EX AF,AF' expecting RULE_REGISTER_AF_SHADOW

[stefandrissen]

Hi!

Just giving a quick spin with my Z80 sources (Comet Assembler) for the SAM Coupé. While trying to get rid of all of the errors due to syntax differences (defb -> .db, org -> .org, &FF -> $FF, equ -> .define) I ran into one interesting minor issue:

EX AF,AF' throws:

Multiple markers at this line

• mismatched character '' expecting '''
• mismatched input 'AF' expecting RULE_REGISTER_AF_SHADOW

When using lower case for the shadow register, everything is fine:

ex af,af' is fine as is EX AF,af'

Thanks!