LittleSixteen is an Open Hardware remake of the Commodore 16, 116 and Plus/4 home computers, featuring many improvements over the original design.

The goal of V4 was to make LittleSixteen an improved Plus/4 clone, rather than a C16 clone.

• 100% Plus/4 compatible User Port.
• 512 kB Hannes-style RAM expansion (which can be reduced to 256 kB through a single jumper for compatibility reasons).
• 2 ROM banks, each of which can carry the whole set of ROMs: KERNAL + BASIC + Function ROMs.
• Onboard SID (either 6581 or 8580 + Optional Digifix) + 3rd joystick port (SID audio is mixed with the TED/Ext audio with configurable volume but direct dedicated output is also available).
• Direct TED audio output connector.
• Joystick swapper.
• Ability to replace keyboard MOS 6529 with 74x273 (so that 6529 can be recycled for User Port, but that one as well can be replaced with a 74x654).
• Removed FB13 in order to reduce luma/chroma crosstalk and improve video quality.
• Pin header with all tape signals (think Internal Tapuino).
• Pin header with all IEC signals (think Internal SD2IEC).

This goes on top of all the fixes and improvements that were already available in V3 and previous versions.

For more information, please visit the GitHub project page.