Routines
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53968: Print red cell to current attribute file position (outside play area) and mark as unused in display buffers
Used by the routine at 53887.
Input
IX Address of start of attribute file (22528)
HL' Current position in display buffer 1 (at 61312)
DE' Current position in display buffer 2 (at 63424)
53968 LD (IX+0),18 Set attribute to red INK, red PAPER
53972 EXX Switch registers
53973 LD A,255 Load 255 into current positions in display buffers 1 and 2...
53975 LD (HL),A ...
53976 LD (DE),A ...
This entry point is used by the routine at 53887.
53977 INC HL Advance display buffer 1 pointer by three bytes to next entry...
53978 INC HL ...
53979 INC HL ...
53980 INC DE Advance display buffer 2 pointer by three bytes to next entry...
53981 INC DE ...
53982 INC DE ...
53983 EXX Switch registers
53984 INC IX Advance IX to next byte in attribute file
53986 RET Return
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