Abstract: BSAB, an automatic wire routing system for LSI/VLSI building-block layout design which is implemented on SUN workstation under UNIX operating system, is presented. The system configuration, the method of channel definition and the global and channel routing algorithms used in RSAB are described in this paper. RSAB can route various kinds of nets including power/ground nets and critical nets automatically. At present, it has been incorporated into Magic interactive layout system which has friendly user interfaces. An automatic/interactive layout environment has been established. Experimental results are encouraging and show that RSAB is a useful and promising routing system.

Key words: routing, channel routing, layout, VDSI CAD