idating the disk after every Save-withReplace or Open-with-Replace and after every scratch. I used to lose files occasionally when I failed to perform those functions. 2. Optional drive number <I) fol lowed by 0 or 1 >.
3. Optional device number <U fol lowed by 4-33 >. Examples:
DSAVE "BAS.PROG"—saves a Basic program on the default drive and device. DSAV3-: "©BAS.I'ROG" ONU9
—saves Basic program on device \), drive 0, replacing any program
named "BAS.PROG". (Basic 2.0 equivalents are SAVE "OSAS.PRO
G",8 and SAVE "@0:BAS.PROG",{)). HEADER
HEADER is used to format ;i new disk so that it will be usable by the disk drive. After executing the HEADER command, a prompt will appear (ex cept in program mode) asking, "are
you sure?" If you are, type Y. HEADER may be followed by up to four param
eters hi any order:
—formats tlie disk in drive 0 ol
2. Drive number. This is compulsory
<D followed by 0 or 1 >.
unit 8, naming it "NEW DISK" and
5. Optional Identifier <i plus a twocharacter identifier^. Tin's must be different for each disk. This is what the DOS looks at when ii wishes to de
an identifier ol'ZX. HEADER "NEW DISKr\D<>— erases the directory of the disk in
termine if a differeni disk has been in
"NF.W DISK]". The identifier re
drive
serted. If the identifier of two disks is the same, and one disk is Inserted after the other, the DOS will not read
read and write files according to the
BAM
tells the DOS
which
blocks of the disk are used by files
and which are available. II' the Oral
renaming it
equivalents are l'KINT#
I.VNO:
NEW DISK./X" and PRINT* 15, "NlhNEWDISKl"). RECORD
BAM of the first disk. The
8,
mains the satne. (The Basic 2.0
the BAM (block allocation map) of the second disk into disk memory; iL will
o ol' unit
This command is designed to be used
in
conjunction
wild
relative
files. RECORD positions the disk's
Internal record pointer to the de
disk had certain blocks free and tbe
sired record, which then may be read
second disk
or written to. This is [he only Basic ■1.0 disk command that has an invari
is
using
these
same
blocks for file storage, it is possible
thai tbe allocated blocks of the sec ond disk will be overwritten, cor rupting what might be a valuable program or data.
[fthe identifier is omitted, the disk will not be reformatted; only the di
able syntax. It is as follows: RECORD U logical ille# , iccord# [.optional
byfe within record]. If no byte posi tion within the record is specified, byte 1 is assumed. Examples:
rectory will be erased. The identifier
RECORD*!,
would remain the Same. lowed by 4-:i! >.
/. Disk name. This is a string or a string expression in brackets.
1000—positions
the record pointer to byte 1 of record HUM. (Assuming that a com mand channel has been opened to the disk using secondary address 15, the Basic 2.0 equivalent is
-/.Optional device number <l_' fol
Examples: HEADER D0,"NEW DISK'.IZX
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