altos/telelco-v3: Create initial flash loader setup
authorKeith Packard <keithp@keithp.com>
Sun, 7 Jan 2024 07:16:23 +0000 (23:16 -0800)
committerKeith Packard <keithp@keithp.com>
Thu, 1 Feb 2024 01:50:19 +0000 (17:50 -0800)
Copied from easymega-v3 with USB pull-up moved to PA9. Note this
assumes the proto boards will have a resistor fitted there, which is
not in the artwork.

Signed-off-by: Keith Packard <keithp@keithp.com>

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