Building a Sixty-Clone ? Use the right chips!

[Deleted member 14264]

Finally, somebody made a video about CMOS vs TTL logic chips and fake Chinese chips.

https://www.youtube.com/watch?v=Knfv-Qp7Q2U&ab_channel=Noel'sRetroLab

So, if you build a Sixty-Clone: DON'T BUY ANYTHING FROM CHINA! Get your chips from an official distributor such as Digikey, Mouser or Avnet.

Make sure you use the correct logic ICs and these are 74LS or 74HCT
See:
https://www.allaboutcircuits.com/textbook/digital/chpt-3/logic-signal-voltage-levels/

https://www.onsemi.com/pub/Collateral/AN-368.pdf

 

[Deleted member 14264]

Please note the problems with this 1581 board replica were all caused by a single fake 74LS14 chips which turned out to be a CMOS rebranded chip.

See post by WES256 here: https://www.amibay.com/showthread.php?118462-Commodore-1581-drive-mainboard-kit-replica/page4