Atari 400 Hardware Manual

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PAGE
PA11 '.,IAR I ABLES
•= PMEl
BOARD •a
T0 •a
••J2
•+1
;CHECKER BOARD <ONLY J2 BLACK SQUARES ARE USED!
;TEMP
FOR MOVING BOARD TO MEM MAP
; PLA'~ER AND MISSILE G<tAPHICS.
;PLAYERS
ARE USED FOR SQUARES, MISSILES FOR LEFT AND RIGHT BORDERS
•=
PMEl+$180
GRM0J
•=
•+$89
;MISSILE GRAPHICS
GRP9
•=
•+$80
;PLAYER 9 GRAPHICS
GRP1
•a
•+$80
; PLAYER 1
GRP2
....
•+$80
J
2
GRP3
•s
•••e0
;
J
;
TlTL
....
•+20
; TOP LINE OF CHARS -- ATASCII MESSAGE
TOPBRD •=
•+16
;TOP BORDER OF BOARD
BRDSP
•=
8+16+•
; BOARD DISPLAY
80TBRD
••
•+16
; BOTTOM BORDER
'

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)