0:400h                  RS-232 Communications Line Port Base Addresses 
 0:408h                  Parallel Printer Port Base Addresses 
 0:410h                  Equipment List 
 0:412h                  Reserved (POST Status on PC Convertible) 
 0:413h                  Memory Size 
 0:415h                  Reserved (PC Convertible Battery Status) 
 0:417h                  Shift Status 
 0:418h                  Extended Shift Status 
 0:419h                  Alternate Keypad Entry 
 0:41Ah                  Keyboard Buffer Head Pointer 
 0:41Ch                  Keyboard Buffer Tail Pointer 
 0:41Eh                  Keyboard Buffer 
 0:43Eh                  Diskette Drive Recalibrate Status 
 0:43Fh                  Diskette Drive Motor Status 
 0:440h                  Motor Off Counter 
 0:441h                  Last Diskette Drive Operation Status 
 0:442h                  Diskette Drive Controller Status 
 0:449h                  Display Mode 
 0:44Ah                  Number of Columns in Current Mode 
 0:44Ch                  Length of Regen Buffer 
 0:44Eh                  Starting Address of Regen Buffer 
 0:450h                  Cursor Position (Column, Row) for Display Pages 
 0:460h                  Cursor End Scan Line and Start Scan Line 
 0:462h                  Current Display Page 
 0:463h                  CRT Controller Base Address 
 0:465h                  Current Setting of Mode Control Register 
 0:466h                  Current Setting of Color Select Register (3x9h) 
 0:467h                  Reserved 
 0:46Ch                  Long Integer with Timer Counter 
 0:470h                  Timer Overflow Flag 
 0:471h                  Break Key State 
 0:472h                  Reset State Flag 
 0:474h                  Last Fixed Disk Operation Status 
 0:475h                  Number of Fixed Disks 
 0:476h                  Reserved 
 0:477h                  Reserved 
 0:478h                  Time-Out Values for Parallel Printers 
 0:47Ch                  Time-Out Values for RS-232 Communications Lines 
 0:480h                  Keyboard Buffer Start Offset Pointer 
 0:482h                  Keyboard Buffer End Offset Pointer 
 0:484h                  Number of Rows on Display, minus 1 
 0:485h                  Character Height 
 0:487h                  Video Control States 
 0:489h                  Reserved 
 0:48Bh                  Diskette Media Control 
 0:48Ch                  Fixed Disk Controller Status 
 0:48Dh                  Fixed Disk Controller Error Status 
 0:48Eh                  Fixed Disk Interrupt Control 
 0:48Fh                  Reserved 
 0:490h                  Diskette Drive 0 Media State 
 0:491h                  Diskette Drive 1 Media State 
 0:492h                  Reserved 
 0:494h                  Drive 0 Current Track 
 0:495h                  Drive 1 Current Track 
 0:496h                  Keyboard Status and Type Flags 
 0:497h                  Keyboard LED Status 
 0:498h                  Double-Word Pointer to User Wait Complete Flag 
 0:49Ch                  Long Integer with User Wait Count (Microseconds) 
 0:4A0h                  Wait Active Flag 
 0:4A1h                  Reserved 
 0:4A8h                  Double-Word Pointer to Video Parameters for EGA 
 0:4ACh                  Reserved 
 0:4F0h                  Intra-Application Communications Area (ICA) 
 0:500h                  Print Screen Status Byte (See INT 05h) 
 0:501h                  Reserved 
 0:504h                  Phantom Drive Flag 
 0:505h                  Reserved 

 F000:FFF0h              FAR JMP to Beginning of Power-On Self Test (POST) 
 F000:FFF5h              ROM BIOS Release Date, in ASCII 
 F000:FFFCh              Reserved 
 F000:FFFEh              System Model ID