In SX Microcontrollers, SX/B Compiler and SX-Key Tool, tdg8934 wrote:

Bean,

Thanks for the updated program. I went back and checked all my connections and they look good. 

1. I still require a 20 MHz resonator on the PDB for the video to be displayed. It does NOT work for me with only the SX-Key' oscillator (which mine is fairly new). 

a. SX-KEY and no on board resonator - No Video displayed.

b. SX-Key and a 20 MHz on board resonator - Video displayed.

c. No SX-Key and a 20 MHz on board resonator - Video displayed.

c. No SX-Key and no on board resonator - No Video displayed.

Programs do take a little long to download that I am accounting for the 1K+ of program(s) to download. 

2. When using a 20 MHz resonator for video display to work, the Sketch program allows the Joystick 1 up/down/left/right buttons to move a flashing small square around the screen. I did not see any effect when pressing the Joystick 1 "fire" button to draw or erase (I used a separate {non PDB pushbutton} between RA.2 and ground). All I get is a moving flashing square - no line tracing or line erasing or anything else. I don't know if that is the expected result or not. This happens with the old code and the new code. {{BTW: Was the new code you mentioned only the MMVGD program or all the programs - Drive, Pong, etc.}}

3. When using a 20 MHz resonator for video display to work, no other programs (old or new) show any signs of Joystick 1 or 2 up/down/left/right button or "fire" button action - no movement just video displayed.  

4. Check your comments in your programs as some of them may not show the correct version number of SX/B (not 1.51) such as 1.43, etc.

Anything else I should look at. It is pretty straight forward in the connections. X9 connections 7..0 to the appropriate SX-28 pins. I have also tried (2) SX-28 IC's. I used a separate individual pushbutton (radio shack) from ground to RA.2 for the fire button. I have no fire button for Joystick 2 - but this should not matter. I know the video connections are correct going to the SX-28 otherwise I would not have any video (when using a resonator). Other than that there are not any connections left to check. 

What else should I look at next? 

Thanks.

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