Okay, let's assume that the ROM appears at the standard location of C000:0000. You then do the following:
Code:
>debug
-dc000:0
... and you'll get the following display or something very like it.:
C000:0000 55 AA 01 CB 90 44 4F 53-45 4D 55 20 56 47 41 2F U....DOSEMU VGA/
C000:0010 56 42 45 20 32 2E 30 20-45 6D 75 6C 61 74 6F 72 VBE 2.0 Emulator
C000:0020 00 44 4F 53 45 4D 55 20-56 47 41 65 6D 75 2E 20 .DOSEMU VGAemu.
C000:0030 28 43 29 20 31 39 39 35-20 31 39 39 36 2C 20 49 (C) 1995 1996, I
C000:0040 2E 41 2E 20 46 69 6C 69-75 73 20 61 6E 64 20 4A .A. Filius and J
C000:0050 2E 41 2E 4B 2E 20 4D 6F-75 77 00 56 45 53 41 20 .A.K. Mouw.VESA
C000:0060 42 49 4F 53 20 45 78 74-65 6E 73 69 6F 6E 73 20 BIOS Extensions
C000:0070 56 32 2E 30 20 66 6F 72-20 44 4F 53 45 4D 55 2E V2.0 for DOSEMU.
I'm running DOS on a DOS emulator under Linux, so you get some stuff about it being "emulated". NB: without the BIOS extension code, you'll get squat for EGA.