Clay Cowgill wrote:
He has no documentation left nor does he have information on the delay lines chosen - he designed this over twenty years ago and there was very little call for it...Shy also says that this is freely given by him, he is happy to share it.
Those look like Dallas parts (at least pin-out wise). Probably 100ns and 50ns?
http://datasheets.maxim-ic.com/en/ds/DS1005.pdf
-Clay
Certainly two of the devices appear to be DS1005-100, however I do not see where there is a -50 device. -60 seems to be the lowest number. Shy did say they were from Dallas, so perhaps a data book from the late 80s (or early 90s) will show if there was a -50 version. I see no reason not to use the -60 as Shy said one has to 'tune' the adapter to each application. Obviously a routine needs to be written as well (no documentation left) to set up the 6821 to mimic the 6803s output ports - part of that is the setting of the Select address for the 6821, then one has to set its registers... John :-#)# _______________________________________________ Techtoolslist mailing list Techtoolslist@flippers.com http://seven.pairlist.net/mailman/listinfo/techtoolslist FTP site is: ftp://ftp.flippers.com/TTL/TestEquipment Archive site: http://seven.pairlist.net/pipermail/techtoolslist/