AUX Port

[Neurox66]

Hi,
I've a CPC 6128 Plus and I should read the AUX port (the one with the RJ-11 cable for the light pen) what addresses should I read with INP() ?

Thanks 

[GUNHED]

Read the signal from the CRTC, like any other light pen.

[McArti0]

Frame:out &bcff,17 : L%=inp(&bfff):frame:out&bcff,16:H%=inp(&bfff)

[Neurox66]

Thank you for replies.
I actually don't want to use the port to connect a pen or gun but use it to receive data.
I'll try 

[andycadley]

I think, at that point, you just have a rubbish version of the joystick port with only a fire signal. I'm not sure the CRTC position could be usefully used really.

[Neurox66]

Not the position of the CRTC but the keys pressed. 
Basically by simulating key presses I can construct a kind of morse code to pass messages to the CPC 6128Plus 

[andycadley]

But, since you can't really use the LPEN signal, you're just limited to signals you could send via the joystick port.

[Bryce]

Not the position of the CRTC but the keys pressed.
Basically by simulating key presses I can construct a kind of morse code to pass messages to the CPC 6128Plus 

It won't be morse, as the pulses would all have the same length, but you could "bit-bang" some sort of serial data into the CPC.

Bryce.

[dthrone]

Not the position of the CRTC but the keys pressed.
Basically by simulating key presses I can construct a kind of morse code to pass messages to the CPC 6128Plus 

Could send wacky data format to the analogue port?

[GUNHED]

Better use the joystick ports, not fun to fry the ASIC in the 6128plus.