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35627: Clear display file below 7th character row (play area)
Used by the routine at 27762.
35627 LD HL,16608 Load HL with display file address corresponding to (0, 7) (characters)...
35630 LD (54110),HL ...and move bitmap virtual text cursor here
35633 LD HL,32 Load HL (width parameter) with 32
35636 LD A,L Load A with 32 (SPACE character code)...
35637 LD (54235),A ...and modify instruction at 54234 with this operand
35640 CALL 54231 Draw 32 SPACE characters across the screen to clear bottom character row of top third of display file, then set HL to zero
35643 LD BC,8 Clear bottom two thirds of display file...
35646 JP 35656 ...
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