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The Retron 2 - How it works

Originally Written May 5, 2019

The Retron 2 is a 2-in-1 console from Hyperkin that can play both NES and SNES Games. I was always interested in what the insides of this console looked like so I tore it apart!


The NES

The NES portion of the Retron 2 is very very boring as it is just a simple NoAC (Nintendo on a Chip) and the passthrough to the video out and DC input.


The SNES

This part gets interesting as it's actually got chips! And not just a single glob top chip. However, These are cheap chips.


As you can see there are a few chips, So I will start with the main 3

TCT-975: The TCT-975 is a clone of the SPC700, From my experience using the Retron 2 it isn't a bad clone of the chip.

TCT-976: This chip is interesting because it should be 2 chips as this is both of the PPUs (5C77-01 PPU1 and 5C78-03 PPU2) crammed into a single chip

TCT-978: This is a clone of the SNES's main CPU, The Ricoh 5A22. Not much can be said as the 5A22 is just a variant of the WDC 65C816.


So what about the other chips? Well, Let's take a look!

Renesas 71V256: Low Power 3.3V CMOS 256K SRAM - Datasheet

Samsung KA2198BD: RGB Encoder for PAL/NTSC - Datasheet

Cypress CY62128VLL-70ZAI: 128K x 8 Super Low Power 3.3V SRAM -Datasheet