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[/] [thor/] [trunk/] [software/] [emuThor/] [source/] [clsPIC.cpp] - Blame information for rev 35

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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;
                edges[nn] = false;
        }
        irq30Hz = false;
        irq1024Hz = false;
        irqKeyboard = false;
        irqUart = 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 4:
                for (nn = 0; nn < 16; nn++)
                        edges[nn] = (dat & (1 << nn)) != 0;
                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			`clsPIC::clsPIC(void)`
5			`{`
6			`Reset();`
7			`}`
8
9			`void clsPIC::Reset(void)`
10			`{`
11			`int nn;`
12
13			`for (nn = 0; nn < 16; nn++) {`
14			`enables[nn] = false;`
15	35	robfinch	`edges[nn] = false;`
16	30	robfinch	`}`
17			`irq30Hz = false;`
18			`irq1024Hz = false;`
19			`irqKeyboard = false;`
20	35	robfinch	`irqUart = false;`
21	30	robfinch	`}`
22	32	robfinch
23			`unsigned int clsPIC::Read(unsigned int ad) {`
24			`int nn;`
25			`unsigned int dat;`
26			`switch((ad >> 3) & 7) {`
27			`case 0:`
28			`return vecno;`
29			`default:`
30			`dat = 0;`
31			`for (nn = 0; nn < 16; nn++)`
32			`dat \|= (enables[nn] << nn);`
33			`return dat;`
34			`}`
35			`}`
36
37			`void clsPIC::Write(unsigned int ad, unsigned int dat, unsigned int mask) {`
38			`int nn;`
39			`switch((ad >> 3) & 7) {`
40			`case 1:`
41			`for (nn = 0; nn < 16; nn++)`
42			`enables[nn] = (dat & (1 << nn)) != 0;`
43			`break;`
44			`case 2:`
45			`enables[dat & 15] = false;`
46			`break;`
47			`case 3:`
48			`enables[dat & 15] = true;`
49			`break;`
50	35	robfinch	`case 4:`
51			`for (nn = 0; nn < 16; nn++)`
52			`edges[nn] = (dat & (1 << nn)) != 0;`
53			`break;`
54	32	robfinch	`case 5:`
55			`if (dat==1)`
56			`irq1024Hz = false;`
57			`if (dat==2)`
58			`irq30Hz = false;`
59			`if (dat==7)`
60			`irqUart = false;`
61			`if (dat==3)`
62			`irqKeyboard = false;`
63			`break;`
64			`}`
65			`}`
66
67			`void clsPIC::Step(void) {`
68			`vecno = 192;`
69			`irq = system1.cpu2.irq = false;`
70			`if (enables[7] & irqUart) {`
71			`irq = system1.cpu2.irq = true;`
72			`vecno = 192+7;`
73			`}`
74			`if (enables[3] & irqKeyboard) {`
75			`irq = system1.cpu2.irq = true;`
76			`vecno = 192+3;`
77			`}`
78			`if (enables[2] & irq30Hz) {`
79			`irq = system1.cpu2.irq = true;`
80			`vecno = 192+2;`
81			`}`
82			`if (enables[1] & irq1024Hz) {`
83			`irq = system1.cpu2.irq = true;`
84			`vecno = 192+1;`
85			`}`
86			`system1.cpu2.vecno = vecno;`
87			`}`
88
89

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[/] [thor/] [trunk/] [software/] [emuThor/] [source/] [clsPIC.cpp] - Blame information for rev 35