- 4.37.2.110. -
Table of Contents
4. Standard Units
4.37. Graph - Graph unit
4.37.2. Graph Unit Procedures and Functions
4.37.2.110. SetScreenStart procedure
4.37.2.110. SetScreenStart procedure
Targets: MS-DOS only
Graph Unit
Sets the CRTC display starting
address to the specified value.
Declaration:
procedure SetScreenStart(X,Y: DWORD; WaitForRetrace: Boolean);
Remarks:
You can use this procedure to implement hardware scrolling.
You can also use this function to perform double buffering.
Keep in mind, that your video card may not support
extended CRTC addressing!
If the WaitForRetrace flag is False, the routine will not wait
for a vertical retrace before programming the CRTC starting address.
Otherwise the routine will sync to a vertical retrace.
Under VBE 1.2 it is not guaranteed what the behavior will be
(some wait and some don't).
- 4.37.2.110. -
