Routines
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31188: Check whether ERIC is where he should be
Used by the routines at 31648, 31854, 31895, 31952 and 62208. Returns with the zero flag set if and only if ERIC is where he should be during dinner or class.
31188 CALL 31229 Get ERIC's coordinates in DE
31191 LD A,D A=ERIC's y-coordinate
31192 PUSH HL
31193 LD HL,30608 Point HL at the skool region table for the top floor (see 30636)
31196 CP 155 Is ERIC on the top floor?
31198 JR Z,31214 Jump if so
31200 CP 162 Set the zero flag if ERIC's on the middle floor
31202 LD L,156 HL=30620 (skool region data table for the middle floor; see 30636)
31204 JR Z,31214 Jump if ERIC's on the middle floor
31206 LD L,166 HL=30630 (skool region data table for the bottom floor; see 30636)
31208 CP 169 Is ERIC on the bottom floor?
31210 JR Z,31214 Jump if so
31212 POP HL
31213 RET Return with the zero flag reset
ERIC is on the top, middle or bottom floor (i.e. not on a staircase).
31214 LD A,E A=ERIC's x-coordinate
31215 CP (HL) Find the region identifier (0-7) for ERIC's current location
31216 INC HL
31217 INC HL
31218 JR NC,31215
31220 DEC HL HL now points at the region identifier
31221 LD A,(32756) Pick up the current lesson descriptor from 32756
31224 AND 7 Keep only the room bits (bits 0-2)
31226 CP (HL) Is ERIC where he should be?
31227 POP HL
31228 RET Return with the zero flag set if so
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