What is the largest single block size that can be loaded into the Pattern Generator?

What is the largest single block size that can be loaded into the Pattern Generator?

A single block can use the entire memory depth of the Pattern Generator. The standard configuration comes with 256Kb deep memory which allows a 262144 sample per channel vector. One can use half the channels and get 512Kb of samples per channel. There is an upgrade 1M that will increase the deep memory to 1Mb at full channel mode and 2Mb at half channel mode.