Atari 130XE Manual de usuario descargar pdf (Pagina 27)

3.1 Disk Operating System (DOS)

SAV filename,start,end

Save object ﬁle with the memory content from address

start

to (and including)

end

SAV filename/N,start,end

Save ﬁle without COM header (raw ﬁle) with the memory content from address

start to (and including) end

3.1.3 Characteristics of speciﬁc commands

Some commands have speciﬁc characteristics compared to standard DOS commands. These

characteristics are either improvements or are the logical result of working in a freezer

environment.

While renaming ﬁles with

REN

command, the speciﬁcation of the new ﬁle name may

contain arbitrary wildcards. The wildcard characters are replaced by the characters from

the original ﬁle name. This allows for working on groups of ﬁles eﬃciently, not being

restricted to the primary or secondary name (i.e. the extension) of the ﬁle.

Object ﬁles can be loaded using

LOA

. The memory area to which the ﬁle is loaded is

also displayed. In case of compound ﬁles, all memory areas are displayed. The complete

64k memory area can be used as target. This includes loading directly into the hardware

registers, which are currently frozen. The loaded program will

not

be started, to prevent

conﬂicts with the memory management logic of the freezer in case multiple segments are

loaded.

Adding the option

to the load command will display the memory area into which the

program would be loaded but will not actually load the data into memory. This is useful

in case you are only interested in the memory location to which an object ﬁle would be

loaded, i. e.

LOA FONT.COM/N

The command

LOA

can also be used to load raw data (without COM header). In this

case the address to which the data shall be loaded must be speciﬁed, i. e.

LOA FONT.DAT,8000

3.1.4 Error messages

When using the DOS and the load and save functions of the freezer for frozen programs,

errors can occur. The corresponding error messages are displayed as plain English text.

FILE NOT FOUND

The ﬁle could not be found

FILE# MISMATCH

The (internal) ﬁle number does not match, the ﬁle structure is likely to be

damaged. Rescue the other ﬁles if possible and format the disk

BAD DISK I/0

The command cannot be executed due to a bus or disk error or because the

write protection is active

NO DRIVE The disk drive does not respond

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