Atari 400 User Manual

238 User's Handbook to the Atari 400 /8 00 Computers
Illustration 7-15. Run At Address Example
SELECT ITEM OR [RETURN] FOR MENU
MI
RUN FROM WHAT ADDRESS
2BOO I
N. Create MEM.SAV*
The Create MEM.SAV operation is used to create a MEM.SAV file
on the diskette in drive 1.
Whenever DOS version 2.0 is booted, the DUP.SYS disk file will
overwrite an area in memory where BASIC programs are stored.
When a MEM.SAV file is present on the diskette in drive 1, the
computer will transfer all data present in the memory area used
by DUP.5YS
int o the MEM.SAV file. Afterwards, DUP. SYS will be
loaded, and
the DO S menu will appear.
When you have finished us ing DOS, by ente rin g the
Run Cartridge operation, the program in MEM.5AV will be
automatically loaded
from MEM .SAV into RAM.
When a MEM.SAV file is used, more time will be required to load
the
DOS menu. Illustrat ion 7-16 depicts the use of Create
MEM.5AV.
*Def ine D ev ice (Item N. in DOS version 1.0) is not utili zed.

Atari 400 Specifications

General

Manufacturer	Atari
Model	400
Type	Home Computer
Release Year	1979
CPU	MOS Technology 6502
CPU Speed	1.79 MHz
ROM	10 KB
Operating System	Atari OS
Keyboard	Membrane keyboard
RAM	8 KB (expandable to 48 KB)
Graphics	ANTIC and GTIA chips
Sound	4 channels
Display	RF output for connection to TV
Storage	Optional cassette tape drive or floppy disk drive
Ports	Cartridge
Display Resolution	320x192 (16 colors)