The display is a 1,5" 128x128 OLED with a 4 bit greyscale and a maximum refresh rate of 120 fps(or at least that's what i remember the datasheet from the panel manufacturer said something about 105 fps, i think the 120fps are from the controller manufacturer though the 105fps might just be the default).
The external flash memory of the esp goes on a cartridge. the cartridge also has an unused spi bus/jtag interface, the spi bus also used by the screen and 3 gpio pins.
The standard cartridge has a second larger flash chip in addition to the bootable attached to the display spi bus and a gpio pin for chip select which i intend to use mostly to store sounds and music.
The music is being played over a WM8524 i2s dac and amplified by a CMOY amplifyer circut powered by a high frequency +-15v boost converter/inverter.
the controls consist of a low profile joystick(no part number the adafriut/aliexpress one for though-hole mounting) and 5 buttons.
the headphonjack can also output composite video.
the console has an integrated usb serial converter for on the go development.
the battery is user replaceable with a screwdriver and the console uses np-bx1 sony camera batteries for long availability.