Functions
PPI If a port is defined as then it s output s will be at high impedance A device connected to a port of the will see &FF on the port outputs This can be tested with the following CPC and KC compact systems To understand it s full functions please read the datasheet In these systems it is connected to the AY Programmable Sound	Generator (PSG)

PPI If a port is defined as then it s output s will be at high impedance A device connected to a port of the will see &FF on the port outputs This can be tested with the following CPC and KC compact systems To understand it s full functions please read the datasheet In these systems it is connected to the AY Programmable Sound cassette the VSYNC of the CRTC and the busy signal from the parallel port The PPI is selected when bit of the I O port address is set bits and then define the PPI function access as shown the is integrated into the ASIC The emulation is not complete and some functionality is not available Please see the Extra CPC documentation for more information	Mode (Strobed Input/Output) and Mode 2(Bi-Directional Bus)

PPI If a port is defined as then it s output s will be at high impedance A device connected to a port of the will see &FF on the port outputs This can be tested with the following CPC and KC compact systems To understand it s full functions please read the datasheet In these systems it is connected to the AY Programmable Sound cassette the VSYNC of the CRTC and the busy signal from the parallel port The PPI is selected when bit of the I O port address is set bits and then define the PPI function access as shown the is integrated into the ASIC The emulation is not complete and some functionality is not available Please see the Extra CPC documentation for more information as far as I are not used by any Mode(Basic Input/Output) is always used.Port Usage NOTE Control port LD Bit Set reset function	OUT (C)

Variables
PPI If a port is defined as	input

PPI If a port is defined as then it s output s will be at high impedance A device connected to a port of the will see &FF on the port outputs This can be tested with the following	code

PPI If a port is defined as then it s output s will be at high impedance A device connected to a port of the will see &FF on the port outputs This can be tested with the following CPC and KC compact systems To understand it s full functions please read the datasheet In these systems it is connected to the AY Programmable Sound	keyboard

PPI If a port is defined as then it s output s will be at high impedance A device connected to a port of the will see &FF on the port outputs This can be tested with the following CPC and KC compact systems To understand it s full functions please read the datasheet In these systems it is connected to the AY Programmable Sound cassette	recorder

PPI If a port is defined as then it s output s will be at high impedance A device connected to a port of the will see &FF on the port outputs This can be tested with the following CPC and KC compact systems To understand it s full functions please read the datasheet In these systems it is connected to the AY Programmable Sound cassette the VSYNC of the CRTC and the busy signal from the parallel port The PPI is selected when bit of the I O port address is set	to

PPI If a port is defined as then it s output s will be at high impedance A device connected to a port of the will see &FF on the port outputs This can be tested with the following CPC and KC compact systems To understand it s full functions please read the datasheet In these systems it is connected to the AY Programmable Sound cassette the VSYNC of the CRTC and the busy signal from the parallel port The PPI is selected when bit of the I O port address is set bits and then define the PPI function access as shown	below

PPI If a port is defined as then it s output s will be at high impedance A device connected to a port of the will see &FF on the port outputs This can be tested with the following CPC and KC compact systems To understand it s full functions please read the datasheet In these systems it is connected to the AY Programmable Sound cassette the VSYNC of the CRTC and the busy signal from the parallel port The PPI is selected when bit of the I O port address is set bits and then define the PPI function access as shown the is integrated into the ASIC The emulation is not complete and some functionality is not available Please see the Extra CPC documentation for more information as far as I	know

PPI If a port is defined as then it s output s will be at high impedance A device connected to a port of the will see &FF on the port outputs This can be tested with the following CPC and KC compact systems To understand it s full functions please read the datasheet In these systems it is connected to the AY Programmable Sound cassette the VSYNC of the CRTC and the busy signal from the parallel port The PPI is selected when bit of the I O port address is set bits and then define the PPI function access as shown the is integrated into the ASIC The emulation is not complete and some functionality is not available Please see the Extra CPC documentation for more information as far as I are not used by any	program

PPI If a port is defined as then it s output s will be at high impedance A device connected to a port of the will see &FF on the port outputs This can be tested with the following CPC and KC compact systems To understand it s full functions please read the datasheet In these systems it is connected to the AY Programmable Sound cassette the VSYNC of the CRTC and the busy signal from the parallel port The PPI is selected when bit of the I O port address is set bits and then define the PPI function access as shown the is integrated into the ASIC The emulation is not complete and some functionality is not available Please see the Extra CPC documentation for more information as far as I are not used by any Mode(Basic Input/Output) is always used.Port Usage NOTE Control port LD	A

