SHAOSJust put together NEDONAND-3 with 2 NEDONAND-2 and NEDONAND-16 ROM "programmed" with 4-bit to Hex converter to display 4-bit address in human readable format:
This is ROM alone (I drilled a few holes and installed 7-segment indicator directly on the board):
Discussions
Become a Hackaday.io Member
Create an account to leave a comment. Already have an account? Log In.
Negative logic, I see :-)
Are you sure? yes | no
Yes, because LEDs must be connected between power and TTL outputs to work properly with TTL so all lights are inverted - then I used diodes for "zeros" instead of "ones" (it's actually less diodes in this case ; )
P.S. In true ROM application with the same board it will be diodes for "ones" though...
Are you sure? yes | no