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loader: FB console does leave garbage on screen while scrolling

Description

loader: FB console does leave garbage on screen while scrolling

Scrolling screen will leave "trail" of chars from first column.
Apparently caused by cursor location mismanagement.
Make sure we do not [attempt to] set cursor out of the screen.

(cherry picked from commit e5a50b03297fa09652b3cf319bc6e863392554e0)

Details

Provenance
tsoomeAuthored on Aug 21 2021, 11:25 AM
Parents
rG57cf5a9f0bec: sched_ule(4): Pre-seed sched_random().
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