Routines
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9A59: Opcode $0F: switch to one of a character's scripts at random
Used by the routine at CHARACTERS_ACT.
A random number, limited by the lesser of the operand and slot byte 1 picks from the start of the character's script table; this is how Gandalf and the others wander without a fixed route. SCRIPT_PICK picks entry E instead, and opcodes with no meaning of their own come in there with E = 0.
SCRIPT_RANDOM 9A59 LD A,(IX+$01) The lesser of the operand and the character's own limit
9A5C CP (IY+$01)
9A5F JR C,SCRIPT_RANDOM_0
9A61 LD A,(IY+$01)
SCRIPT_RANDOM_0 9A64 CALL RANDOM_POSITIVE A random number within it
9A67 LD E,A
This entry point is used by the routine at CHARACTERS_ACT.
SCRIPT_PICK 9A68 LD A,(IY+$01) No further than the character's own limit
9A6B CP E
9A6C JR NC,SCRIPT_RANDOM_1
9A6E LD E,A
SCRIPT_RANDOM_1 9A6F LD L,(IY+$04) The script its table has at that place
9A72 LD H,(IY+$05)
9A75 LD D,$00
9A77 ADD HL,DE
9A78 ADD HL,DE
9A79 ADD HL,DE
9A7A INC HL
9A7B LD E,(HL)
9A7C INC HL
9A7D LD D,(HL)
9A7E LD (IY+$02),E
9A81 LD (IY+$03),D
9A84 RET
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