Board Revisions
Rev. 2.0 (2020-08-??)
- Added support for 24 pin PALs
- Use shift registers for input
- Added LEDs to indicate activity on a socket

Rev. 1.1 (2020-08-15)
- Fixed the ugly silkscreen from rev.1
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Rev. 1 (2020-??-??)
First produced version of the board, recognizable by a "rev.1" on the bottom right corner.
- Supports 20 pin PAL devices
- RS232 interfacing

Rev. 0 (2019-??-??)
First design, was never produced. Had some ICs too near to actually fit.