Commodore 1581 - CMD 4: Format

CMD 4—FORMAT
BYTE
00
01
02
03
04
05
06
07
08
BIT 7 6 5
0 1 0
0 0 1
M X X
SECTOR SIZE
LAST TRACK NUMBER
NUMBER OF SECTORS
STARTING TRACK
FILL BYTE
STARTING SECTOR
4 3 2 10
10 10 1
10 0 0 0
X 0 1 1 N
♦(OPTIONAL, DEF-02,512 BYTE SECTORS)
(OPTIONAL, DEF-79)
♦♦(OPTIONAL, DEF DEPENDS ON BYTE 03)
(OPTIONAL, DEF-0)
(OPTIONAL, DEF-SE5)
(OPTIONAL, DEF-1)
♦01—256 BYTE SECTORS
02—512 BYTE SECTORS
03—1024 BYTE SECTORS
♦16—256 BYTE SECTORS
10—512 BYTE SECTORS
5—1024 BYTE SECTORS
SWITCHES: M—MODE (1 =will accept BYTES 03 - 08,0=will format, create directory
and BAM)
N—drive number
PROTOCOL: Conventional
CONVENTIONS: CMD 4 must be followed with CMD 3 or CMD 6 once to log the disk
in.
OUTPUT: None. Status will be updated within the drive.
93