896k.txt

Breaking the 640K Barrier: The Legacy of 896K.txt and Early PC Memory Expansion

If a user lacked a high-resolution video card or specific expansion ROMs, segments B and E could sometimes be populated with RAM. 896K.txt

). On systems using standard MDA or CGA video cards, this segment was often empty. By installing RAM chips that responded to these addresses, users could gain an additional 64K, bringing the total contiguous memory to . Standard MS-DOS/PC-DOS versions could recognize this memory without a specialized BIOS. 2.2 Reaching 896K Breaking the 640K Barrier: The Legacy of 896K