Routines
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24342: Character Row Address
Used by the routines at HomeRow, ScrollWindow and ClearLowerRows.
Turns a character row in A into the display address of that row.
Output
DE Display address of character row A.
RowAddress 24342 LD L,A Double the row number.
24343 LD H,0
24345 ADD HL,HL
24346 LD DE,23504 Add the screen-row table at ScreenRows.
24349 ADD HL,DE
24350 JP 10992 Enter DE (DE+1) at 10992 to load the row address into DE.
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