https://gitlab.synchro.net/main/sbbs/-/commit/dc7a1772724dceba49502355
Modified Files:
src/conio/bitmap_con.c
Log Message:
Clear "gap rows" when pixel scrolling

Previously, when EGA 43-row modes scrolled, the top line was partially
copied to the bottom of the screen and never cleared.

This was part of the optimization that made the screen buffer into
a ring buffer instead of linear.

Fixes ticket 228.
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https://gitlab.synchro.net/main/sbbs/-/commit/01b5228eeb0dc363b8e4155e
Modified Files:
src/conio/bitmap_con.c
Log Message:
When forcing a font, add a default

It's forced, force it.
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https://gitlab.synchro.net/main/sbbs/-/commit/5fdfaf77ce0e2771206ade48
Modified Files:
src/conio/bitmap_con.c
Log Message:
Always force cursor when setting it.

Previously disabling the cursor didn't force it, so it would stay
on the screen in the last state until the frame changed.
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https://gitlab.synchro.net/main/sbbs/-/commit/23de7cfc44f887bde6f3b999
Modified Files:
src/conio/bitmap_con.c
Log Message:
Ensure fonts are loaded before screens are allocated.

Should make the assertion at bitmap_con.c:659 even more impossible
than it already is.
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https://gitlab.synchro.net/main/sbbs/-/commit/e0866a9f75121405ad7c5332
Modified Files:
src/conio/bitmap_con.c
Log Message:
Don't FREE_AND_NULL() font[0]

This is the last-ditch fallback, so if bitmap_loadfont_locked()
fails, it should stay available.
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https://gitlab.synchro.net/main/sbbs/-/commit/77734fae7989a2779f854123
Modified Files:
src/conio/bitmap_con.c
Log Message:
Protect the hell out of font[0]

We REALLY want it to always be valid.
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https://gitlab.synchro.net/main/sbbs/-/commit/8a3ca35ac316370dc567e51a
Modified Files:
src/conio/bitmap_con.c
Log Message:
Even MORE font[0] paranoia on failure...

Try as hard as possible to get an allocated copy of CP437 into there.
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https://gitlab.synchro.net/main/sbbs/-/commit/dda0e61a855b882023ec8fe4
Modified Files:
src/conio/bitmap_con.c
Log Message:
Also reset current_font[] on error
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https://gitlab.synchro.net/main/sbbs/-/commit/fcb3c9669f8d83c15e5c5e08
Modified Files:
src/conio/bitmap_con.c
Log Message:
If a cells hyperlink id has change from or to zero, redraw

Spaces weren't getting redrawn with the link underscore thing.
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https://gitlab.synchro.net/main/sbbs/-/commit/b2fe4d3bbf7441aa3584bd1b
Modified Files:
src/conio/bitmap_con.c
Log Message:
SyncTERM: redraw Prestel double-height bottom on top-row content change

When a Prestel double-height "top" row is overwritten with new content
without the DOUBLE_HEIGHT bit toggling (e.g., a frame swap from
"Welcome" to "Sign In"), the bottom row's own vmem cells stay
unchanged. The per-cell diff in update_from_vmem then skipped the
bottom row, leaving it showing the bottom-half pixels of the previous
top row's glyph.

Fix at the write site in bitmap_vmem_puttext_locked: when a cell with
the DH bit set has its content actually changed, mark the
bitmap_drawn entry one row below dirty (CIOLIB_BG_DIRTY) so the next
update redraws it. May over-invalidate one row when the cell turns
out to be a Prestel bottom rather than a top, but the dirty flag does
not propagate further.

Fixes ticket 243.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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