Could not find a DS8136 in any book but found the DM8136 in the 1981 National Semiconductor Logic Databook, section 7. It is a 6-bit Unified Bus COmparator, 16 pin. used to compare two 6 bit words. I have the paper copy of the documentation, only 3 pages. I'll post more if somebody needs it, or do it offline. Joe Heck