Post by jusalak on Mar 24, 2023 19:52:29 GMT
I obtained a flat C128 with MMU chip with a text "8722R1CBM 2885".
Seems to be a revision 1 MMU. Judging on the basis on mmuswap test results (https://sourceforge.net/p/vice-emu/code/HEAD/tree/testprogs/c128/mmu/mmuswap-tests.txt), a R2 MMU seems to be much more common.
They have also differences in test behaviour.
It would be interesting to gather more data and test results.