Requirements

Hardware

Amiga compatible machine with the native video hardware (original chip set, extended chip set or advanced chip set), M68040 or M68060 with MMU and lots of memory. 256 and hi colour screen modes require AGA.

Memory

TurboEVD needs a quite large amount of memory for its internal buffers therefore if you're running low in memory it might be helpful for you to know the actual memory requirements

Generally the amount of needed memory (in bytes) is an equation of

chip mem = width * height * num_bitplanes / 8;
fast mem = width * height * num_bitplanes / 4 + 8192 + width * height * num_bitplanes / 8 / 4096 * 4 + sizeof(evd_context) + sizeof( TurboEVD executable ) + sizeof( c2p routine );

The figures for the 15 bit hi colour (32768) mode are calculated a bit differently. Chip memory requirements are equivalent to the normal 8 bitplane display but a considerably larger chunk of fast memory is needed. Use the equation above but use 16 as the num_bitplanes then add additional 96 kB for the lookup table.

These are of course cirka figures. In reality there will be some more memory loss but not much. Here's a table of needed memory for different screen sizes.

Screen size Chip memory Fast memory
320x256x2 10240 bytes 32000 bytes
320x256x256 81920 bytes 180000 bytes
512x384x2 24576 bytes 64000 bytes
512x384x16 98304 bytes 210000 bytes
512x384x256 196608 bytes 410000 bytes
640x480x2 38400 bytes 90000 bytes
640x480x4 76800 bytes 170000 bytes
640x480x16 153600 bytes 320000 bytes
640x480x256 307200 bytes 630000 bytes
640x480x32768 307200 bytes 1336000 bytes
800x600x16 240000 bytes 500000 bytes
800x600x256 480000 bytes 980000 bytes
1024x768x16 393216 bytes 800000 bytes
1024x768x256 786432 bytes 1590000 bytes