Plus42 Equations, Preview Release

[Thomas Okken]

New update:

1. Added DIRECT / NUMERIC setting in the MODES menu, to enable / disable the direct solver. It is enabled by default.
2. Fixed drawing of results at the top of the screen, so numbers get erased before new numbers get drawn to the same spot.

I also checked the INTEG situation, and confirmed that when the direct solver generates an inverse during a PLOT or INTEG operation, the generated code is reused for the duration of the entire operation. This means that when INTEG is called by the plot viewer, for a function that is itself calculated using SOLVE, and the operation is very slow, this indicates that the numerical solver is at work, and setting ACC is the right thing to do to speed up the operation.