A little HELP!!

[Demon]

Code: is inserted by the system.

[ Code ] at start.
[ / Code ] at end.

without spaces

[Ramius]

Thank you! I forgot the brackets! Boy do I feel dumb! Back to the code, so I did a hex to binary and binary to hex and came up with $1FC5 should be $1085 and $1FD4 should be $1284. It did not make a change so it must be something else or I did not convert correctly?

[HenrikOlsson]

No, that doesn't look correct to me.
$1FC5 = 0001 1111 1100 0101
$1085 = 0001 0000 1000 0101

That's a lot more changes than one bit.

/Henrik.

[Ramius]

I probably tried to do too much at one time such as turn off the blinking, set it to mixed mode, etc.

[Ramius]

Okay so I did just the one bit change making it $1EC5. It helped. the $1FD4 I made $1ED4. Some how the video with text is being placed below the sync level! I can see sync, burst, and the video appears to be below the sync pulse! The sync pulse should be a negative .3 volts while video is positive .7 volts. Maybe I have a bad chip? There is also a "Mode Register" and I thought it had a value of $00CC and I think I am looking at the wrong register?

[HenrikOlsson]

Hi Ed,
If you're talking about the line WData = $00CC: GOSUB Send it's a command that makes the address pointer in the chip point at address 12 (which apparently is the Zoom register and makes the pointer increment automatically for each data write following the command. The mode register is at address 16 so, as far as I can see, it is being set to either $183E or $193E depending on which of the two subroutines are being called.

/Henrik.

[Ramius]

Hi Henrik!
Again thank you, thank you, thank you! Some settings do not make any sense to me. $183E for example sets M8 to a low impedance state while $193E sets M8 to a high impedance state. It would seem that M8 should be high impedance at all times. I did try to e-mail the author and the e-mail bounced. The first picture is of the video out. Note the bar at the bottom which is below the sync level and should be at the top. Second picture shows what a TV will display. The third photo shows the input video (color bars). Note nothing is below the sync level.