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- ; This test tries to figure out a couple of unknown opcodes.
- incdir "tests"
- include "dsp_base.inc"
- // 0x02ca is an unknown opcode found in Zelda ucodes.
- // 0x02ca logically shifts (not rotates) the whole ACC0 right by signed 16-bit value AC1.M
- // (So, if AC1.M is negative, it shifts left).
- // We'll call it lsrn, no arguments.
- // 0x02cb is the same opcode, but arithmetic.
- // We'll call it asrn, no arguments.
- test_main:
- clr $ACC0
- clr $ACC1
- lri $AC0.H, #0
- lri $AC0.M, #256
- //neg $ACC0
- lri $AC0.L, #1
- lri $AC1.H, #0xFF
- lri $AC1.M, #1
- lri $AC1.L, #0xFF
- call send_back
- cw 0x02ca
- call send_back
- cw 0x02ca
- call send_back
- cw 0x02ca
- call send_back
- cw 0x02ca
- call send_back
- jmp end_of_test
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