ACT apricot - Page 296

DISKS
LBLbooLsize
WORD *
112 Number of bootstrap
sectors
LBLbooLaddr
WORD *
00H,OD80H
boot load address
(OD80:0000H)
LBLbooLstart
WORD *
29H,OEOOH
boot start address
(OEOO:0029H)
LBLdata_locn
WORD
13,0 Sector No.of first
data block
LBLgeneration
WORD
°
Generation number
LBLcopy_count
WORD
°
Copy count
LBLcopY-IDax WORD
FFFFH Maximum number of
copies
LBLseriaLid WORD
0,0,0,0
Serial Number
LBLparLid WORD
0,0,0,0
Part Number
LBLcopyrite
ASCII
(C) ACT Copyright or
Information
data
Those data items marked * are vital to the operation of
the current Boot ROM, the rest may be used by future BIOS
releases.
MS-DOS AND BIOS UTILISATION OF THE DISKS
FAT's 1 and 2
The FAT (File Allocation Table) is what MS-DOS uses to
remember
where on the disk each file will go.
Directory
The directory is MS-DOS's list of contents on a disk.
Pointing to the first FAT entry for a file. Other information
such as file size and creation date is kept in the directory.
Character Font
A memory image of the character font which will be
directly loaded into memory. The last 2kbytes of the
character font is the Apricot Logo which is loaded into its
respective place in memory.