16-bit Arachne for DOS Memory Map

Memory type | Min | Max | How Arachne uses it DOS memory | 425 kB | 640 kB | Program code and frequently accessed data, xSwap(TM) cache
xSwap(TM) virtual memory | 500 kB | cca 3 MB | Configuration files ("Arachne registry"), HTML pages. Can be located in swap files on current drive, in EMS or in XMS.
Swap files | 500 kB | 3 MB | xSwap(TM) virtual memory and various temporary batch, data and index files. Swap files are located on current DOS drive, which can be either RAM disk or hard disk. Floppy disks are too slow.
EMS (optional) | 500 kB | 3 MB | xSwap(TM) virtual memory
XMS (optional) | 500 kB | up to cca 32 MB | xSwap(TM) virtual memory, virtual screens (up to 6 screens, each 1600x16000 pixels big) font caching (up to 50 fonts). Maximum vertical size of virtual screen is usually 5000 pixels, so typicaly Arachne uses up to 6 MB of XMS.
DPMI | 0 kB | not limited | required by 32bit version of DJPEG and by 32bit PNG2BMP; do not use DR-DOS DMPI driver - CWSDPMI is included in Arachne package.

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