cN2Timer Class Reference

#include <nagra2.h>

List of all members.

Public Member Functions
	cN2Timer (void)
bool	AddCycles (unsigned int count)
unsigned int	Cycles (void)
unsigned char	Ctrl (void)
void	Ctrl (unsigned char c)
unsigned char	Latch (void)
void	Latch (unsigned char val)
void	SetNumber (int Nr)
int	Number (void)

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Detailed Description

Definition at line 189 of file nagra2.h.

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Constructor & Destructor Documentation

cN2Timer::cN2Timer

(

void

)

Definition at line 36 of file nagra2.c.

{
  cycles=intrCycles=delayInterrupt=0; ctrl=0; val=0; divisor=0; invDivisor=0; latch=0xFF;
  timerBugged=false;
}

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Member Function Documentation

bool cN2Timer::AddCycles

(

unsigned int

count

)

Definition at line 42 of file nagra2.c.

References count.

{
  if(Running()) {
    cycles+=count;
    if(!delayInterrupt && InterruptSet() && cycles>=intrCycles) {
      delayInterrupt=intrCycles-cycles+3;
      if(delayInterrupt<0) delayInterrupt=count; else delayInterrupt+=count;
      intrCycles=0;
      if((ctrl&tmCONTINUOUS)) Update();
      }
    }
  if(delayInterrupt) {
    delayInterrupt-=count;
    if(delayInterrupt<0) delayInterrupt=0;
    if(!delayInterrupt) {
      Update();
      return true;
      }
    }
  return false;
}

void cN2Timer::Ctrl

(

unsigned char

c

)

Definition at line 131 of file nagra2.c.

References L_SYS_EMU, Latch(), and PRINTF.

{
  if(Running()) {
    ctrl=(ctrl&~tmRUNNING) | (val&tmRUNNING);
    if(!Running()) {
      Stop();
      --cycles;
      Update();
      PRINTF(L_SYS_EMU,"n2timer %d: stopped cycles=%d (%02x) ctrl=%02x latch=%02x\n",nr,cycles,val,ctrl,latch&0xff);
      }
    }
  else {
    ctrl=(ctrl&~tmMASK) | (val&tmMASK);
    divisor=GetDivisor();
    if(divisor) invDivisor=1.0/divisor;
    if(Running()) {
      if(!(ctrl&tmLATCHED) && divisor>0) {
        if(this->val==0) {
          timerBugged=true;
          cycles=(unsigned int)divisor;
          }
        else {
          cycles=(unsigned int)(((timerBugged?0x100:latch)-this->val+1) * divisor);
          }
        }
      if((ctrl&tmINTERRUPT)) {
        intrCycles=cycles+(unsigned int)((timerBugged?0x101:this->val?this->val:latch)*divisor);
        if(nr==2) PRINTF(L_SYS_EMU,"n2timer %d: set for %u cycles (%02x %02x)",nr,intrCycles-cycles,Latch(),ctrl&0xff);
        }
      ctrl&=~tmLATCHED;
      }
    }
}

unsigned char cN2Timer::Ctrl

(

void

)

Definition at line 115 of file nagra2.c.

Referenced by cMapMemHW::Get(), and cMapMemHW::Set().

{
  if(Running()) Update();
  return ctrl;
}

unsigned int cN2Timer::Cycles

(

void

)

Definition at line 108 of file nagra2.c.

References L_SYS_EMU, and PRINTF.

Referenced by cMapMemHW::Get().

{
  if(Running()) Update();
  PRINTF(L_SYS_EMU,"n2timer %d: read %u %02x %02x = %02x",nr,cycles,ctrl&0xff,latch&0xff,val);
  return val;
}

unsigned char cN2Timer::Latch

(

void

)

[inline]

Definition at line 209 of file nagra2.h.

Referenced by Ctrl(), cMapMemHW::Get(), and cMapMemHW::Set().

{ return latch&0xFF; }

void cN2Timer::Latch

(

unsigned char

val

)

Definition at line 121 of file nagra2.c.

{
  if(!Running()) {
    latch=val; if(latch==0) latch=0x100;
    cycles=0;
    ctrl|=tmLATCHED;
    timerBugged=false;
    }
}

int cN2Timer::Number

(

void

)

[inline]

Definition at line 212 of file nagra2.h.

Referenced by cMapMemHW::AddCycles().

{ return nr; }

void cN2Timer::SetNumber

(

int

Nr

)

[inline]

Definition at line 211 of file nagra2.h.

{ nr=Nr; }

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The documentation for this class was generated from the following files:

• sc/PLUGINS/src/sc-src/systems/nagra/nagra2.h
• sc/PLUGINS/src/sc-src/systems/nagra/nagra2.c