Apple PC Compatibility Card - Manual (Page 291)

Using DOS video utilities
For instructions on installing utilities, see “Configuring Video Software in
DOS,” earlier in this appendix.
VESA BIOS Extension
The VESA BIOS Extension (VBE) utility is a DOS TSR program called
M64VBE.COM. This program supports software running on VESA modes
using mach64 features. If your software and/or games conform to the VBE
standard, you should load M64VBE.COM before using your software.
To change to the MACH64 directory and load the utility, type the following:
C: \
CD \MACH64
M64VBE
Note: You may want to add the M64VBE line to your AUTOEXEC.BAT file.
To display help, type:
M64VBE ?
To unload the utility, type:
M64VBE U
Refer to your DOS documentation for more information about TSR programs.
DPMS for DOS
DPMS—the Display Power Management Signaling system—is not supported
by the PC Compatibility Card.
291 Configuring Video Software