Routines
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790D: Display a cutscene
Used by the routine at 7AB6. Displays a cutscene, and then enters demo mode or resumes the game in the next mode.
Input
A Cutscene message number
790D LD ($7FD2),A Store the cutscene message number at 7FD2 so that it can be monitored
7910 CALL $6EC5 Add the message to the message queue
7913 XOR A A=0
7914 LD ($7FC9),A Set Sam's disguise ID (stored at 7FC9) to 0 (none)
7917 LD ($7F9A),A Disconnect any phone call Sam may be making by setting 7F9A to 0
791A LD ($7FFC),A Clear all of Sam's status flags at 7FFC
791D CALL $F969 Update Sam's sprite and the disguise icon now that Sam's wearing no disguise
The loop that follows makes Sam pace up and down until the cutscene is over.
7920 LD HL,$E609 Reset the midstride/mid-action timer in byte 0x09 of Sam's buffer
7923 XOR A
7924 LD (HL),A
7925 LD L,A L=0x00
7926 BIT 0,(HL) Is Sam midstride?
7928 JR Z,$7952 Jump if not
792A CALL $E9C8 Update the SRB for Sam's current animatory state and location
792D DEC E Set E to Sam's next x-coordinate (immediately in front of him)
792E BIT 7,A
7930 JR Z,$7934
7932 INC E
7933 INC E
7934 INC A Set A to Sam's new animatory state
7935 AND $FB
7937 CALL $E9D5 Update Sam's animatory state and location and update the SRB
793A CALL $EC69 Make a walking sound effect
793D CALL $EA80 Update the display
7940 CALL $6EF4 Update the message line
7943 LD HL,$7FC8 7FC8 holds the value of the LSB of the system variable FRAMES as it was at the end of the last pass through the main loop (or this routine)
7946 LD A,($5C78) Wait about 240ms
7949 SUB (HL)
794A CP $0C
794C JR C,$7946
794E ADD A,(HL) Store the current value of the LSB of the system variable FRAMES at 7FC8 for comparison next time
794F LD (HL),A
7950 JR $7920 Jump back to the beginning of this loop
Sam is not midstride at the moment.
7952 CALL $73E4 Show or hide the fuse, door, light bulb or phone in the icon panel
7955 CALL $78FC Has the entire cutscene message been displayed yet?
7958 JP NZ,$F0BE Jump if so to end the cutscene
The cutscene is not over yet. Check whether Sam should turn round before pacing up or down again.
795B LD HL,$E601 Point HL at byte 0x01 of Sam's buffer
795E LD A,(HL) A=Sam's x-coordinate
795F DEC L L=0x00
7960 AND $07 Is Sam's x-coordinate exactly divisible by 8?
7962 JR NZ,$796F Jump if not
7964 BIT 7,(HL) Is Sam facing right?
7966 JR NZ,$7977 Jump if so
7968 CALL $E9C8 Update the SRB for Sam's current animatory state and location
796B XOR $80 Flip bit 7 of Sam's animatory state, thus turning him round
796D JR $7937 Jump back to update Sam's animatory state and the SRB
796F CP $05 Is Sam's x-coordinate congruent to 5 mod 8?
7971 JR NZ,$7977 Jump if not
7973 BIT 7,(HL) Is Sam facing right?
7975 JR NZ,$7968 Jump back to turn Sam round if so
7977 CALL $E9C8 Update the SRB for Sam's current animatory state and location
797A JR $7934
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