Send it to RET Set port A to operating in	mode

Send it to RET Set port A to operating in port B to	output

Send it to RET Set port A to operating in port B to operating in mode and port C to operating in mode LD	B

Send it to RET Set port A to operating in port B to operating in mode and port C to operating in mode LD &	F7

Send it to RET Using port A B	C

Send it to RET Using port A B In this	example

Send to LD &	F4

Port A port address IN	E

Get byte from	port

Return port I O status and operating	modes

Note the next few lines are not	necessary

as port A is already acting as	however

port A port	address

Register E holds value to put into port LD &	FF

Function Documentation

PPI If a port is defined as then it s output s will be at high impedance A device connected to a port of the will see& FF on the port outputs This can be tested with the following CPC and KC compact systems To understand it s full functions please read the datasheet In these systems it is connected to the AY Programmable Sound Generator ( PSG )

PPI If a port is defined as then it s output s will be at high impedance A device connected to a port of the will see& FF on the port outputs This can be tested with the following CPC and KC compact systems To understand it s full functions please read the datasheet In these systems it is connected to the AY Programmable Sound cassette the VSYNC of the CRTC and the busy signal from the parallel port The PPI is selected when bit of the I O port address is set bits and then define the PPI function access as shown the is integrated into the ASIC The emulation is not complete and some functionality is not available Please see the Extra CPC documentation for more information Mode ( Strobed Input/ Output )

Control port LD Configuration function OUT ( C )

Variable Documentation

Control port LD A

port A port address

to previous settings LD B

PPI If a port is defined as then it s output s will be at high impedance A device connected to a port of the will see& FF on the port outputs This can be tested with the following CPC and KC compact systems To understand it s full functions please read the datasheet In these systems it is connected to the AY Programmable Sound cassette the VSYNC of the CRTC and the busy signal from the parallel port The PPI is selected when bit of the I O port address is set bits and then define the PPI function access as shown below

Port A port address IN C

PPI If a port is defined as then it s output s will be at high impedance A device connected to a port of the will see& FF on the port outputs This can be tested with the following code

Register E holds value to put into port LD E

it is given here just to make the example

Send to LD & F4

to previous settings LD & F7

Register E holds value to put into port LD & FF

as port A is already acting as however

Send it to RET Using port A B In this port A is set to port B is set to input

PPI If a port is defined as then it s output s will be at high impedance A device connected to a port of the will see& FF on the port outputs This can be tested with the following CPC and KC compact systems To understand it s full functions please read the datasheet In these systems it is connected to the AY Programmable Sound keyboard

PPI If a port is defined as then it s output s will be at high impedance A device connected to a port of the will see& FF on the port outputs This can be tested with the following CPC and KC compact systems To understand it s full functions please read the datasheet In these systems it is connected to the AY Programmable Sound cassette the VSYNC of the CRTC and the busy signal from the parallel port The PPI is selected when bit of the I O port address is set bits and then define the PPI function access as shown the is integrated into the ASIC The emulation is not complete and some functionality is not available Please see the Extra CPC documentation for more information as far as I know

Send it to RET Set port A to operating in mode

Return port I O status and operating modes

Note the next few lines are not necessary

as port A is already acting as output

Register E holds value from port

Referenced by Cpc::speed(), Cpc::z80_in_handler(), and Cpc::z80_out_handler().

PPI If a port is defined as then it s output s will be at high impedance A device connected to a port of the will see& FF on the port outputs This can be tested with the following CPC and KC compact systems To understand it s full functions please read the datasheet In these systems it is connected to the AY Programmable Sound cassette the VSYNC of the CRTC and the busy signal from the parallel port The PPI is selected when bit of the I O port address is set bits and then define the PPI function access as shown the is integrated into the ASIC The emulation is not complete and some functionality is not available Please see the Extra CPC documentation for more information as far as I are not used by any program

PPI If a port is defined as then it s output s will be at high impedance A device connected to a port of the will see& FF on the port outputs This can be tested with the following CPC and KC compact systems To understand it s full functions please read the datasheet In these systems it is connected to the AY Programmable Sound cassette recorder

PPI If a port is defined as then it s output s will be at high impedance A device connected to a port of the will see& FF on the port outputs This can be tested with the following CPC and KC compact systems To understand it s full functions please read the datasheet In these systems it is connected to the AY Programmable Sound cassette the VSYNC of the CRTC and the busy signal from the parallel port The PPI is selected when bit of the I O port address is set to

Functions

Variables

Function Documentation

Variable Documentation