Routines
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F8B4: Adjust the game mode
 Used by the routines at 6900 (to prepare the shields and safe for a new game), 6DEF (when the last shield has just been flashed or unflashed) and F726 (when ERIC has opened the safe). F8B4 PUSH HL F8B5 LD HL,\$7FEB 7FEB holds the shield counter F8B8 LD (HL),\$0F Restore the shield counter to 15 F8BA DEC L HL=7FEA (game mode indicator) F8BB INC (HL) A=1 if the game has just started, 2 if the 15th shield was just flashed, 3 if the safe was just opened, or 4 if the 15th shield was just unflashed F8BC LD A,(HL) F8BD LD HL,(\$7FC4) HL=score F8C0 CP \$04 Was the 15th shield just unflashed? F8C2 JR NZ,\$F8D8 Jump if not ERIC has just hit the 15th shield and made it unflash. F8C4 LD DE,\$01F4 Add 5000 to the score and print it F8C7 ADD HL,DE F8C8 CALL \$F4F1 F8CB LD HL,\$FEE0 FEE0='WELL DONE! GO UP A YEAR' F8CE CALL \$F9AF Print this in the lesson box F8D1 LD A,\$0C Set the MSB of the lesson clock to 0x0C F8D3 LD (\$7FF8),A F8D6 LD A,\$01 Ensure that the 'DEC A' below sets the zero flag F8D8 DEC A Was the 15th shield just flashed or the safe just opened? F8D9 JR NZ,\$F8E6 Jump if so Either the game has just started, or the 15th shield was just unflashed. F8DB CALL \$F855 Generate a new safe combination code, and a new random birth year for MR CREAK F8DE CALL \$F70A Unflash the safe and all the shields F8E1 CALL \$7E90 Play the theme tune F8E4 POP HL F8E5 RET ERIC has just hit the 15th shield and made it flash (A=1), or just opened the safe (A=2). F8E6 LD DE,\$0064 Add 1000 to the score F8E9 ADD HL,DE F8EA DEC A Was the safe just opened? F8EB JR NZ,\$F8EE Jump if so F8ED ADD HL,DE Add 1000 more to the score if the 15th shield was hit F8EE CALL \$F4F1 Print the new score F8F1 CALL \$7E96 Play the 'Got all the shields' tune F8F4 POP HL F8F5 RET
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