Routines
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1F50: display_error: Display error message and jump into page decode loop.
Used by the routines at OELRoutine07, parity_error, illegal_type, missing_operand, datatype_and_hardware and illegal_command.
display_error 1F50 CALL copy_to_header copy string in HL to page header
1F53 CALL pause_3s pause for 3 seconds
1F56 LD HL,($5CB2) reset stack below RAMTOP
1F59 DEC HL
1F5A LD SP,HL
1F5B XOR A set disable_rolling_headers to zero and clear ignore_packets_flag
1F5C LD (disable_rolling_headers),A
1F5F LD (ignore_packets_flag),A
1F62 OUT ($FE),A set the border colour to black, and EAR and MIC bits low
1F64 JP wait_and_decode_page jump to wait_and_decode_page
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