WCMiller, congratulations on finding the issue. Hopefully the discussion above has helped in general terms too. I hate breadboards with a passion, to the extent of having designed a replacement which requires you to solder the chips and links in place; if you find it interesting I can post the ...

Just noticing in your last schematic that a lot of pins are to be tied to ground. Some breadboards are notorious for having lousy connections. It might be an idea to use a multimeter in continuity mode to ensure all those pins are well connected to pin 16. And/or use the meter on the Vdc function ...

Oh, to be clear I meant deciding between using (all) CMOS or TTL. Mixing them would be well beyond my ken.

Also, if I'm understanding things correctly, the ONLY real practical differences between say, different TTL-level 74xx families would be speed and power consumption (and attendant side effects, like signal reflection at higher speeds or more heat with more power consumption)? While TTL vs CMOS for ...

Regarding your test circuit:
- Ensure that you have power to your chip - ground to pin 16, 5v to pin 32. Remember that a DIP package starts with pin one at the top left and goes anticlockwise until you get to Vcc. According to the datasheet, pin one is marked with either a notch in the top edge ...

Ok, first of all THANK YOU all for the responses; I'm so appreciative of the help y'all are giving me. Second, on reflection maybe this should be moved to the "Newbies" board, especially with some of the questions I'm going to be asking. I'll leave that up to the moderators. Now, to address people ...

When I read it on my computer, it says that the value at 0x00000 is 0x19 (or 00011001), and that is what I wrote to it when I set it up initially.

* NC pins should be left unconnected.

Disconnected it, no change

* You have OE# and CE# connected to +5V which means they are disabled, they use low level logic according to the datasheet you linked.

Additionally some folks are color blind here, and it is easier for them to read your ...

Rough schematic. How's that?

I've finally started taking steps to move my designs beyond paper to actual breadboard implementations... and I'm running into issues immediately. I'm a complete breadboard noob, so I apologize if my issue turns out to be overly basic.

Right now, I'm trying to build a simple NAND flash chip reader ...

I'm 28 (in hexadecimal; 40 in regular old decimal. I think I prefer hex...)

I definitely think writing an emulator would be the best first step. I might modify an existing 6502 one the get a minimal viable product (the typescript one listed in the emulation channel might be a good start for me, as it ties into my actual programming skill set).

Eh, life happens. I'll be interested in seeing things when this project wakes up!

@AndrewP, @John West, thanks for the... I guess validation of the "interesting-ness" of the opcode+memory mixing idea; it was the only part of this that I think actually had the potential to actually be "clever" and worth investigating and I'm encouraged that you two agreed! I'm really intrigued by ...

@AndrewP Right now, this is more in the "hey, this might be fun" stage than any actual plans (I'll need to do things like learn programming FPGAs, for one!), but eventually I think it'd be fun to make this an actual thing (or at least an emulated thing). I actually had some thoughts for an 816 ...