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Published 20 hours ago • verified publisher icon stid

Extended RAM Test

Open svenpetersen1965 opened this issue 3 years ago • 0 comments

It is not a bug, just a suggestion. The original RAM Test only tests 4k of RAM (according to the dead test manual). It would be nice to have a final RAM Test, that tests all RAM. Or at least the previously untested RAM. The original RAM Test is IMHO not very effective, either. It sets all bits separately etc. Actually, a test writing AA, then 55 and finally a Pseudo Random Number sequence, would also reveal address bus problems. The PRN are not so Random, just a fix sequence of bytes that repeat after like 247 and not 256 numbers. This odd length allows to see, if there are RAM pages confused or overwritten. I have done such a test for the VIC-20 (Expansion) RAM Tester, that I have written. It would be a really helpful feature. Probably not much works (maybe a bit tricky for the memory below the Kernal).

Your SID Filter Test is really cool, BTW.

Regards, Sven.

svenpetersen1965 avatar Feb 26 '21 09:02 svenpetersen1965