20240109:

Most connectors are in, and they seem to fit the footprints. The routing in KiCAD is also done and the files are sent for board manufacturing. It didn't seem easy to cram all components into 10x10cm, for the extra cheap production costs. So I settle for just cheap (less than $8 for 5 boards, instead of less than $2). S

These are the features of the new board:

• serial line to PX-4/8: 9-pin Dsub female (compatible with the #724-F9 cable)
• monochrome video: RCA connector
• colour video: DIN-8 with RGB and sync (more or less SCART compatible)
• power: barrel jack 5.5/2.1mm (for external 7.5-9.0 Volt adapter)

Some (blinking) LEDs for power and serial line activity. Push buttons for FILINK mode and RESET. 

When the board is ready a 3D-printed box will be designed (like the Pro Micro version of PFFBDK, https://hackaday.io/project/193978-pfbdk-epsp-floppy-drive-emulator).