Assembly OS that will boot after burned into CD.

smiddy wrote:

I think if you search hard enough on here, someone has left a CDROM iso image that can be used for what he wants

I have a set of macros for creating bootable floppy and ISO-images. In the simplest case one would be able to compile an ISO-image with the following code:

Code:

format binary as "iso"

include 'eltorito.inc'

macro bootcode
{
    jmp 0:configure
    configure:
    xor ax,ax
    mov ds,ax
    mov es,ax
    cli
    mov ss,ax
    mov sp,7c00h
    sti
    
    mov ax,1300h
    mov bx,000Ah
    xor dx,dx
    mov cx,message.end-message
    call message.end
        message db 'Hello. I am your OS.'
    .end:
    pop bp
    int 10h
    @@:
        hlt
    jmp @B
}

iso_image bootcode
endii

If there's a need to create a file/directory structure, one may use more advanced macro sets instead: "iso9660.inc" or "joliet.inc" . The tree definition syntax is pretty much the same as here. The relevant include files are attached.