This is all the bits you need to play with recent linux on mc68000

1. Press the bootloader button and then reset button
2. Open minicom, set your baud to 9600
3. Open the transfer methods configuration and update ascii to ascii-xfr -dsv -l 1. This adds a delay between lines for the mc68ez328 bootloader to catch up.
4. Open the file transfer menu and send the u-boot SPL payload.b via ascii
5. Send 0040000000 to jump to the SPL
6. Wait for the SPL to boot and start printing CCC..
7. Open the file transfer menu and send the u-boot binary u-boot.img
8. Wait for u-boot to boot. The SPL will complain the CRC is incorrect. This is due to some things being mapped over the memory in bootloader mode.
9. Send the command mw.l 0x100000 0xffffffff 0x12000; loady 0x100000 57600 to clear the target memory and start loading over ymodem. Follow the u-boot prompt to change the baud rate.
10. Send u-boot.bin (Needs to be the .bin not .img as we need it without the header)
11. Erase the first part of the flash and write u-boot there with erase 0x10000000 0x48000; cp.l 0x100000 0x10000000 0x12000
12. You should now be able to reset and see u-boot load up from flash.

1. On an SD card you need:
   • 2 or more partitions.
   • The first should be FAT formatted.
   • The second shouldn't be formatted.
2. Put the kernel elf on the FAT partition
3. dd the squashfs rootfs to the second partition.

J4:

• 13 (SCLK) -> SD clk
• 15 (STXD) -> SD MOSI
• 16 (SRXD) -> SD MISO
• 2 (PD0) -> SD CS
• 1 (PD1) -> SD vcc on (Optional but might be needed to get some cards to init)