GFK-1536C

This version of CPU001 provides:
` Support for intelligent I/O modules.
` Scaling function blocks. Two new function blocks can be used to scale input data. One function block is for unipolar (unsigned) input data. The other function block is for bipolar (signed) input data.
` Drum Sequencer function block. This new function block works like a mechanical drum sequencer. It allows a sequence of output combinations to be selected in turn. See the heading "The Drum Sequencer Function" for more information.