- Remove the COM12 auto-open and its retry timer; the serial link is now
opened manually via an "Open/Close COM12" button in the config panel.
The named-pipe transport still serves automatically. Baud straps reopen
only if already open.
- Decode the three previously-unknown JP1 config jumpers from the firmware
(boot config routine at $9190) and relabel them:
* Jumper 3 (PA3): sets flag $B7.2, driving hardware output PA5 to a
fixed level (a board config line).
* Jumper 4 (PD5): display orientation — installed = horizontal 128x32,
removed = vertical 32x128 (the demo's "HORIZONTAL OR VERTICAL").
* Jumper 5 (PD4): power-on display/pixel test pattern ($B888).
PlasmaNew/README.md's JP1 table now carries the full firmware-backed decode.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>