Atari 130XE Uživatelský manuál stáhnout pdf (Strana 23)

2.4 Swapping the frozen and a saved program

The swap function in the freezer main menu can be used to swap the current frozen

program with the program that was saved to the freezer RAM (

[W]

key) or the RAM

extension (

[A]

key) before. This way you can jump quickly between two diﬀerent programs.

You should be sure to really have a frozen program in the freezer RAM resp. in the RAM

extension, otherwise the Atari will crash when resuming.

The modiﬁer keys

[Shift]

for clearing the player/missile collision registers and

[Con-

trol]

for loading without starting automatically can be used with the swap function just

like with the normal functions for resuming.

2.5 Clearing the RAM under the OS ROM

Because there are programs which require and also use 64k RAM, the freezer must also

take the RAM under the OS ROM into consideration. After switching the computer on,

this area is ﬁlled with useless random data. Because this data is ineligible to compression,

a certain ineﬃciency and waste of space are the consequence when saving 48k programs

to an external medium. In order to avoid this, the RAM from $C000. . . $FFFF can be

cleared with the function

[Z]

, in case the program only uses 48k RAM. The result is a

reduction of the ﬁle size of about 25% to 50% and consequently shorter loading times.

The function can be used before booting the program or before saving the program. The

ﬁrst alternative is recommended if you are not completely sure that the program really

does not store anything in this RAM area.

2.6 Starting debugger and DOS

The function

[D]

starts the built-in debugger with DOS functions. The debugger uses a

command line and the complete screen, so controlling it via a menu would not be suﬃcient.

Yet no RAM in the Atari is used or modiﬁed by this function. The states of the frozen

hardware registers of course also remain intact. The complete description of the debugger

and the DOS function can be found in chapter 3.

2.7 Starting the menu of the cartridge emulation

The function

[K]

starts the menu of the cartridge emulation. This function is only available

if the “

CartEmu

” switch or the “

FlashWrite

” switch (or both) are on,

i. e.

are turned

right. Otherwise the cartridge emulation is completely deactivated and consequently

the menu of the cartridge cannot be started. The complete description of the cartridge

emulation can be found in chapter 6. The freezer performs the following steps when the

menu of the cartridge emulation is started:

1 2 ... 18 19 20 21 22 23 24 25 26 27 28 ... 63 64

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