X"A7" function 18

Syntax:

call X"A7" using function-code
                 parameter

Parameters:

	Using call prototype (see Key)	Picture
`function-code`	cblt-x1-compx	pic x comp-x.
`parameter`	cblt-x1-compx	pic x comp-x.

On Entry:

function-code

Value 18

parameter

Action to perform:

0	Disable DOS-style console I/O
1	Enable DOS-style console I/O

On Exit:

None

Comments:

Normally the run-time system uses the BIOS to read the keyboard, and writes direct to the video map for all displays. This routine makes the run-time system use operating system functions instead. This means the operator can use the operating system facilities for re-directing keyboard input and screen output.