If the RK3128 supported pulling this off, it'd be a lot more fitting for a 2600 emulator console to just use the 8K SRAM, an 8Mb (megabit) SPI ROM, and then direct-mapping the 256K L2 as SRAM. Then have the display output scaled from a 320x200 buffer held in that SRAM.
Basically that'd turn it into a really big RP2040 ;)
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If the RK3128 supported pulling this off, it'd be a lot more fitting for a 2600 emulator console to just use the 8K SRAM, an 8Mb (megabit) SPI ROM, and then direct-mapping the 256K L2 as SRAM. Then have the display output scaled from a 320x200 buffer held in that SRAM.
Basically that'd turn it into a really big RP2040 ;)