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package cpu.opcodes
import cpu.Operation
import cpu.Registers
import cpu.Registers.Flag
import ram.Ram
import BitManipulation as bm
val calls = mapOf(
0xCD to Operation("CALL nn", 2, 12) { r, m, a -> call(bm.argsToWord(a), r, m)},
0xC4 to Operation("CALL NZ,nn", 2, 12) { r, m, a -> if(r.getFlag(Flag.ZERO) == 0) call(bm.argsToWord(a), r, m)},
0xCC to Operation("CALL Z,nn", 2, 12) { r, m, a -> if(r.getFlag(Flag.ZERO) == 1) call(bm.argsToWord(a), r, m)},
0xD4 to Operation("CALL NC,nn", 2, 12) { r, m, a -> if(r.getFlag(Flag.CARRY) == 0) call(bm.argsToWord(a), r, m)},
0xDC to Operation("CALL C,nn", 2, 12) { r, m, a -> if(r.getFlag(Flag.CARRY) == 1) call(bm.argsToWord(a), r, m)}
)
private fun call(word: Int, r: Registers, m: Ram) {
val nextAddress = (r.PC + 3) and 0xFFFF
m.writeByte(r.decrementAndGetSP(), bm.getMsb(nextAddress))
m.writeByte(r.decrementAndGetSP(), bm.getLsb(nextAddress))
r.PC = word
}
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