'DUMPBIOS.SCR' Doesn't need to be changed in any way:

N E000E7FF.BIN
R BX
0000
R CX
8000
M E000:0 8000 0100
W 0100

N E800EFFF.BIN
R BX
0000
R CX
8000
M E800:0 8000 0100
W 0100

N F000F7FF.BIN
R BX
0000
R CX
8000
M F000:0 8000 0100
W 0100

N F800FFFF.BIN
R BX
0000
R CX
8000
M F800:0 8000 0100
W 0100

Q


'DUMPBIOS.BAT' should be changed for what you want the resulting file to be named, in this example, 'FILENAME.BIN':

DEBUG < DumpBIOS.SCR
COPY /B E000E7FF.BIN+E800EFFF.BIN ESEGBIOS.BIN
COPY /B F000F7FF.BIN+F800FFFF.BIN FSEGBIOS.BIN
COPY /B ESEGBIOS.BIN+FSEGBIOS.BIN FILENAME.BIN


If DOS DEBUG is in a PATH that the system can find ("PATH=C:\DOS" as an example) just run 'DUMPBIOS' at the command prompt.