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[/] [thor/] [trunk/] [software/] [emuThor/] [source/] [clsPIC.cpp] - Blame information for rev 32

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#include "StdAfx.h"
#include "clsPIC.h"
 
 
clsPIC::clsPIC(void)
{
        Reset();
}
 
void clsPIC::Reset(void)
{
        int nn;
 
        for (nn = 0; nn < 16; nn++) {
                enables[nn] = false;
        }
        irq30Hz = false;
        irq1024Hz = false;
        irqKeyboard = false;
}
 
unsigned int clsPIC::Read(unsigned int ad) {
        int nn;
        unsigned int dat;
        switch((ad >> 3) & 7) {
        case 0:
                return vecno;
        default:
                dat = 0;
                for (nn = 0; nn < 16; nn++)
                        dat |= (enables[nn] << nn);
                return dat;
        }
}
 
void clsPIC::Write(unsigned int ad, unsigned int dat, unsigned int mask) {
        int nn;
        switch((ad >> 3) & 7) {
        case 1:
                for (nn = 0; nn < 16; nn++)
                        enables[nn] = (dat & (1 << nn)) != 0;
                break;
        case 2:
                enables[dat & 15] = false;
                break;
        case 3:
                enables[dat & 15] = true;
                break;
        case 5:
                if (dat==1)
                        irq1024Hz = false;
                if (dat==2)
                        irq30Hz = false;
                if (dat==7)
                        irqUart = false;
                if (dat==3)
                        irqKeyboard = false;
                break;
        }
}
 
void clsPIC::Step(void) {
        vecno = 192;
        irq = system1.cpu2.irq = false;
        if (enables[7] & irqUart) {
                irq = system1.cpu2.irq = true;
                vecno = 192+7;
        }
        if (enables[3] & irqKeyboard) {
                irq = system1.cpu2.irq = true;
                vecno = 192+3;
        }
        if (enables[2] & irq30Hz) {
                irq = system1.cpu2.irq = true;
                vecno = 192+2;
        }
        if (enables[1] & irq1024Hz) {
                irq = system1.cpu2.irq = true;
                vecno = 192+1;
        }
        system1.cpu2.vecno = vecno;
}
 
 

Line No.	Rev	Author	Line
1	30	robfinch	`#include "StdAfx.h"`
2			`#include "clsPIC.h"`
3
4
5			`clsPIC::clsPIC(void)`
6			`{`
7			`Reset();`
8			`}`
9
10			`void clsPIC::Reset(void)`
11			`{`
12			`int nn;`
13
14			`for (nn = 0; nn < 16; nn++) {`
15			`enables[nn] = false;`
16			`}`
17			`irq30Hz = false;`
18			`irq1024Hz = false;`
19			`irqKeyboard = false;`
20			`}`
21	32	robfinch
22			`unsigned int clsPIC::Read(unsigned int ad) {`
23			`int nn;`
24			`unsigned int dat;`
25			`switch((ad >> 3) & 7) {`
26			`case 0:`
27			`return vecno;`
28			`default:`
29			`dat = 0;`
30			`for (nn = 0; nn < 16; nn++)`
31			`dat \|= (enables[nn] << nn);`
32			`return dat;`
33			`}`
34			`}`
35
36			`void clsPIC::Write(unsigned int ad, unsigned int dat, unsigned int mask) {`
37			`int nn;`
38			`switch((ad >> 3) & 7) {`
39			`case 1:`
40			`for (nn = 0; nn < 16; nn++)`
41			`enables[nn] = (dat & (1 << nn)) != 0;`
42			`break;`
43			`case 2:`
44			`enables[dat & 15] = false;`
45			`break;`
46			`case 3:`
47			`enables[dat & 15] = true;`
48			`break;`
49			`case 5:`
50			`if (dat==1)`
51			`irq1024Hz = false;`
52			`if (dat==2)`
53			`irq30Hz = false;`
54			`if (dat==7)`
55			`irqUart = false;`
56			`if (dat==3)`
57			`irqKeyboard = false;`
58			`break;`
59			`}`
60			`}`
61
62			`void clsPIC::Step(void) {`
63			`vecno = 192;`
64			`irq = system1.cpu2.irq = false;`
65			`if (enables[7] & irqUart) {`
66			`irq = system1.cpu2.irq = true;`
67			`vecno = 192+7;`
68			`}`
69			`if (enables[3] & irqKeyboard) {`
70			`irq = system1.cpu2.irq = true;`
71			`vecno = 192+3;`
72			`}`
73			`if (enables[2] & irq30Hz) {`
74			`irq = system1.cpu2.irq = true;`
75			`vecno = 192+2;`
76			`}`
77			`if (enables[1] & irq1024Hz) {`
78			`irq = system1.cpu2.irq = true;`
79			`vecno = 192+1;`
80			`}`
81			`system1.cpu2.vecno = vecno;`
82			`}`
83
84

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[/] [thor/] [trunk/] [software/] [emuThor/] [source/] [clsPIC.cpp] - Blame information for rev 32