I don’t know what output to the VGA means from the OP. I suspect that entire project was vibe coded including the readme. It’s a common first step when writing an OS for x86 but for riscv you don’t use vga to get text output, you go through the UART.

Are you saying you had trouble getting putchar working in my implementation? As far as I know common.console is fully implemented and working. Let me know if something is wrong.