Hi David, eBay seller acpsurplus has Western Digital WD2793s and some SAB2793s which are a Siemens version according to the listing. He is a California based seller and every device I have purchased from him has been genuine old stock. I have no connections to acpsurplus, just a satisfied customer. Cheers, Ian.
On Sun, Jun 29, 2014 at 2:46 PM, David Fry <[email protected]> wrote: > Hi all, > > does anyone know a reliable source for a WD2793 floppy controller ic, I > have been looking on ebay and am also concerned that many of the TMS2793 > look suspicious, too many suppliers with identically printed/date coded > chips. I can believe that there is a large stash of these parts in China. > the whole fake IC this is very frustrating, I buy from reputable suppliers > where possible but many of these chips are obsolete/not stocked. > > wrt 20mhz Z80 CPU , Mouser has 119 DIP's on order with an estimated > delivery of 3/10/2014 for those who can wait > > http://uk.mouser.com/Search/Refine.aspx?Keyword=z84c0020 > > regards > > David Fry > > On Sunday, June 29, 2014 3:44:02 AM UTC+1, curt mayer wrote: > >> 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. > -- 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.
