This is mainly useful to inspect the BIOS and its data such as the Interrupt Vector Table.
I made it because somebody asked me to post the BIOS image from my 386DX.
Here is that BIOS image embedded in the main 1-Megabyte BIOS/DOS image (the BIOS is located at physical address 0xF0000-0xFFFFF) so that's the offset to inspect with a hex editor like HIEW:
SAVEMEG.DAT
README.TXT
DOS COM binary only:
SAVEMEG.COM
Full source code, development tools and binary:
The source code is very easy to follow. It's made up of tiny tricks (one trick turned into a data structure or function per individual source code file), and the files and functions have ordinal names so it's obvious to see what I implemented first and what point of the implementation of the code I'm using for all lines of code.
Also, this is the directory structure of the program:
/ -- The main directory contains code specific to the intended OS, for each targeted platform (one per ZIP)
/app -- Portable Cross-platform application code
/arch/sw -- OS-specific functions and data
/arch/hw -- hardware-specific functions and data
/_TOOLS_ -- development tools
Code: Select all
Standard Memory Map:
0x00000000-0x000003FF -- Real Mode Interrupt Vector Table
0x00000400-0x000004FF -- BIOS Data Area
0x00007C00-0x00007DFF -- 512-byte Boot Sector
0x0009FC00-0x0009FFFF -- EBDA (Extended BIOS Data Area)
0x000A0000-0x000BFFFF -- VGA video RAM
0x000C0000-0x000C7FFF -- Video BIOS
0x000C8000-0x000EFFFF -- Miscellaneous reserved memory
0x000F0000-0x000FFFFF -- Motherboard ROM BIOS Image