What CPU and PPU revision are these?

[Alex_the_Brave90]

Since i know nothing about NES chip revisions, I'm curious to know which ones these are. I want to get a general idea of when my NES was manufactured.

[Quietust]

Those are both revision G, which is the most common (aside from revision H in toploaders).

[Alex_the_Brave90]

Ah, nice, thanks!

[Memblers]

The RAM and CIC chips have date codes of 8802 and 8803, I like how the 2 RAM chips are different weeks, heh. That'd be the 2nd and 3rd week of 1988. That won't tell us when the NES itself was manufactured, though it'd be a safe bet to say it's within that same year.

[Fiskbit]

Those are both revision G, which is the most common (aside from revision H in toploaders).

I think H is actually pretty rare in NES toploaders; the vast majority of these seem to use G chips. In contrast, H is very common in AV Famicoms.

I found this thread showing annual shipment data for Nintendo's consoles. Manufacturing of the NES-101 was pretty brief, and it looks like most of them were probably manufactured before the introduction of revision H sometime in late 1993. The AV Famicom had a much longer tail, and based on this and serial number data, I expect H chips in at least 80% of them.

Since i know nothing about NES chip revisions, I'm curious to know which ones these are. I want to get a general idea of when my NES was manufactured.

Your PPU is from 1987 December week 2, and your CPU from 1988 January week 2. The first digit of the date code is the last digit of the year, the second digit is the month (A-M excluding I), and the third digit is the week. If the week uses a number, it's from the 1980's; if it uses a letter, it's from the 1990's or 2000's.

[Alex_the_Brave90]

Those are both revision G, which is the most common (aside from revision H in toploaders).

I think H is actually pretty rare in NES toploaders; the vast majority of these seem to use G chips. In contrast, H is very common in AV Famicoms.

I found this thread showing annual shipment data for Nintendo's consoles. Manufacturing of the NES-101 was pretty brief, and it looks like most of them were probably manufactured before the introduction of revision H sometime in late 1993. The AV Famicom had a much longer tail, and based on this and serial number data, I expect H chips in at least 80% of them.

Since i know nothing about NES chip revisions, I'm curious to know which ones these are. I want to get a general idea of when my NES was manufactured.

Your PPU is from 1987 December week 2, and your CPU from 1988 January week 2. The first digit of the date code is the last digit of the year, the second digit is the month (A-M excluding I), and the third digit is the week. If the week uses a number, it's from the 1980's; if it uses a letter, it's from the 1990's or 2000's.

Ah, thanks. Very cool you can figure that out by the serial numbers. Many of my retro consoles are early machines. I would love to have an NES from 1985 just because lol

I have an Atari 7800 from 1984 that was one of the units that were stuck in the warehouse for 2 years before it was finally launched in 86. The Serial numbers on 7800 consoles are pretty straight forward and easy to decipher if you take a minute to look them up (numbers beginning with AT84 are the original 7800 consoles from 1984). The SNES seems to be super easy and straight forward to figure out when it was made, just by looking at the serial number, i could pinpoint when each SNES console was made, and which one I wanted to buy off ebay (early to mid 1992), I wanted one that was as early as possible, but didn't suffer from the dreaded bad chips that the launch consoles had, but most SNES consoles seem to suffer from chips going bad.