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decoder - Simplify RST command

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We can calculate the rst address directly from the op code.
This commit is contained in:
madmaurice 2023-08-28 19:39:18 +02:00
parent ad2334a6af
commit e4a6b1f9b4
1 changed files with 2 additions and 14 deletions
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16
cpu/decoder.cpp
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@ -298,21 +298,9 @@ void Cpu::step()
mcycles = 2; mcycles = 2;
} }
} }
else if(op & 0xC7 == 0xC7) else if(op & 0xC7 == 0xC7) // RST
{ {
u16 rst_addr; u16 rst_addr = op & 0x38;
switch((op >> 3) & 0x7)
{
case 0x0: rst_addr = 0x00; break;
case 0x1: rst_addr = 0x08; break;
case 0x2: rst_addr = 0x10; break;
case 0x3: rst_addr = 0x18; break;
case 0x4: rst_addr = 0x20; break;
case 0x5: rst_addr = 0x28; break;
case 0x6: rst_addr = 0x30; break;
case 0x7: rst_addr = 0x38; break;
}
doCall(rst_addr); doCall(rst_addr);
} }
else else