So, the examples I’ve found for using LCD displays are using a second Arduino as a slave display, or using the main pins on it either way.

Problem is I can only seem to find the more common type of LCD display now - ones whose main inputs have been replaced with an i2c connection.

Is that something which is likely to be supported in future? Was hoping to use a 20x4 LCD panel for my annunciator details rig.
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All character LCD on market are provided with 6800 4/8-bit Parallel  interface - it's standard.

Additional I2C "adapter" can be added by some sellers as separate board or soldered to the LCD (you can de-solder it).

In SimVIm we don't use I2C interface, only parallel as standard. It's faster, it's reliable, especially for multiple  LCD and long wires.

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