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Connector:Analogue joystick (CPC Plus only)

1,332 bytes added, 01:07, 15 June 2018
[[Analog Joysticks| Analogue Joystick ]] Port (15 Pin SUB-D, female) (CPC Plus only)
The Analogue CPC+ Joystick port is somewhat similar to standard PC Joystick ports - with two some important differences:
* 5V and GND are exchanged with each other, and,
* on CPC+ the buttons must be connected to a "select" line (instead of to GND).
* The ADC hardware in the CPC works only with 180kΩ potentiometers (unlike the software counters in PCs, which works with different types, in range 10K...300kΩ, or so)'''Caution''' - there is no resistor in the supply lines - the 5V/GND pins connect directly to the computers '''2.4 Ampere''' power supply - so, there's a good chance that the CPCs reversed polarity will '''destroy''' any electronics (electrolyte capacitors, auto-fire circuits, etc) in connected PC joysticks.  Pin CPC+ PC ________________________ 1 Ground GND (Pot common) +5V(Pot common) | | 2 /Fire 1 Player 1 Fire Fire1 Player1.Fire1 | 8 7 6 5 4 3 2 1| 3 X1 Player 1 X Player1.PotX (lt/rt) \ 15 14 13 12 11 10 9 / 4 /Joystick 1 Stick1 (button common) GND(button common) \____________________/ 5 +5V GND 6 Y1 Player 1 Y Player1.PotY (up/dn) 7 /Fire 2 Player 1 Fire 2Fire2 Player1.Fire2 8 Ground GND (Pot common) +5V (Soundblaster: GND) 9 Ground GND (Pot common) +5V 10 /Fire 1 Player 2 Fire1 Player2.Fire 1 11 X2 Player 2 X Player2.PotX (lt/rt) 12 /Joystick 2 Stick2 (button common) GND (Soundblaster: Midi TxD) 13 Y2 Player 2 Y Player2.PotY (up/dn) 14 /Fire 2 Player 2 Fire2 Player2.Fire 2 15 Ground GND (Pot common) +5V (Soundblaster: Midi RxD) * Two analogue joysticks could be connected by using an Y-cable. The Fire signals are the same as for the normal (digital) joystick port. Joystick 1 buttons should be connected to Pin 2,4,6, and joystick 2 buttons to Pin 10,12,14. Like the digital [[Joystick Y-cables]] the analog Y-cable should have '''diodes''' in the button lines (there are no diodes between pins 7+14 and 2+10 the mainboard).
* The A/D inputs have an input range of 0V (data = 00) to 2.5V (data = 3Fh), and an input impedance of 180k to Vcc.
 
==Softwares using Analog Joystick==
 
*[[Tennis Cup 2 ( Cartridge )]] allows player 2 to use Analog port.
 
==Compatible Models ==
 
*[[Amstrad Analogue Joystick AJ-5]]
*[[Sinclair SPJ-1]]
 
[[Category:Peripherals]][[Category:CPC Internal Components]][[Category:CPC Plus|*]][[Category:Input Device]]
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