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openbmc-conversion.md

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Converting to OpenBMC from AMI firmware

Often a number of steps are required to convert from the AMI firmware to OpenBMC. These steps are documented for various machines below.

Palmetto

  1. Upgrade the firmware flash chip to 256Mb (32MB) part (MX25L25635E or equivalent)
  2. Build and flash the image-bmc output to the 256Mb flash chip
  3. Replace existing flash chip on the motherboard (cradle closest to the battery)
  4. Manufacture a cable to connect to the COM2 header for the BMC console. COM2 is wired for a DB-9-style pin-out.
  5. Reconfigure both BMC_DEBUG1 (TX) and BMC_DEBUG2 (RX) jumpers to short pins 2-3.
  6. Boot OpenBMC on your Palmetto. The console runs at 115200baud.