Error-tolerant video display subsystem

Details Error-tolerant video display subsystem Error-tolerant video display subsystem

1996-03-08

1998-12-15

Bayerl, Raymond J.

395436, 395437, 395849, 395877, 395513, G09G 500

Patent

active

058505725

ABSTRACT:
A Video Display FIFO includes a circular buffer and counters that allow the FIFO to properly recover from data alignment problems caused by FIFO underflow. A pair of counters store read and write pointers, which indicate the addresses of data read from and written into the buffer. Another counter stores a count of data in the buffer. Buffer underflow causes the count to go negative and the read pointer to advance ahead of the write pointer. Data written into the buffer while the total count is negative is not read out of the buffer. This allows alignment of the data to be restored.

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