Commodore Factory Burn In Diagnostics for B Series A MUST-HAVE for repair of your B Series systems. This official factory final burn-in program identifies faults in all key chips. Has correctly detected faulty DRAM, 6526, 6551, ROM, & SRAM chips in my experience. Dload b-128/256 test and type run. Tested on B500,B128,CBM 128-80, CBM 256-80. Submitted by Edward Shockley drshock@insectria.net From the B Series Collection at http://www.insectria.net/b128.html