x86 16-bit Assembly debugging issues with QEMU

Question

I am new to x86 assembly but been a programmer for nearly 34 years. I am writing a 16 bit OS and everything is working ok to a degree. The program is split into a Bootloader and Kernel Binaries which then joined into a single image file. When running the program through QEMU the Bootloader runs and loads at 0x7c00 fine and displays messages on the screen and successfully loads the Kernel into 0x7e00 and successfully starts the process which clears the screen and sets the cursor in the top left of the screen. However when it then goes to display messages to the screen it fails. When objdumping the Kernel Binary I can see that the binary is set to load the first byte into the SI register at the correct address however nothing happens. Adjusting the address it turns out that the address is being offset by 230-255 bytes after the correct position. I have set all of the segment registers to zero and still makes no difference. Does anyone have any ideas on the cause and fix and if there is anyway of debugging a raw binary file through QEMU. Every link i have looked at only shows how to debug an ELF file through GDB linking into QEMU via a TCP Port.