pins for Dev boards as its what ijors board uses.

Agreed for dev purposes the square ones are good. For final boards those pins are good