Routines
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47491: Draw an upper or lower window frame edge then increment the border character index
Used by the routine at 47326.
Input
A (Entry at 47497 only) Previous border edge character index used
HL Width of window edge to draw (characters, minus 1)
47491 CALL 63302 Draw an edge of frame of a window
This entry point is used by the routine at 47326.
47494 LD A,(63306) Load A with window edge border character previously used
This entry point is used by the routine at 47326.
47497 INC A Increase index of window edge border character to use next...
47498 LD (63306),A ...and store at 63306
47501 RET Return
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