Krakout: Draw the playfield border

95E0: Draw the playfield border

Composes the static playfield border into the tile map and their attribute cells. It draws top and bottom strips, four corners, and one side wall on the edge opposite the bat.
draw_playfield_border	95E0	LD HL,TILEMAP_BASE+$42	Top edge: 28×2-cell strip at tile-map rows 2–3, col 2
	95E3	CALL draw_wide_strip	Top edge: 28×2-cell strip at tile-map rows 2–3, col 2
	95E6	LD HL,TILEMAP_BASE+$2C2	Bottom edge: 28×2-cell strip at rows 22–23, col 2
	95E9	CALL draw_wide_strip	Bottom edge: 28×2-cell strip at rows 22–23, col 2
	95EC	CALL draw_side_wall	Side wall: 18×2 cells down rows 4–21, on the side opposite the bat. The bat side picks col 0 or col 30.
	95EF	LD HL,TILEMAP_BASE+$40	Top-left corner (2×2) at row 2, col 0
	95F2	LD DE,corner_tl
	95F5	CALL draw_corner_block
	95F8	LD HL,TILEMAP_BASE+$2C0	Bottom-left corner at row 22, col 0
	95FB	LD DE,corner_bl
	95FE	CALL draw_corner_block
	9601	LD HL,TILEMAP_BASE+$5E	Top-right corner at row 2, col 30
	9604	LD DE,corner_tr
	9607	CALL draw_corner_block
	960A	LD HL,TILEMAP_BASE+$2DE	Bottom-right corner at row 22, col 30. The code falls through into the corner-block routine, which draws it.
	960D	LD DE,corner_br

Routines