Apparatus and method for forming a sequencer link for a sequencer controlled by a micro-program

摘要

Apparatus for forming a sequence in a direct memory access controller. The apparatus includes a microprogram-controlled sequencer for selecting microaddresses, a software decoder connected to the sequencer for testing presence of jump conditions and for preparing a corresponding jump address, a map decoder connected to the sequencer for testing map conditions and for providing a map address, a test register connected to the sequencer for providing a test address, and apparatus for generating a continue-address connected to the sequencer. The jump conditions, the jump addresses and the map conditions are contained in microcommands of the microprogram.