Posted By
crock
on 2021-01-26
12:11:13
 |  Re: C16 Black Screen, DIAG264 flashing
The Low-RAM test has three parts, the databus, the addressing, and then the device/RAM test. From a reporting perspective, any failures in these 3 steps are reported via the screen flashes, because we can not make any assumptions about the screen memory working.
If all three steps of the low-RAM finish without problem, it reports back as OK on the main screen as "LOW RAM OK". To answer the additional questions:
1) It will work with a 6510 adapter *but* the serial and cassette tests will fail because the 6510 uses different port bits on the processor to control those signals. I could potentially add this to the to-do list if I had one to work with. Andy Challis did send me a copy of the 6510 adapter ROM and the ROM tests will correctly identify it.
2) The Low-RAM tests take about 7-8 seconds to complete.
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