Toshiba Corp is now shipping first samples of its long-awaited R4X00 Tiger Shark chip set which equips R4000, R4400 and R4600 RISC chips with the 80486 bus. Samples are free. Toshiba has previously quoted prices of $65 each in quantities of 1,000-up. Design wins could reportedly start coming forward next month but production isn't likely until the end of the quarter. Toshiba has also started work on a new Peripheral Component Interconnect chip set code-named Maco, and hopes to show it at Comdex/Spring.