CMOS(Complementary Metal-Oxide-Semiconductor) A type of integrated circuit design known for its low power consumption. 23h - MCA - Programmable Option Select configuration byte 4
                                                                                

CMOS(Complementary Metal-Oxide-Semiconductor) A type of integrated circuit design known for its low power consumption. 23h - AMIAmerican Megatrends, Inc.(American Megatrends, Inc.) A hardware, software and firmware company founded in 1985. - First Hard Disk user defined: # of Sectors per track
                                                                                

CMOS(Complementary Metal-Oxide-Semiconductor) A type of integrated circuit design known for its low power consumption. 23h - AMIAmerican Megatrends, Inc.(American Megatrends, Inc.) A hardware, software and firmware company founded in 1985. WinBIOS - Second Hard Disk user defined: # Cylinders, Low Byte
                                                                                

CMOS(Complementary Metal-Oxide-Semiconductor) A type of integrated circuit design known for its low power consumption. 23h - AMSTRAD - INITIAL VDU(Video Display Unit)  Mainframe-speak for computer monitor. MODE AND DRIVE COUNT
Note:	default: 20h


Bitfields for Amstrad initial VDU(Video Display Unit)  Mainframe-speak for computer monitor. mode/drive count:
Bit(s)	Description	(Table C0027)
 7	enables extended serial flow control (NB this is buggy)
 6	set if two floppy drives installed
 5-4	(from Amstrad 1640 tech ref)
	00    Internal video adapter
	01    CGAColor Graphics Adapter(Color/Graphics Adapter) One of the two video display boards introduced together with the original IBMInternational Busiuness Machines PCIBM PC.  See also HGC, MDA. card added; 40 x 25 mode
	10    CGAColor Graphics Adapter(Color/Graphics Adapter) One of the two video display boards introduced together with the original IBMInternational Busiuness Machines PCIBM PC.  See also HGC, MDA. card added; 80 x 25 mode
	11    mono card added; 80 x 25 mode
                                                                                

CMOS(Complementary Metal-Oxide-Semiconductor) A type of integrated circuit design known for its low power consumption. 23h - PHOENIX - First user defined hard disk (type 48) Write Precomp. LSB
                                                                                

CMOS(Complementary Metal-Oxide-Semiconductor) A type of integrated circuit design known for its low power consumption. 23h - AWARD - 2nd Hard Disk user defined (type 48): Landing Zone Low Byte
                                                                                

CMOS(Complementary Metal-Oxide-Semiconductor) A type of integrated circuit design known for its low power consumption. 23h - Quadtel HT 12 BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware.  The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly. - second user def. drive: # of cylinders low byte