Not just that, we must carefully customize the device tree to correctly map all peripherals available on the motherboard. We are trying to re-patch a recent version of U-Boot, quite some time has passed since we patched it to make it recognizing the graphic board we mounted on the PCIe port on the NXP T2080RDB board.
#Xbench for powerpc code#
After that, we plan to place the first code in the CPLD, and right after that we should be ready to load U-Boot, the first-stage and second-stage bootloader. If all checks continues like this, we might end all electronic debugging in the next few weeks and we can consider this very delicate phase successfully completed. So far so good, the electronic design seems to work correctly, at the moment we are only fine-tuning each electronic component. The visible biggest gray chip is the CPU NXP T2080 Power Architecture CPU. The Complex Programmable Logic Device (CPLD) is a Lattice LCMXO640C-3TN100C FPGA and has to be programmed to manage all those external peripherals connected to it ( see the block diagram and wiring diagram on page 15 ), manage interrupts, data, boot reads, set resources according to the CPU and reset all peripherals. The Eclipse Legacy Battery was tested and is recharging properly. The other power supplies are a half a dozen voltage regulators and are meant to power elements such as the PCIe, the RAM, the internal peripheral buses, the connected devices, the Non-Volatile Memory Express (NVMe) and the clock generators the are essential to make the board work properly. ramps, voltage thresholds, internal ways of making the PWM regulator work, and so on). The start-up ramp needs to be carefully calibrated, a complex integrated circuit with a some logic that needs to be programmed to make it work properly (i.e.
The chip in charge to power up the CPU NXP T2080 is the Texas Instruments TPS544B20RVFT (Switching Voltage Regulators 4.5-18V 20A SWIFT) as explained at page 37 in our electrical schematics. We tested the primary power supply stage of the CPU, one the most power hungry components in the board, and it is being fine-tuned thanks to a programming apparatus. The laptop prototypes testing is progressing great. This subreddit is not endorsed or sponsored by Apple Inc.Picture by PublicDomainPictures from Pixabay If you'd like to view their content together, click here. This fundamental difference in audience is why we support two communities, r/Apple and r/AppleHelp. Apple SubredditsĬontent which benefits the community (news, rumors, and discussions) is valued over content which benefits only the individual (technical questions, help buying/selling, rants, etc.).
#Xbench for powerpc upgrade#
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