Routines
Prev: E909 Up: Map Next: E93F
E916: Launch the blimp having got the plans
Used by the routine at E644.
E916 LD DE,$4000 Point DE to the start of screen.
E919 LD B,$08 8 8x8 blocks to update.
E91B PUSH BC Remember BC and DE.
E91C PUSH DE
E91D LD B,$07 7 rows to update.
E91F LD L,E Copy DE to HL.
E920 LD H,D
E921 INC H Move down a row.
E922 PUSH HL Remember HL and BC.
E923 PUSH BC
E924 LD BC,$0020 Copy a line from HL to a row above in DE.
E927 LDIR
E929 EX DE,HL Swap DE and HL.
E92A POP BC Restore BC.
E92B POP DE Restore HL into DE.
E92C DJNZ $E91F Loop back while there are more rows to update.
E92E POP HL Restore HL and BC.
E92F POP BC
E930 DEC B Reduce the number of blocks to update by 1, and return if it is zero.
E931 RET Z
E932 PUSH BC Remember BC.
E933 LD BC,$0020 Move down a 8x8 block.
E936 ADD HL,BC
E937 PUSH HL Remember HL.
E938 LDIR Do the copy.
E93A POP DE Restore HL as DE.
E93B POP BC Restore BC.
E93C JR $E91B Loop back to update more.
E93E RET This is never executed, the function executes at E931.
Prev: E909 Up: Map Next: E93F