Installing MS-DOS over Emerson ROM DOS (75188)
The information in this article applies to:
• Microsoft MS-DOS operating system 5.0
• Microsoft MS-DOS operating system 5.0a
• Microsoft MS-DOS operating system 6.0
• Microsoft MS-DOS operating system 6.2
• Microsoft MS-DOS operating system 6.21
• Microsoft MS-DOS operating system 6.22
This article was previously published under Q75188
Some Emerson computer systems are equipped with ROM DOS (the operating
system is contained in the computer's read-only memory). Installing the MS-
DOS 5 or later upgrade on these systems could cause the system to stop
responding (hang) after it is rebooted.
To work around this problem disable the system's ROM DOS.
Emerson systems with model numbers ending in V have an added sound
feature that uses voice simulation to speak out DOS errors. This
feature is written into the ROM DOS. If the ROM DOS is disabled and
MS-DOS 5.0 or later is installed, the sound feature does not work.
The Emerson systems that use ROM DOS are as follows:
XT Class Machines
AT Class Machines
To work around this problem, you can disable the boot from ROM DOS and
have the computer boot from disk. There is a different procedure for
XT and or AT class machines. To disable the ROM DOS boot, do the
• If you have a XT class machine, press CTRL+ALT+ESC during startup.
If you have a AT class machine, press CTRL+ALT+S during startup.
This will bring you to the CMOS menu.
• Choose SETUP from the menu and press ENTER.
• On the right side of the screen there is an entry for the
boot device. Highlight ROM and press F5 for next value or F6
for previous value (there are only two values so you can press
either one to toggle to Disk).
• Press F10 to save the configuration.
• Reboot the system by pressing ESC three times.
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