[noone_youknow]

Sorry for the confusion, I was referring to the putchar not being implemented in OPs code, I got yours working right away (nice work btw).

What you mention about VGA being common on x86 was what got me curious, since it’s not a thing on riscv. In my own OS project I’m using a framebuffer to show a graphical terminal on both x86 and riscv64 so I wondered if OP was doing similar or was really using SBI output.