- fixed disk speed-up bug (Sherwood Forest reads with the drive motor off)
- added check for 2IMG header ID
- fixed processor status bugs in BRK, PLP, RTI, NMI, IRQ
- implemented disk writing (only in memory, not persisted)
- added support for .2MG (2IMG) disk images, including lock flag and volume number
- support meta tag for write protect in disk filename eg: NotWritable_Meta_DW0.dsk