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Simplify LR35902 memory read/write a little.

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Signed-off-by: Adrian.Conlon <adrian.conlon@arup.com>
This commit is contained in:
Adrian.Conlon 2017-07-18 11:28:06 +01:00
parent 35def4184a
commit 974c3353cc
1 changed files with 7 additions and 11 deletions
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18
LR35902/src/LR35902.cpp
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@ -471,12 +471,12 @@ void EightBit::LR35902::executeCB(int x, int y, int z, int p, int q) {
}
break;
case 1: // BIT y, r[z]
bit(y, R(z));
bit(y, R(z));
cycles += 2;
if (z == 6) {
m_bus.fireReadBusEvent();
cycles += 2;
if (z == 6) {
m_bus.fireReadBusEvent();
cycles += 2;
}
}
break;
case 2: // RES y, r[z]
res(y, R(z));
@ -788,9 +788,7 @@ void EightBit::LR35902::executeOther(int x, int y, int z, int p, int q) {
break;
case 5: // GB: LD (nn),A
fetchWord();
m_memory.ADDRESS() = MEMPTR();
m_memory.reference() = A();
m_bus.fireWriteBusEvent();
m_bus.write(MEMPTR().word, A());
cycles += 4;
break;
case 6: // GB: LD A,(FF00 + C)
@ -800,9 +798,7 @@ void EightBit::LR35902::executeOther(int x, int y, int z, int p, int q) {
break;
case 7: // GB: LD A,(nn)
fetchWord();
m_memory.ADDRESS() = MEMPTR();
A() = m_memory.reference();
m_bus.fireReadBusEvent();
A() = m_bus.read(MEMPTR().word);
cycles += 4;
break;
}