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| author | user <user@clank> | 2026-07-16 16:46:21 +0200 |
|---|---|---|
| committer | user <user@clank> | 2026-07-16 16:46:21 +0200 |
| commit | 0db949c3a3ab07b264c21c3a15efea6b6055be0d (patch) | |
| tree | 2d6cdae9ee9983d53838d29a6d7041d26cfab58c /include/gbos.inc | |
| parent | term/osk: view-offset scroll region (lossless backlog on OSK toggle) (diff) | |
| download | gbos-0db949c3a3ab07b264c21c3a15efea6b6055be0d.tar.gz gbos-0db949c3a3ab07b264c21c3a15efea6b6055be0d.tar.xz gbos-0db949c3a3ab07b264c21c3a15efea6b6055be0d.zip | |
term: compute the OSK view offset from the cursor row (keep input visible)
A fixed offset of OSK_ROWS pushed the cursor off the top of the screen when
there was little backlog (e.g. a fresh terminal: cursor at logical row 0 ->
screen row -3, hidden). Now the offset is max(0, wCurRow - 14): 0 when the
cursor is within the visible area, growing only enough to keep the cursor
line at the bottom visible row (14) once the terminal has filled past it.
compute_offset (from wOskVisible + wCurRow) runs at the top of
term_write_tilemap; cursor_down re-runs the tilemap when the cursor changes
rows while the OSK is up; osk_toggle just re-runs it. Shared OSK_DOCK
constant in gbos.inc keeps term.asm and osk.asm in sync.
Verified: fresh terminal + OSK shows the input at row 0; filling past row 14
shifts the view to hold the input at row 14; full screen + OSK puts it at
row 14; toggle on+off is still lossless.
Diffstat (limited to 'include/gbos.inc')
| -rw-r--r-- | include/gbos.inc | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/gbos.inc b/include/gbos.inc index 6dcefce..9b44b33 100644 --- a/include/gbos.inc +++ b/include/gbos.inc @@ -12,6 +12,7 @@ DEF rIF EQU $FF0F ; interrupt flags DEF rIE EQU $FFFF ; interrupt enable DEF rSVBK EQU $FF70 ; CGB WRAM bank select ($D000-$DFFF): 1..7 DEF wCurMask EQU $D589 ; term/osk: cursor underline bits OR'd into a tile's last row +DEF OSK_DOCK EQU 3 ; on-screen keyboard height in rows (dock at the bottom) DEF rKEY1 EQU $FF4D ; CGB speed switch DEF rSB EQU $FF01 ; serial data DEF rSC EQU $FF02 ; serial control |