Hi all, A local second-hand store got a bunch of TTL and CMOS chips, maybe 500 pieces in all. It's kind of odd -- some are in original retail bags, some are in old glass medicine bottles with corks. Someone's basement workshop collection, I guess. I looked through them, wrote down some numbers. They're selling them for about $3 per dozen for the ones in larger quantities. Anyone interested in MM5262 2K dynamic RAMs? Loads of these, in original retail plastic bags (antistatic? I think not). These are interesting, I'm going to pick these up for projects: 8642 quad bus tranceiver? 8836 single-ended bus receiver (Unibus?) 8838 quad bus tranceiver (Unibus?) MM5311 digital clock 5371 digital clock, 4 digits, 50 Hz 5781 programmable controller or calculator? MM5780 (2 digit toy calculator?) MM5799 4-bit microcontroller 5841 serial shift input, 8 bit NPN drivers (50V, 500 MA) (if this is really what they are, they're really fun) Anyone have any info on the M5799? These look like TTL. Anything of special interest in this list? 8092 dual 5-input NAND w/2 inv. inputs 8094 non-inv function buffer gate (if National, DM) 8136 6-bit identity comparator 8601 single RC timer? 8664 7 segment decoder/driver 8796 General purpose Mask Prog ROM (no idea what version) 8806 4-input AND function gate? (if SE/SL/NE) 8828 Dual D flipflop? 8856 programmable counter 8880 Hi volt 7 seg decod/driv 74174 Hex D FF 74181 TTL ALU function generator Others, can not determine what they are. Any ideas? I can go back and try to get manufacturer letters: 5737 ??? 5782 ??? 7504 ??? 7506 ??? 7515 ??? 7517 ??? 8096 ??? 8098 ??? 8670 ??? 8681 ??? 8817 ??? 16254 ??? 60769 ??? 141097 national semi, no idea These seem pretty common, not worth bothering with: 4016 CMOS quad bilateral switch 4019 CMOS quad 2-input mux 4021 CMOS 8-bit shift reg 4049 CMOS hex inv buffer 4066 CMOS quad bilateral switch MM5221 mask prog. ROM (no idea what's on them) Brian