Alien 8: Data at 73C8

A word per object template, the group header's bits 3-7 doubled as the index (BUILD_ROOM), in two pages: the builder keeps the page it is reading in TEMPLATES_AT, and template 31 moves it on by 64 bytes, to the second, which has seven. Templates 0 and 31 of each page are not templates, so their words are zero.

A template is a list of five-byte pieces -- graphic, the half-sizes in U and V, the height, flags -- each copied to +0 and +4 to +7 of an object record at the group's position, for as long as the byte after a piece is not zero.

A word per object template, the group header's bits 3-7 doubled as the index (BUILD_ROOM), in two pages: the builder keeps the page it is reading in TEMPLATES_AT, and template 31 moves it on by 64 bytes, to the second, which has seven. Templates 0 and 31 of each page are not templates, so their words are zero. A template is a list of five-byte pieces -- graphic, the half-sizes in U and V, the height, flags -- each copied to +0 and +4 to +7 of an object record at the group's position, for as long as the byte after a piece is not zero.
OBJECT_TABLE	73C8	DEFW $0000	Template 0: none (a header with template 0 sets the placement nudge)
	73CA	DEFW OBJECT1	Template 1
	73CC	DEFW OBJECT2	Template 2
	73CE	DEFW OBJECT3	Template 3
	73D0	DEFW OBJECT4	Template 4
	73D2	DEFW OBJECT5	Template 5
	73D4	DEFW OBJECT6	Template 6
	73D6	DEFW OBJECT7	Template 7
	73D8	DEFW OBJECT8	Template 8
	73DA	DEFW OBJECT9	Template 9
	73DC	DEFW OBJECT10	Template 10
	73DE	DEFW OBJECT11	Template 11
	73E0	DEFW OBJECT12	Template 12
	73E2	DEFW OBJECT13	Template 13
	73E4	DEFW OBJECT14	Template 14
	73E6	DEFW OBJECT15	Template 15
	73E8	DEFW OBJECT16	Template 16
	73EA	DEFW OBJECT17	Template 17
	73EC	DEFW OBJECT18	Template 18
	73EE	DEFW OBJECT19	Template 19
	73F0	DEFW OBJECT20	Template 20
	73F2	DEFW OBJECT21	Template 21
	73F4	DEFW OBJECT22	Template 22
	73F6	DEFW OBJECT23	Template 23
	73F8	DEFW OBJECT24	Template 24
	73FA	DEFW OBJECT25	Template 25
	73FC	DEFW OBJECT26	Template 26
	73FE	DEFW OBJECT27	Template 27
	7400	DEFW OBJECT28	Template 28
	7402	DEFW OBJECT29	Template 29
	7404	DEFW OBJECT30	Template 30
	7406	DEFW $0000	Template 31: none (a header with template 31 moves on to the second page)
	7408	DEFW $0000	Template 2:0: none (the second page's template 0 is the nudge)
	740A	DEFW OBJECT33	Template 2:1
	740C	DEFW OBJECT34	Template 2:2
	740E	DEFW OBJECT35	Template 2:3
	7410	DEFW OBJECT36	Template 2:4
	7412	DEFW OBJECT37	Template 2:5
	7414	DEFW OBJECT38	Template 2:6
	7416	DEFW OBJECT39	Template 2:7