896k.txt Info

were "reserved," they were not always fully occupied by hardware. 2.1 The A Segment (704K Expansion) The most common expansion involved the A segment ( A0000cap A 0000 AFFFFcap A cap F cap F cap F cap F

bytes) of memory. IBM reserved the upper 384 KB for hardware-specific tasks (BIOS, video memory, and expansion cards), leaving 640 KB for the operating system and applications. As software grew in complexity, enthusiasts sought ways to reclaim reserved address space for system RAM. 2. Technical Methodology 896K.txt

Because the IBM BIOS did not officially support RAM in these segments, some software that bypassed DOS to check memory limits would fail to "see" the extra space. 4. Historical Significance were "reserved," they were not always fully occupied

Achieving 896K required more aggressive "filling" of the upper memory area (UMA). This involved: As software grew in complexity, enthusiasts sought ways