Raspberry Pi 3B+ (ARM32 & ARM64)

Greetings!  I created an sd-card image for installing either SlackwareARM or Slarm64 onto a Raspberry Pi 3B+.  My Raspberry Pi 3B+ kernel source is linux-5.15.y source downloaded from Raspberry Pi source code repository, configured and compiled on my Raspberry Pi 3B+.

I installed both the full SlackwareARM and Slarm64 operating systems onto a 2TB USB Pocket Drive with slackwarearm-15.0 on /dev/sda2 and slarm64-15.0 on /dev/sda3,  and it all installed and worked successfully ( although the screen was greyscale with no color )

Before I shut down after each install
I had to mount the boot partition and edit the cmdline.txt file to change the location of OS block device.

After the reboot both SlackwareARM and Slarm64 booted and operated well.

Hardware Spec
    Broadcom BCM2837B0, Cortex-A53 (ARMv8) 64-bit SoC @ 1.4GHz
    1GB LPDDR2 SDRAM
    2.4GHz and 5GHz IEEE 802.11.b/g/n/ac wireless LAN, Bluetooth 4.2, BLE
    Gigabit Ethernet over USB 2.0 (maximum throughput 300 Mbps)
    Extended 40-pin GPIO header
    Full-size HDMI®
    4 USB 2.0 ports
    CSI camera port for connecting a Raspberry Pi camera
    DSI display port for connecting a Raspberry Pi touchscreen display
    4-pole stereo output and composite video port
    Micro SD port for loading your operating system and storing data
    5V/2.5A DC power input
    Power-over-Ethernet (PoE) support (requires separate PoE HAT)

Note: My Slarm64 suffered from the 1G RAM lockup problem spoken about on the Raspberry Pi forums, I did not witness SlackwareARM lockup while compiling.