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controllers [2022/06/11 16:45] – [Commands from the console] admin | controllers [2023/06/04 20:48] – [Commands from the console] pulkomandy | ||
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* Make sure the reply is completely sent ("Tx buffer empty" in status register) | * Make sure the reply is completely sent ("Tx buffer empty" in status register) | ||
* Check that RTS did not become low | * Check that RTS did not become low | ||
- | * Put CTS high again | + | * Put CTS low again |
* Back to idle state | * Back to idle state | ||
The controller keeps RTS down as long as it has more bytes to send. | The controller keeps RTS down as long as it has more bytes to send. | ||
+ | |||
+ | {{:: | ||
===== Messages from the controller ===== | ===== Messages from the controller ===== | ||
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* 0x44: German | * 0x44: German | ||
===== Commands from the console ===== | ===== Commands from the console ===== | ||
- | |||
- | 71 or 70 is sent during boot to start the controller (probably any 7x value will work). | ||
61, 62, 64 and 68 are sent in reply to color buttons presses. I suspect this controls the lights in the buttons. | 61, 62, 64 and 68 are sent in reply to color buttons presses. I suspect this controls the lights in the buttons. | ||
60 is sent to turn the light off. | 60 is sent to turn the light off. | ||
- | These are repeated every 20ms. After the controller sends 55 (idle), the V.Smile | + | These are repeated every 20ms. After the controller sends 55 (idle), the game also returns to its idle reply (E6 followed by D6 for example) every 20ms. |
+ | |||
+ | |||
+ | ====== Checksum/ | ||
+ | |||
+ | The console sends 7x commands (where x is a " | ||
+ | |||
+ | The controller response algorithm to compute the correct reply is: | ||
+ | |||
+ | '' | ||
+ | |||
+ | where A and B are the two most recent nibbles sent by the console in 7x commands. | ||
+ | |||
+ | The console must send the 7x commands, even if it ignores all the Bx replies from the controller. Without these commands, the controller eventually shuts down. | ||