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66C7: Read Command
Used by the routine at GameLoop.
Pages the parser in bank 3 over C000, calls it, then pages bank 0 back so the picture data is visible again.
ReadCommand 66C7 LD A,$03 Call RememberBank using page RAM bank 03 in at C000, keeping the 48K ROM.
66C9 CALL RememberBank
66CC CALL $C000 Call ReadCommand.
66CF PUSH AF Stash AF on the stack.
66D0 XOR A Call RememberBank using page RAM bank 00 in at C000, keeping the 48K ROM.
66D1 CALL RememberBank
66D4 POP AF Restore AF from the stack.
66D5 RET Return.
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