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[/] [thor/] [trunk/] [software/] [emuThor/] [source/] [clsPIC.h] - Diff between revs 32 and 35

Rev 32	Rev 35
Line 1...	Line 1...
`#pragma once`	`#pragma once`
`#include "stdafx.h"`	`#include "stdafx.h"`
	`// Programmable Interrupt Controller Emulator`
	`//`
	`// This class emulates some of the functionality of the interrupt`
	`// controller. Edge sensing on the interrupt inputs is not currently`
	`// supported. The edge sensing on the clock interrupts is emulated`
	`// by resetting the interrupt input when the PIC recieves the`
	`// command to acknowledge the edge sensitive interrupt and only`
	`// driving the interrupt signal true by the timer. The timers`
	`// effectively act like pulse generators which provide only a`
	`// positive transition to the clock signal. The negative`
	`// transition is supplied when the interrupt is acknowledged.`
	`// In the real system the clock generator provides a square wave`
	`// output for the interrupts so edge sensing is necessary.`
	`// It's faked out so that from the perspective of the BIOS`
	`// software it looks the same.`

`extern clsSystem system1;`	`extern clsSystem system1;`

`class clsPIC : public clsDevice`	`class clsPIC : public clsDevice`
`{`	`{`
`public:`	`public:`
`bool enables[16];`	`bool enables[16];`
	`bool edges[16]; // edge sensitive`
`bool irq30Hz;`	`bool irq30Hz;`
`bool irq1024Hz;`	`bool irq1024Hz;`
`bool irqKeyboard;`	`bool irqKeyboard;`
`bool irqUart;`	`bool irqUart;`
`bool irq;`	`bool irq;`