This difference between the DEC COBOL RTL and the VAX COBOL RTL
is documented in the DEC COBOL User Manual appendix on compatibility:
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If your application uses the Digital extensions to the ACCEPT or
DISPLAY statements, DEC COBOL positions the cursor in the upper left
corner of the screen prior to the execution of the first ACCEPT or
DISPLAY statement.
This difference is clearly shown when the first ACCEPT or DISPLAY
statement does not contain the LINE and COLUMN clauses. In this case
DEC COBOL moves the cursor to the top of the screen to perform the
ACCEPT or DISPLAY, whereas VAX COBOL does not move the cursor.
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