Awesome. Make me one please! Now I can sell my cat box. -- Sent from my Palm Pre On Jun 17, 2010 5:37 AM, Kevin Moore <talon.k@gmail.com> wrote: I just went ahead and built a clock divider out of 1 74s74 connecting the clock from a normal 6502 nop, into pin 3, then feeding not q pin 6 into d pin 2. and using q pin 5 as my new clock. It get's atari sigs now, and if I need to just use normal 5004a sigs, I can just pull the clock divider. Kevin On Thu, Jun 17, 2010 at 3:36 AM, Martin White <martin@guddler.co.uk> wrote: > > > 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! > > That won't give catbox signatures on the 5004 though. > > It was me that posted about it I think. When I built mine I just used the > schematics for the catbox. I'm sure Andy Welburn built one as well and I > think he made his slightly differently? Maybe he wrote up some schems? > > > 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/ > _______________________________________________ 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/ _______________________________________________ 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/