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Check early if TT11P is defined. If not, die piecefully.
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@ -226,6 +226,9 @@ init: setz a,
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name: .close 1, ;close the channel we were loaded on
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move p,[-lpdl,,pdl-1]
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move b,[squoze 0,tt11p]
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.eval b,
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jsr die
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move b,[squoze 0,nf11ty]
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.eval b, ;TTY # of console free display
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.value
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