Hello! Jim Brain wrote: > My unit also fails on the last 3 tests (direct 1 succeeds). It might be interesting to see what values you are getting in these tests? > If I try Mia's suggestion to direct the bank to 0xf during reads of > $0/$1, the ram test fails. That is strange and rather unexpected. Can you post test results in this case too? > If I use $e, the ram test succeeds, and indirect 1 then works. That makes sense - there is no read from RAM in this case, so you are reading back only the value from the latch. That supports the theory that the problems are contention between read from the latch and the RAM. > Direct and Indirect 2 always fail. These tests are meant to test whether the read back returns only lowest 4 bits, i.e. if you write $FF, the real 6509 will read back $0F. You might want to check your Verilog for that behaviour. Regards, Michau. Message was sent through the cbm-hackers mailing listReceived on 2018-03-04 15:02:56
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