896k.txt -
On the IBM XT (5160) motherboard, this often required altering the decoder logic (e.g., using a 74LS138 decoder) to enable the RAM parity checks and chip select signals for these high addresses. 3. Compatibility and Limitations
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 896K.txt
High-end EGA and VGA cards utilized the A segment for their frame buffers, making the 704K/896K mod incompatible with modern (for the time) graphics. On the IBM XT (5160) motherboard, this often
The 896K.txt methodology relies on the fact that while the memory segments A000hcap A 000 h FFFFhcap F cap F cap F cap F h it introduced several risks:
While 896K provided a massive boost for memory-resident programs (TSRs) and large spreadsheets, it introduced several risks:
