;
; super block definitions
;
frbcount	equ	80	;free block list size
fricount	equ	80	;free inode list size
frbsize		equ	frbcount*4+2	;free list size in bytes
frisize		equ	fricount*2+2	;free list size in bytes
		struct	0
sb.version	defs	2	;version number
sb.cromix	defs	6	;'cromix'
sb.istart	defs	2	;first inode block
sb.isize	defs	2	;number of inodes
sb.fsize	defs	4	;max block number
sb.time		defs	6	;last modified time
		mend	struct
		struct	512-frbsize-frisize
sb.nfree	defs	2	;free block count
sb.free		defs	frbcount*4	;free list address
sb.ilist	defs	0	;i-list address
sb.ninode	defs	2	;free inode count
sb.inode	defs	fricount*2	;free inodes
		mend	struct
	eject
;
; inode buffer definitions
;
		struct	0
		defs	2	;avail list pointers
		defs	2
in.devn		defs	2	;inode device number
in.inum		defs	2	;inode number
in.flags	defs	1	;flags byte
in.ucount	defs	1	;usage count

in.begin	defs	0	;beginning of inode on disk
in.owner	defs	2	;file owner's user id
in.group	defs	2	;file owner's group id
in.aowner	defs	1	;owner access
in.agroup	defs	1	;group access
in.aother	defs	1	;other access
in.stat		defs	1	;file status
in.nlinks	defs	1	;number of links to inode
		defs	1
in.size		defs	4	;file total size (in bytes)
in.inode	defs	2	;this inode number
in.parent	defs	2	;parent inode number (for directories only)
in.sdevn	defs	0	;special device major & minor numbers
in.dcount	defs	2	;number entries in a directory
in.usage	defs	4	;number blocks actually used in file
in.tcreate	defs	6	;time created
in.tmodify	defs	6	;time last modified
in.taccess	defs	6	;time last accessed
in.tdumped	defs	6	;time last dumped (backed up)

in.index	defs	4*20	;block pointers
inosize		defs	0	;total inode size in bytes
		mend	struct
 
inocount	equ	20	;size of inode table
 
is.type		defl	7	;file type mask (in.stat)
is.ordin	defl	0	;ordinary file
is.direct	defl	1	;directory file
is.char		defl	2	;character device
is.block	defl	3	;block device
is.pipe		defl	4	;pipe file

is.alloc	defl	7	;inode allocated (bit in in.stat)

if.lock		defl	0	;inode locked (in use by a process)
if.want		defl	1	;inode wanted by another process
if.modf		defl	2	;inode has to be written out
if.modt		defl	3	;update time modified
if.acct		defl	4	;update time accessed

ac.read		defl	0	;read access bit
ac.exec		defl	1	;execute access bit
ac.writ		defl	2	;write access bit
ac.apnd		defl	3	;append access bit
 
	eject
;
; directory format definitions
;
		struct	0
dr.name		defs	24	;name of entry
namsize		defs	0	;size of name
		defs	4	;reserved
dr.stat		defs	2	;status & flags
dr.inum		defs	2	;inode number of file
dirsize		defs	0	;directory entry size (32 bytes)
		mend	struct

ds.alloc	equ	7	;entry allocated bit