18 lines
482 B
Kotlin
18 lines
482 B
Kotlin
package android.emu6502.instructions.impl
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import android.emu6502.CPU
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import android.emu6502.instructions.BaseInstruction
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import android.emu6502.instructions.Instruction
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/** Jump to SubRoutine */
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class JSR(private val cpu: CPU) : BaseInstruction(Instruction.JSR, cpu.instructionList) {
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override fun absolute() {
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val addr = cpu.popWord()
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val currAddr = cpu.PC - 1
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cpu.stackPush(currAddr.shr(8).and(0xff))
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cpu.stackPush(currAddr.and(0xff))
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cpu.PC = addr
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}
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}
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