in wipe screen move I_DrawBuffer() outside of the loop

refactor FixedMul32OrigFriction

viewwindow with a width that's a power of two

use mulu in FixedMul3216

use a sound lump directly, don't copy it to a buffer

Atari ST digital sound effects

replace _ffread by fread

Digital sound effects filenames start with DS instead of DP, which are for PC speaker sound effects

damage palette

move firstsfx from i_audo to i_ast, i_mac, etc.

Macintosh (#23)

Atari ST

I_Error space

refactor V_DrawLine

tracer isn't used