Fast & precise
Move rooms and symbols with mouse or set their sizes and distances numerically when high precision is required.
Multi-platform
Use your mobile device on location and complete the work on your computer at the office.
3D mode
See your project in 3D, as many floors as you need. Camera can be freely positioned.
Create detailed and precise floor plans. See them in 3D or print to scale. Add furniture to design interior of your home. Have your floor plan with you while shopping to check if there is enough room for a new furniture.
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
If a user lacked a high-resolution video card or specific expansion ROMs, segments B and E could sometimes be populated with RAM.
The 896K.txt file remains a foundational document in the history of PC architecture. It serves as a reminder of a period when hardware constraints were absolute, and the only way forward was to redefine the boundaries of the machine itself. 896K.txt
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
Breaking the 640K Barrier: The Legacy of 896K.txt and Early PC Memory Expansion bytes) of memory
The original IBM PC architecture utilized the Intel 8088 processor, which had a 20-bit address bus capable of addressing 1 MB ( 2202 to the 20th power
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. It serves as a reminder of a period
). 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