Ok, so this would be more correct?
while (1)
{
// turn everything the same color
COLUP0 = COLUP1 = COLUPF = COLUBK = i++;
// 3 lines vsync
VSYNC |= 0x02;
for (j = 0; j < 3; j++)
WSYNC=1; // wait for sync
VSYNC &= ~0x02;
// 37 lines vertical blank
VBLANK |= 0x02;
for (j = 0; j < 37; j++)
WSYNC=1; // wait for sync
VBLANK &= ~0x02;
// visible screen
for (j = 0; j < 192; j++)
WSYNC=1; // wait for sync
// overscan area
for (j = 0; j < 30; j++)
WSYNC=1; // wait for sync
}
On Wed, 20 Mar 2002, Thomas Jentzsch wrote:
> The typical 2600 NTSC screen consists out of 4 parts:
> 1. vertical sync: 3 lines (or more)
> 2. vertical blank area: 37 lines (that one is missing)
> 3. visisble screen: 192 lines
> 4. overscan: 30 lines
> ----------------------
> total: 262 lines
--
adam@xxxxxxxxxxxxxxxx http://cuddlepuddle.org/~adam/pgp.txt
----------------------------------------------------------------------------------------------
Archives (includes files) at http://www.biglist.com/lists/stella/archives/
Unsub & more at http://www.biglist.com/lists/stella/
