6502
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v6502cpp
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git-svn-id: https://subversion.assembla.com/svn/cmosher/apple2/emu/v6502@10094 884d43a4-ffbe-47e9-90ca-fd8c37d7eb32

This commit is contained in:
cmosher 2011-06-27 23:27:23 +00:00
parent 42b4af0a07
commit 6aa71fbbb9
1 changed files with 70 additions and 69 deletions
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139
v6502.cpp
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@ -123,6 +123,75 @@ void dumpSegs() {
}
}
unsigned char memory[0x10000];
void init_mem() {
for (int i = 0; i < 0x10000; ++i) {
memory[i] = 0;
}
memory[0x0200] = 0xEA; // NOP
memory[0x0201] = 0xEA; // NOP
memory[0x0202] = 0xA9; // LDA #$5A
memory[0x0203] = 0x5A; //
memory[0x0204] = 0x85; // STA $88
memory[0x0205] = 0x88; //
memory[0x0206] = 0xA9; // LDA #$23
memory[0x0207] = 0x23; //
memory[0x0208] = 0xD0; // BNE 0
memory[0x0209] = 0xF8; //
memory[0xFFFC] = 0x02; // RESET --> $0202
memory[0xFFFD] = 0x02;
// memory[0xFF] = 0x68; // PLA
/*
memory[0xFF] = 0xFF;
memory[0xFFFF] = 0xFE;
memory[0xFEFE] = 0xFD;
memory[0xFDFD] = 0xFC;
memory[0xFCFC] = 0xFB;
memory[0xFBFB] = 0xFA;
memory[0xFAFA] = 0xF9;
*/
}
void pZP() {
int a = 0;
for (int i = 0; i < 16; ++i) {
pHexw(a);
std::cout << ": ";
for (int j = 0; j < 16; ++j) {
pHex(memory[a++]);
std::cout << " ";
}
std::cout << std::endl;
}
}
unsigned char mRead(unsigned short addr) {
unsigned char x;
x = memory[addr];
#ifdef TRACEMEM
std::cout << "--------------------------------------------- ";
pHex(x);
std::cout << "<";
pHexw(addr);
std::cout << std::endl;
#endif
return x;
}
void mWrite(unsigned short addr, unsigned char data) {
/* TODO write data to addr in memory */
memory[addr] = data;
#ifdef TRACEMEM
std::cout << "--------------------------------------------- ";
pHex(data);
std::cout << ">";
pHexw(addr);
std::cout << std::endl;
#endif
}
void dumpRegs() {
std::cout << "A";
pHex(rA());
@ -159,6 +228,7 @@ void dumpRegs() {
std::cout << " AB";
pHexw(rAddr());
std::cout << std::endl;
//pZP();
}
@ -313,75 +383,6 @@ void setLow(int iseg) {
setSeg(iseg,false);
}
unsigned char memory[0x10000];
void init_mem() {
for (int i = 0; i < 0x10000; ++i) {
memory[i] = 0;
}
memory[0x0200] = 0xEA; // NOP
memory[0x0201] = 0xEA; // NOP
memory[0x0202] = 0xA9; // LDA #$5A
memory[0x0203] = 0x5A; //
memory[0x0204] = 0x85; // STA $88
memory[0x0205] = 0x88; //
memory[0x0206] = 0xA9; // LDA #$23
memory[0x0207] = 0x23; //
memory[0x0208] = 0xD0; // BNE 0
memory[0x0209] = 0xF8; //
memory[0xFFFC] = 0x02; // RESET --> $0202
memory[0xFFFD] = 0x02;
// memory[0xFF] = 0x68; // PLA
/*
memory[0xFF] = 0xFF;
memory[0xFFFF] = 0xFE;
memory[0xFEFE] = 0xFD;
memory[0xFDFD] = 0xFC;
memory[0xFCFC] = 0xFB;
memory[0xFBFB] = 0xFA;
memory[0xFAFA] = 0xF9;
*/
}
void pZP() {
int a = 0;
for (int i = 0; i < 16; ++i) {
pHexw(a);
std::cout << ": ";
for (int j = 0; j < 16; ++j) {
pHex(memory[a++]);
std::cout << " ";
}
std::cout << std::endl;
}
}
unsigned char mRead(unsigned short addr) {
unsigned char x;
x = memory[addr];
#ifdef TRACEMEM
std::cout << "--------------------------------------------- ";
pHex(x);
std::cout << "<";
pHexw(addr);
std::cout << std::endl;
#endif
return x;
}
void mWrite(unsigned short addr, unsigned char data) {
/* TODO write data to addr in memory */
memory[addr] = data;
#ifdef TRACEMEM
std::cout << "--------------------------------------------- ";
pHex(data);
std::cout << ">";
pHexw(addr);
std::cout << std::endl;
#endif
}
void putDataToChip(unsigned char data) {
/*
std::cout << "d2cpu: ";