Romain Naour a2331c8a61 board/qemu/sh4-r2d: fix sh4 kernel bug with binutils 2.33 %!s(int64=4) %!d(string=hai) anos
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patches a2331c8a61 board/qemu/sh4-r2d: fix sh4 kernel bug with binutils 2.33 %!s(int64=3) %!d(string=hai) anos
linux.config 03fb00f217 qemu: update defconfigs to Linux 4.16.7 %!s(int64=6) %!d(string=hai) anos
readme.txt 7dcb9e98b5 board/qemu: remove the Qemu version from readme.txt %!s(int64=4) %!d(string=hai) anos

readme.txt

Run the emulation with:

qemu-system-sh4 -M r2d -kernel output/images/zImage -drive file=output/images/rootfs.ext2,if=ide,format=raw -append "rootwait root=/dev/sda console=ttySC1,115200 noiotrap" -serial null -serial stdio -net nic,model=rtl8139 -net user # qemu_sh4_r2d_defconfig

The login prompt will appear in the terminal that started Qemu.
The graphical window is the framebuffer.