Routines
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28576: 'A' pressed - down
 The address of this routine is found in the table of keypress handling routines at 58704. It is called from the main loop at 63210 when 'A' or '6' is pressed. 28576 CALL 28240 Check whether ERIC is on a staircase 28579 LD L,0 Point HL at byte 0 of ERIC's buffer 28581 JR C,28650 Jump if ERIC's on a staircase 28583 BIT 7,(HL) Check the 'direction' bit of ERIC's animatory state 28585 LD A,D A=ERIC's y-coordinate 28586 JR Z,28625 Jump if ERIC is facing left 28588 CP 3 Is ERIC on the top floor? 28590 JR Z,28616 Jump if so 28592 CP 10 Is ERIC on the middle floor? 28594 JR Z,28611 Jump if so 28596 CP 14 Is ERIC on the assembly hall stage? 28598 JP NZ,28449 Move ERIC one space to the right if not 28601 LD A,E A=ERIC's x-coordinate 28602 CP 80 This is the x-coordinate of the top of the stairs leading from the stage to the bottom floor 28604 JR NZ,28598 Jump if ERIC is not here This entry point is used by the routines at 28315, 28436 and 28460. 28606 LD B,D B=ERIC's post-midstride y-coordinate (down a stair) 28607 INC B 28608 JP 28516 Move ERIC one space right or left too ERIC is on the middle floor, facing right. 28611 LD A,E A=ERIC's x-coordinate 28612 CP 15 This is the x-coordinate of the top of the stairs leading down to the bottom floor at the far left of the boy's skool 28614 JR 28604 Move ERIC down a stair if he's here ERIC is on the top floor, facing right. 28616 LD A,E A=ERIC's x-coordinate 28617 CP 84 This is the x-coordinate of the top of the stairs just outside the head's study 28619 JR Z,28606 Move ERIC down a stair if he's here 28621 CP 179 This is the x-coordinate of the top of the stairs leading down to the middle floor in the girls' skool 28623 JR 28604 Move ERIC down a stair if he's here ERIC is facing left. 28625 CP 10 Is ERIC on the middle floor? 28627 JR Z,28641 Jump if so 28629 CP 3 Is ERIC on the top floor? 28631 JP NZ,28473 Move ERIC one space left if not 28634 LD A,E A=ERIC's x-coordinate 28635 CP 26 This is the x-coordinate of the top of the stairs leading down from the Revision Library 28637 JR NZ,28631 Move ERIC one space left if he's not here 28639 JR 28606 Otherwise move him down a stair ERIC is on the middle floor, facing left. 28641 LD A,E A=ERIC's x-coordinate 28642 CP 85 This is the x-coordinate of the top of the stairs leading down to the stage 28644 JR Z,28606 Move ERIC down a stair if he's here 28646 CP 183 This is the x-coordinate of the top of the stairs leading down to the bottom floor in the girls' skool 28648 JR 28637 Move ERIC down a stair if he's here ERIC is on a staircase. 28650 XOR (HL) Reset the carry flag if ERIC is facing the wrong way to descend the stairs 28651 RLA 28652 JP NC,28216 Turn ERIC round if he's facing the wrong way 28655 JR 28606 Otherwise move him down a stair
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