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| 14:41.32 | leviathanch | focus_it: hi. we don't have a differential clock output for the RAM at the A31 |
| 14:41.35 | leviathanch | what should we do? |
| 14:42.02 | leviathanch | put an inverter gate at the output of the SoC clock output? doesn't seem elegant... |
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| 15:19.00 | focus_it | levianthanch: the S0CK and S0CKB seem to be the differential pair. Likewise S1CK S1CKB for the second slot. Cannot use inverter - if anything a single drive to differential line interface converter - but reasonably sure the two pairs given are differential (poor documentation - may be email Allwinner for clarification - just explain to them you are designing a board). |
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| 15:28.05 | penguin42 | ssvb: Ah fun with knowing how to optimisie routines not based just on a particular core name, but core versions - it's so hard! |
| 15:28.40 | ssvb | penguin42: :) |
| 15:29.53 | penguin42 | ssvb: I seem to remember that there are some configurable flags for prefetch on A8 as well and then it's just down to whether the firmware (or uboot??) set them |
| 15:30.38 | ssvb | for cortex-a8 the important configuration bit is L1NEON |
| 15:31.12 | ssvb | if it is set, NEON memory accesses go through L1 cache, which is blocking on cache misses |
| 15:31.46 | ssvb | if it is not set, then NEON can bypass L1 cache and stream data from/to L2 cache or memory |
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| 15:52.56 | OmegaPhil | http://tech.slashdot.org/story/12/12/04/1748232/toward-an-fsf-endorsable-embedded-processor <- Just read this, sounds awesome - has any of the funding materialised? |
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| 16:03.45 | penguin42 | hmm someone else claiming that an 8 core 800MHz thing can take on an i7 - sorry, I call bollocks |
| 16:04.17 | penguin42 | oh, it's that one again - old news |
| 16:04.30 | OmegaPhil | yeah, was just posted in the FSF channel |
| 16:04.54 | OmegaPhil | (an article on l.kcl's site that I then googled to get at that) |
| 16:05.12 | OmegaPhil | Called for $10million funding :) |
| 16:06.01 | buZz | sounds like another 'OMG MIPS IS AWESOME' project |
| 16:17.03 | ssvb | OmegaPhil: isn't this a news from 2012? |
| 16:20.18 | OmegaPhil | Yes |
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