exxos blog - random goings on

[exxos]

These FPU's have a high failure rate like 50% of them

Meanwhile.. just soldered this up...

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[DoG]

These FPU's have a high failure rate like 50% of them

What is FMUL:Brand?

[exxos]

What is FMUL:Brand?

No idea, I didn't write that app.

[DoG]

No idea, I didn't write that app.

I know. I thought it said something in the read me but I had a read myself and it was very sparse. Maybe "Function Multiply", but "Brand" I have no idea?

[exxos]

I know. I thought it said something in the read me but I had a read myself and it was very sparse. Maybe "Function Multiply", but "Brand" I have no idea?

"BRAND" comes up loads of times, I don't know what it means. https://www.exxosforum.co.uk/forum/viewt ... 00&p=19330

[czietz]

RTFM certainly helps.

Quoting the README:

Three large random tables are used. One provides unit double precision values in
the range (-1.0 -> +1.0), another raises unit random values to 2^+/-N where N is
a random in the range (-128 -> +127), another uses pure random binary data which
may include denormalised or NaN values. These tables are used as source data for
many of the tests.

More precisely: brand = binary data. drand = unit random values. erand = exponentiated random values. The test in question ("FMUL") multiplies the values from these random tables and checks the results.

[DoG]

Thanks for clarification.

[exxos]

Can't see anything wrong with the new RAM card unless all the RAM is faulty. Though it seems more like a RAS/CAS fault as it progressively gets worse.

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[exxos]

Right so A9 needs to be connected

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[PhilC]

You'd have been surprised and disappointed if it didn't need a bodge wire.