0xB9 == G_SETOTHERMODE_L in this non-F3DEX2 build (G_IMMFIRST-6); fast3d
handles it as gsDPSetRenderMode. -level_09 sustained-fire run: zero D146
aborts, zero warnings. Re-scoped to the 2-cycle/cycletype hypothesis
(records never set G_MDSFT_CYCLETYPE -> use_2cyc==0 on PC -> TEXEL1
garbage -> magenta/cyan).