Added create_emulator_boot_segment to disk images and files

* prepare a segment that can be written to disk and booted by an emulator

atrcopy/ataridos.py

@@ -1,7 +1,7 @@
 import numpy as np
 
 from . import errors
-from .diskimages import DiskImageBase, BaseHeader
+from .diskimages import DiskImageBase, BaseHeader, Bootable
 from .segments import SegmentData, EmptySegment, ObjSegment, RawSectorsSegment, DefaultSegment, SegmentedFileSegment, SegmentSaver, get_style_bits
 from .utils import *
 from .executables import get_xex
@@ -267,7 +267,7 @@ class RunAddressSegment(ObjSegment):
 
 
 
-class AtariDosFile:
+class AtariDosFile(Bootable):
     """Parse a binary chunk into segments according to the Atari DOS object
     file format.
     

atrcopy/cartridge.py

@@ -303,4 +303,11 @@ class RomImage(DiskImageBase):
     def parse_segments(self):
         r = self.rawdata
         s = ObjSegment(r, 0, 0, self.header.main_origin, name="Main Bank")
-        return [s]
+        self.segments = [s]
+
+    def create_emulator_boot_segment(self):
+        print(self.segments)
+        s = self.segments[0]
+        if s.origin == 0:
+            return None
+        return s

atrcopy/diskimages.py

@@ -92,7 +92,12 @@ class BaseHeader:
         return self.sector_class(self.sector_size, data)
 
 
-class DiskImageBase:
+class Bootable:
+    def create_emulator_boot_segment(self):
+        return ObjSegment(self.rawdata, 0, 0, 0)
+
+
+class DiskImageBase(Bootable):
     default_executable_extension = None
 
     def __init__(self, rawdata, filename="", create=False):

atrcopy/dos33.py

@@ -1,7 +1,7 @@
 import numpy as np
 
 from . import errors
-from .diskimages import BaseHeader, DiskImageBase
+from .diskimages import BaseHeader, DiskImageBase, Bootable
 from .utils import Directory, VTOC, WriteableSector, BaseSectorList, Dirent
 from .segments import DefaultSegment, EmptySegment, ObjSegment, RawTrackSectorSegment, SegmentSaver, get_style_bits, SegmentData
 from .executables import get_bsave
@@ -594,7 +594,7 @@ class Dos33DiskImage(DiskImageBase):
         return segment
 
 
-class Dos33BinFile:
+class Dos33BinFile(Bootable):
     """Parse a binary chunk into segments according to the DOS 3.3 binary
     dump format
     """
@@ -637,6 +637,9 @@ class Dos33BinFile:
         else:
             raise errors.InvalidBinaryFile(f"Invalid BSAVE header")
 
+    def create_emulator_boot_segment(self):
+        return self.segments[0]
+
 
 class ProdosHeader(Dos33Header):
     file_format = "ProDOS"