I've got a 8088 cpu blank, and a z80 cpu populated. I bought a 10 chip lot of z84c0002pec's from ebay, and was a bit horrified when I got them to find that they smelled of new paint. identical fronts, but the backs showed different countries (indonesia and phillipines), all with different mold imprints.
obviously shenanigans. so, I wired up a 20mhz test rig for the z80's, using a derivative of dunfield's no-ram monitor (i disassembled it and added a lot more code), and not a one tested out at 20 mhz. one limped at 16, 2 ran at 12, and the rest were good at 8. all tested as cmos: the out (C),F instruction sends FF, the nmos sends 00. for 15 bucks, I got a bunch of mildly useful z80s of unknown actual characteristics. anyhow, now i want to build the 8088 board with V20's - NEC has a part number for dip-40's at 16mhz. 70108hcz-16. lots of them available on ebay from china. any experiences here before I become the ebay counterfeit chip crash test dummy? --curt -- You received this message because you are subscribed to the Google Groups "N8VEM-S100" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
