Videopac / Odyssey2 forum

Emulation => Emulating the Videopac / Odyssey2 => Topic started by: bataais on June 03, 2016, 04:55:17 PM



Title: O2EM LFSR Sound Fix
Post by: bataais on June 03, 2016, 04:55:17 PM
Fix for this, adapted from mess/mame i8244.c:

O2EM generate pseudo-random 1-bit noise using C rand()%2 calls, while real hardware use linear input feed back from it's 24 bit shift register (LFSR) .

Additionally, O2EM only output sound to audio buffer, but forget to rewrite shifted values to odyssey 24 bit shift register.

https://sourceforge.net/p/o2em/bugs/5/#f795