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-rw-r--r--src/cpu/instruction.spec.ts1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/cpu/instruction.spec.ts b/src/cpu/instruction.spec.ts
index 0bf71bd..0665fe8 100644
--- a/src/cpu/instruction.spec.ts
+++ b/src/cpu/instruction.spec.ts
@@ -240,6 +240,7 @@ describe('avrInstruction', () => {
avrInstruction(cpu);
expect(cpu.pc).toEqual(0x11234);
expect(cpu.cycles).toEqual(4);
+ expect(cpu.data[SP]).toEqual(0x80 - 3); // according to datasheet: SP ← SP - 3
expect(cpu.data[0x80]).toEqual(1); // Return address
});