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079A: print_double_column_3: Write 4 pixel rows of double height character data over 8 pixel rows at column that is 3 greater than a multiple of 4.
Used by the routine at print_half_row.
Input
DE holds address of pixel row n of character font bitmap.
HL holds screen address to print character at.
print_double_column_3 079A CALL print_column_3 Call print_column_3 with B set to 1 to print pixel row n+0 of character.
079D DEC DE Decrement DE and call print_column_3 with B set to 2 to print pixel rows n+0 and n+1 of character.
079E LD B,$02
07A0 CALL print_column_3
07A3 DEC DE Decrement DE and call print_column_3 with B set to 2 to print pixel rows n+1 and n+2 of character.
07A4 LD B,$02
07A6 CALL print_column_3
07A9 DEC DE Decrement DE and call print_column_3 with B set to 2 to print pixel rows n+2 and n+3 of character.
07AA LD B,$02
07AC CALL print_column_3
07AF DEC DE Decrement DE and jump to print_column_3 with B set to 1 to print pixel row n+3 of character.
07B0 INC B
07B1 JP print_column_3
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