Guru
Joined: 05/10/2019
Location: United KingdomPosts: 9057
| Posted: 06:49am 12 Jun 2025 |
Input voltage to the Giga is 6V to 24V but it uses 3V3 logic.
Input to the Pico is 2.7V to 5.6V and it uses 3V3 logic.
Your logic levels are fine but be careful how you power them as both supplies should be switched at the same time. If one is powered before the other then the GPIO ports could potentially be damaged. I would put 1K resistors in series with each of the signal lines for safety.
By default on a standard PicoMite GP8 and GP9 are dedicated to COM2 for connecting a PS2 keyboard. You will have to use OPTION KEYBOARD OFF to allow those pins to be used for anything else.
Appendix A of the PicoMite manual has a lot of information on how to configure and use the COM ports. I can't give further information here because I've no idea how you work with a Giga R1. You are going to have to write some sort of a program for both machines so that they can communicate.