Kevin Moore wrote:
I'm looking for some schematics to build a 6502 NOP that will produce catbox sigs when used with the HP5004a. I think someone mentioned they built one with 2 ls393's I assume that would be the easiest way, instead of building a clock divider to use for my clock signal.
If someone could point me in the right direction..
Thanks,
Kevin __________
A NOP can easily be built by using a 6502 CPU and bending the data lines up over the top, then hardwire them to NOP and disable any watchdog reset, then plug the modified CPU into the board and power it up! I have a picture up on TTL FTP of several modified CPUs and an Eprom (can't remember using that - might work), also a PDF of an article written back in the 70s about making your own...both of these are files starting with "NOP". 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/