Atari 400 Hardware Manual

Memory MaE DisElay Modes
I OS
I
!Colors IPixelsiBytesiScan !Color I
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Bit
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Modes!HEX
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Line
I Line!Pixel!Pixel IPixeljPixel
!S el ect!
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I I I I
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3
I
8
4
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40
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10
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8
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4
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2
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01
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I
10
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I I I I
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11
PF2
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4
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9
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80
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10
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4
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2
I
1
I
0 BAK
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I I
1
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5
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A
I
4
80 20
4
2 2
I
PFO
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I
PF1
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I
PF2
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I
6
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B
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2
160
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0 BAK
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I
1 PFO
2
160
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1 0
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1 PFO
I
I
BAK
7
I
D
4
160
40 2
1 2
I
01 PFO
I
I
10 PF1
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I
11 PF2
I
I
00 BAK
-
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E 4
160
40 1
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01 PFO
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10 PF1
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11
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8
1
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40
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1
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0 PF2
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1 PF1
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{LUM)
11.12

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)