64 modes is what the Syntor X could support (sort of, two independent
> banks of 32) from what I recall.
The M6 mode line is used, as you would expect. It basically ends up
selecting which moby of the EPROM to access. The ways that 64 modes
aren't really supported are largely related to the control head stack
(fixed interpretation of cable signals) and the scan programming (only
32 bits for scan definitions). The Operator Select MPL head uses the
upper moby to provide the feature, so you can't really have 64 modes and
MPL. The HHCH may differ slightly.
De