Found these inside a non-working 71B

[rprosperi]

(03-14-2018 04:06 AM)Dave Frederickson Wrote:  The MATH ROM is at Port(.04).

Thanks Dave, forgot the MATH chip was wired-in before the RAM.

Still, it would be interesting to see the full SHOW PORT results; this would also confirm the IL port is properly wired (if an adapter is inserted).