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 0040h:0000h     RS-232 Communications Line Port Base Addresses
 0040h:0008h     Parallel Printer Port Base Addresses
 0040h:0010h     Equipment List
 0040h:0012h     Reserved (POST Status on PC Convertible)
 0040h:0013h     Memory Size
 0040h:0015h     Reserved (PC Convertible Battery Status)
 0040h:0017h     Shift Status
 0040h:0018h     Extended Shift Status
 0040h:0019h     Alt-Keypad Entry
 0040h:001Ah     Keyboard Buffer Head Pointer
 0040h:001Ch     Keyboard Buffer Tail Pointer
 0040h:001Eh     Keyboard Buffer
 0040h:003Eh     Diskette Drive Recalibrate Status
 0040h:003Fh     Diskette Drive Motor Status
 0040h:0040h     Motor Off Counter
 0040h:0041h     Last Diskette Drive Operation Status
 0040h:0042h     Diskette Drive Controller Status
 0040h:0049h     Display Mode
 0040h:004Ah     Number of Columns in Current Mode
 0040h:004Ch     Length of Regeneration Buffer
 0040h:004Eh     Starting Address of Regeneration Buffer
 0040h:0050h     Cursor Position (Column, Row) for Display Pages
 0040h:0060h     Cursor End Scan Line and Start Scan Line
 0040h:0062h     Current Display Page
 0040h:0063h     CRT Controller Base Address
 0040h:0065h     Current Setting of Mode Control Register
 0040h:0066h     Current Setting of Color Select Register (3x9h)
 0040h:0067h     Reserved
 0040h:006Ch     Long Integer with Timer Counter
 0040h:0070h     Timer Overflow Flag
 0040h:0071h     Break Key State
 0040h:0072h     Reset State Flag
 0040h:0074h     Last Fixed Disk Operation Status
 0040h:0075h     Number of Fixed Disks
 0040h:0076h     Reserved
 0040h:0077h     Reserved
 0040h:0078h     Time-Out Values for Parallel Printers
 0040h:007Ch     Time-Out Values for RS-232 Communications Lines
 0040h:0080h     Keyboard Buffer Start Offset Pointer
 0040h:0082h     Keyboard Buffer End Offset Pointer
 0040h:0084h     Number of Rows on Display, minus 1
 0040h:0085h     Character Height
 0040h:0087h     Video Control States
 0040h:0089h     Reserved
 0040h:008Bh     Diskette Media Control
 0040h:008Ch     Fixed Disk Controller Status
 0040h:008Dh     Fixed Disk Controller Error Status
 0040h:008Eh     Fixed Disk Interrupt Control
 0040h:008Fh     Reserved
 0040h:0090h     Diskette Drive 0 Media State
 0040h:0091h     Diskette Drive 1 Media State
 0040h:0092h     Reserved
 0040h:0094h     Drive 0 Current Track
 0040h:0095h     Drive 1 Current Track
 0040h:0096h     Keyboard Status and Type Flags
 0040h:0097h     Keyboard LED Status
 0040h:0098h     Double-Word Pointer to User Wait Complete Flag
 0040h:009Ch     Long Integer with User Wait Count (Microseconds)
 0040h:00A0h     Wait Active Flag
 0040h:00A1h     Reserved
 0040h:00A8h     Double-Word Pointer to Video Parameters for EGA
 0040h:00ACh     Reserved
 0040h:00F0h     Intra-Application Communications Area (ICA)
 0050h:0000h     Print Screen Status Byte
 0050h:0001h     Reserved
 0050h:0004h     Phantom Drive Flag
 0050h:0005h     Reserved

 FFFFh:0000h     FAR JMP to Beginning of Power-On Self Test (POST)
 FFFFh:0005h     ROM BIOS Release Date, in ASCII
 FFFFh:000Ch     Reserved
 FFFFh:000Eh     System Model ID