"""Is the UMC SMN window really decoding, or are we reading an artifact?
Tests: cross-instance variation, neighbour variation, bogus-address control,
and interleaved reads (to catch a stale-latch alias)."""
import sys
sys.path.insert(0,"/Users/user/src/tinygrad"); sys.path.insert(0,"/Users/user/dev/amd-psp-re/psp_out")
from tinygrad import Device
d=Device["AMD"]; adev=d.iface.dev_impl
IDX,DAT=14,15
def rd(a):
    adev.wreg(IDX,a&0xffffffff); return adev.rreg(DAT)
print("=== 1. same offset across all 6 UMC instances (should DIFFER if decoding per-channel) ===")
for inst,b in enumerate((0xc004000,0xc804000,0xd004000,0xd804000,0xe004000,0xe804000)):
    print("  inst%d %#011x : %s"%(inst,b," ".join("%08x"%rd(b+4*i) for i in range(6))))
print("\n=== 2. fine sweep inside instance 0 (0xc004000 + 0..0x80) ===")
for off in range(0,0x84,4):
    v=rd(0xc004000+off)
    if v: print("   +%#04x = %08x"%(off,v))
print("\n=== 3. control: addresses that should NOT decode ===")
for a in (0xc003000, 0xc005000, 0xc00fff0, 0x0badf000, 0xdeadf000, 0xc404000):
    print("   %#011x = %08x"%(a,rd(a)))
print("\n=== 4. interleave test (stale-latch detector) ===")
a1,a2=0xc004000,0xc004010
seq=[rd(a1),rd(a2),rd(a1),rd(0x0badf000),rd(a1),rd(a2)]
print("   rd(a1),rd(a2),rd(a1),rd(bogus),rd(a1),rd(a2) = %s"%[hex(x) for x in seq])
print("   a1 stable across interleave: %s"%(seq[0]==seq[2]==seq[4]))
print("\n=== 5. is 0x00016000 just an echo of something? compare to MP0 base read ===")
print("   rd(0x16000) = %08x   rd(0xc004000) = %08x"%(rd(0x16000), rd(0xc004000)))
print("\nMEMSIZE=%s sos_alive=%s"%(hex(adev.rreg(0xde3)),adev.psp.is_sos_alive()))