Support FIELDs and addressable logic

[nrivard]

Does galette support the FIELD nomenclature found in WinCUPL? Great example on this blog post: https://hackaday.io/project/174128-db6502/log/183434-address-decoding-and-how-to-get-it-right

But essentially, for things like address decoding, you'd write:

// pins and names
Pin 4  =  A15;
Pin 5  =  A14;
Pin 6  =  A13;
Pin 7  =  A12;
Pin 8  =  A11;
Pin 9  =  A10;
Pin 10 =  A9;
Pin 11 =  A8;

// bundling named pins into a FIELD
FIELD Address = [A15..A00]; 

// now let compiler figure out the actual pin logic states for this address mapping
ZP_STACK       = Address:[0000..01FF];
IO_SHADOW      = Address:[0200..02FF];
RAM            = Address:[0300...7FFF]; 
ROM            = Address:[8000..FFFF];

This scheme translates to:

ROM = A15
IO_SHADOW = /A15 & /A14 & /A13 & /A12 & /A11 & /A10 & /A9 & /A8

[simon-frankau]

Sorry for my slow response - work has left little time for side projects.

Galette doesn't support FIELD - I've only tried for GALasm compatibility, and not looked at WinCUPL. However, now you've mentioned it, this looks like an excellent addition. I doubt I will work on it soon, so don't hold your breath, but I'd like to add this.