Allow logical grouping of individual control lines

[c0zmo]

Grouping individual control lines

In the current software, consecutive control lines can be tempered with as a n-bit-value using commands like 'increment port a bits 0-3' or 'clear port b bits 6-7'. However, there are situations where it would be very useful if individual lines on both ports could be grouped together to perform as above, i.e. when using a ribbon cable to connect the control lines. My suggestion is the implementation of a 'GROUP' command. As a side effect, the configuration would become more readable.

Examples:
GROUP RepromCharset=port a bit 0, port b bit 0
GROUP RepromKernal=port a bit 1, port b bit 1
GROUP MixSID=port a bit 6, port a bit 7

Now the Charset and Kernal could be changed with:
C: INCREASE RepromCharset
K: INCREASE RepromKernal

[hbekel]

As for the suggestion itself, this will require some work under hood, since neither the configuration format nor the code dealing with bit ranges is prepared for this. I will have to look into it.

However, I don't think a dedicated GROUP directive is required, since the same can be achieved with user defined symbols, as in

RepromCharset = port a bit 0, port b bit 0

C: increase RepromCharset