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59010: Colourise Home
Used by the routines at 54098, Handler_HomeArrow and Controls_CheckRight.
Input
A The attribute value to write
ColouriseHome 59010 LD HL,22561 HL=22561 (attribute buffer location).
59013 LD B,2 Set a counter in B for 2 rows.
ColouriseHome_Loop 59015 PUSH BC Stash the row counter on the stack.
59016 LD B,3 Set a counter in B for 3 character blocks.
Home_WriteAttribute 59018 LD (HL),A Write the value stored in A to the address held by the attribute buffer pointer.
59019 INC HL Increment the attribute buffer pointer by one.
59020 DJNZ Home_WriteAttribute Decrease the character block counter by one and loop back to Home_WriteAttribute until all three byte values have been written.
59022 LD HL,22593 HL=22593 (attribute buffer location).
59025 POP BC Restore the row counter from the stack.
59026 DJNZ ColouriseHome_Loop Decrease the row counter by one and loop back to ColouriseHome_Loop until all the rows have been updated.
59028 RET Return.
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