EP_New ($36) - Return pointer to future new entry in File Area

Register Parameters

IN:
   A = EP_NEW
   C = slot number containing File Eprom Area

OUT:
   Fc = 0, File Eprom available
        BHL = pointer to first byte of free space (B = absolute bank of slot C)

   Fc = 1, File Area was not found in slot C

Registers changed after return:
   ...CDE../IXIY same
   AFB...HL/.... different

Notes

Return BHL pointer to new file entry (also first byte of free space in File Eprom Area, inserted in slot C).