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Routines |
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Called from the main loop at 26471 when bit 5 of ERIC's status flags at 32763 is set (by the routine at 63056).
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63146 | CP 13 | Was ENTER pressed? | ||||
63148 | JR Z,63188 | Jump if so | ||||
63150 | LD B,A | Store the keypress code in B | ||||
63151 | LD H,172 | 172=ERIC | ||||
63153 | CALL 28968 | C=171 (Reading Room blackboard), 177 (White Room blackboard) or 183 (Exam Room blackboard) | ||||
63156 | SUB 179 | |||||
63158 | LD C,A | |||||
63159 | ADD A,A | |||||
63160 | ADD A,C | |||||
63161 | LD C,A | |||||
63162 | LD L,A | Point HL at byte 3 of the relevant blackboard contents buffer) | ||||
63163 | LD H,127 | |||||
63165 | BIT 7,(HL) | Jump if 4 or more characters have been written so far, or the board was dirty before ERIC started writing | ||||
63167 | JR Z,63178 | |||||
63169 | SUB 4 | Point HL at the byte preceding the first byte of the relevant blackboard contents buffer | ||||
63171 | LD L,A | |||||
63172 | INC L | Find the next 'open' slot (which will have bit 7 set) in the blackboard contents buffer | ||||
63173 | BIT 7,(HL) | |||||
63175 | JR Z,63172 | |||||
63177 | LD (HL),B | Store the keypress code in the blackboard contents buffer | ||||
63178 | INC C | Restore the keypress code to A; set BC=32684 (Reading Room blackboard), 32690 (White Room blackboard), or 32696 (Exam Room blackboard) (which holds the pixel coordinates at which ERIC should write) | ||||
63179 | LD A,B | |||||
63180 | LD B,127 | |||||
63182 | CALL 29023 | Write a single character on the blackboard | ||||
63185 | JP 63123 | Move ERIC's arm | ||||
ERIC has finished writing on the board (ENTER was pressed).
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63188 | RES 5,(HL) | Reset bit 5 of ERIC's status flags at 32763 to indicate that ERIC has finished writing on the board | ||||
63190 | RET | Return to the main loop |
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