Programming the V9990: Learning by disassembling the "Robot" demo

Learning to program the V9990 VDP

Having a V9990 VDP attached on my CPC and always eager to learn about and program it. First steps are reproducing the "Robot" demo which were spread around the net to show little of the capabilities of the VDP V9990 from Yamaha.

But how does it works?

.... (tbd)

Demo File: For executing extract files on a CPC floppy or upload it on the M4 board and change directory into the DSK container (|CD,"ROBOT.DSK").

Run file "ROBOT.BIN" and wait some time. At least a running robot through a forest will be shown.

You should be able to move (left, right, jump up) the robot via cursor keys and fire a bullet with space.

https://www.cpcwiki.eu/index.php/File:Robot.dsk

(there might be some DSK files around where you can't find the "ROBOT.BIN" file. The DSK container attached is a version made by @Geco. In the case you don't have you can run the demo by executing it by loading / running the files in following 10 steps: 1. run"clear > 2. run"a1 > 3. run"a2 > 4. run"a3 > 5. run"b1 > 6. run"b2 > 7. run"b3 > 8. run"c1 > 9. run"c2 > 10. run"c3 >11. run"robo)