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Try to make the 8080 emulator a little more like the LR35902

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Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
This commit is contained in:
Adrian.Conlon 2017-07-25 20:52:10 +01:00
parent fbf797a610
commit 1b11e0750b
1 changed files with 2 additions and 33 deletions
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35
Intel8080/src/Intel8080.cpp
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@ -323,19 +323,6 @@ void EightBit::Intel8080::execute(int x, int y, int z, int p, int q) {
case 0: // NOP
cycles += 4;
break;
case 1: // EX AF AF'
break;
case 2: // DJNZ d
break;
case 3: // JR d
break;
case 4: // JR cc,d
case 5:
case 6:
case 7:
break;
default:
__assume(0);
}
break;
case 1: // 16-bit load immediate/add
@ -431,14 +418,12 @@ void EightBit::Intel8080::execute(int x, int y, int z, int p, int q) {
if (y == 6)
cycles += 7;
break;
case 6: { // 8-bit load immediate
auto& r = R(y); // LD r,n
r = fetchByte();
case 6: // 8-bit load immediate
R(y) = fetchByte();
cycles += 7;
if (y == 6)
cycles += 3;
break;
}
case 7: // Assorted operations on accumulator/flags
switch (y) {
case 0:
@ -536,8 +521,6 @@ void EightBit::Intel8080::execute(int x, int y, int z, int p, int q) {
ret();
cycles += 10;
break;
case 1: // EXX
break;
case 2: // JP HL
PC() = HL();
cycles += 4;
@ -546,8 +529,6 @@ void EightBit::Intel8080::execute(int x, int y, int z, int p, int q) {
SP() = HL();
cycles += 4;
break;
default:
__assume(0);
}
break;
default:
@ -565,8 +546,6 @@ void EightBit::Intel8080::execute(int x, int y, int z, int p, int q) {
jump();
cycles += 10;
break;
case 1: // CB prefix
break;
case 2: // OUT (n),A
out();
cycles += 11;
@ -591,8 +570,6 @@ void EightBit::Intel8080::execute(int x, int y, int z, int p, int q) {
ei();
cycles += 4;
break;
default:
__assume(0);
}
break;
case 4: // Conditional call: CALL cc[y], nn
@ -613,14 +590,6 @@ void EightBit::Intel8080::execute(int x, int y, int z, int p, int q) {
call();
cycles += 17;
break;
case 1: // DD prefix
break;
case 2: // ED prefix
break;
case 3: // FD prefix
break;
default:
__assume(0);
}
break;
default: