GSC. HP proprietary bus. Initially used for I/O, but PA-7100LC & PA-7300LC processors connect directly to the GSC bus. GSC comes in several variants: GSC-1X. The original GSC bus implemented on PCX-L and used in the Gecko, Mirage and Electra computers. Peak Bandwidth 142MB/s w/DMA, 106 MB/s with PIO writes. GSC