I have a lot of ideas for expansion to make sure there is room for easily exercising your creativity. But I need to narrow things down and get a produceable design ready.

What do you think of these as baseline features that would be included?

• 64 bits of authentic core memory (weave it yourself)
• 64 RGB LEDs (Pimoroni Unicorn Hat)
• 4 hall switches (user configurable)
• Arduino compatible Teensy 3.2 (32-bit NXP Cortex-M4 72 MHz) with all IO accessible
• Magnetic Stylus with narrow and wide field tips
• 4x "AAA" battery pack holder
• Battery Voltage Monitor
• All of the matrix drive lines, the power rails, and the sense outputs will be easily accessible

What do you think of these plans to provide the following header rows/pads for additional expansion?

• Generic I2C OLED
• Generic SPI OLED or Sparkfun Teensy View SPI OLED
• SAO Port, quantity 2
• Adafruit MicroSD breakout board
• Sparkfun QWIIC port
• Ambient Light Sensor
• Proximity Sensor
• Sparkfun LiPo manager
• Generic or Adafruit 3.2" LCD to replace LED Array

What would you consider the must-haves?

Any ideas for nice-to-haves?

If you wouldn't mind providing that feedback through the survey form on my website, I'd appreciate it:

https://core64.machineideas.com