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baldengineer / Mega-IIe

Using the Mega II from a IIgs to make a Apple IIe compatible computer: The Mega IIe!
https://github.com/baldengineer/Golden-Delicious
MIT License
29 stars 4 forks source link

rev 2 RP2040: TXB0108 is active high #23

Closed baldengineer closed 2 years ago

baldengineer commented 2 years ago

The left shifter for control signals is active high on OE. There is a pull-up resistor on-board. (Can still be controlled by TXen pin/GPIO 25).

baldengineer commented 2 years ago

Rev 2 of the KBD2040 board fixes this issue.