Atari 400 Technical Reference Manual page 24

0
Determines the highest RAM address.
a
Clears all of RAM to zeros.
0
Establishes all RAM interrupt vectors.
0
Formats the device tab leo
a
Initializes the caT'tridge(s >.
a Sets up the SCT'een for 24 x 40 text mode.
a Boots the cassette if directed.
a Checks cartT'idge slot(s) for diskette-boot instructions.
o Boots the diskette if diT'ected to do so and a disk drive unit
is attached.
a Transfers control to the cartridge, diskette-booted program,
cassette-booted program, or blackboard program.
[SYSTEM.RESETJ
Pressing the [SYSTEM.RESETJ key causes the
as
to perform these
following tasks:
a Clears the
as
portion of RAM.
0
Rechecks top of RAM.
a Reestablishes all RAM interrupt vectors.
a
Formats the device tab Ie.
0
Initializes the cal" tr i d g e (s ) .
a
Sets up the screen for 24 x 40 text mode.
o Transfers contl"ol to the cartridge, a diskette-booted program,
a cassette-booted program, or the blackboard program.
Note that [SYSTEM.RESETJ does not perform all the power-up
tasks listed in the power-up section.
OPERATING SYSTEM C016555 -- Section 2
23