mov word [es:0], 020CDh ; INT 20h instruction
; First non-free paragraph
- mov word [es:02h], comboot_seg+1000h
+ ; This is valid because comboot_seg == real_mode_seg
+ ; == the highest segment used by all derivatives
+ int 12h ; Get DOS memory size
+ shl ax,6 ; Kilobytes -> paragraphs
+ mov word [es:02h],ax
; Copy the command line from high memory
mov cx,125 ; Max cmdline len (minus space and CR)