CD2481 Datasheet, PDF (108/222 Pages) Intel Corporation – Programmable Four-Channel Communications Controller

CD2481 — Programmable Four-Channel Communications Controller
outportb( COR1, NO_ADDR | FLAG_2 );// No address matching,
outportb( COR2, CRC_V41 );// 2 opening flags
outportb( COR3, 0 );
outportb( COR4, thresh );// FIFO threshold
outportb( COR5, 0);
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Datasheet