v0.0.6

Microcontroller:

• Update microcontroller board setup
• Redesign address decoders (verified on breadboard)
• Consolidate buffer ICs in register file
• Replace ethernet module with pin header for Ethernet featherwing
• Replace address counters with larger ones that are easier/cheaper to assemble
• Reduce BOM:
  • Remove unnecessary level shifter
  • Replace 74LV1T125 (1 buffer IC) with 74LVC2G125 (2 buffer IC) that we
    already used
  • Replace NAND gate with another address decoder
• Stabilize control signals by making sure SEGA_CONTROL and UC_CONTROL can
  never be active at once (one does not depend on the other)
• Change part number for flip-flops to one that JLCPCB stocks

Cart:

• Fix missing ground fill
• Let JLCPCB populate the base pin header
• Switch regulator for SMD version that JLCPCB can populate
• Move components for easier routing, easier access to ammeter header
• Add explanatory text in the silkscreen for each section of the PCB

SRAM:

• Add test pads to SRAM board

Firmware:

• Show async HTTP fetches with the builtin LED
• Improve debugging
• Fix pulse timing

Software:

• Fix reading of 1-bit ports (verified on breadboard)
• Fix initial error flag state

Docs:

• Add missing notes to hardware README