Atari 800 User Manual

188 User's Handbook to the Atari 400/800 Computers
Table 5-7. Numeric Expression 1 Value for X/O 38
Numeric Expression 1·
Translate
Atari
Line Feed
ASCII to AS CII Input Parity
Output Parity
Append
Value
Mode
Va lu e Mode
Value Mode
Value
No
0
Light
0
Disregard
0
No change
0
Y es·· 64 Heavy 16 Odd 4
Odd
1
None 32
Even
8
Even
2
Di sregard
12
Bit On
3
·Add one value from each co lumn to det e rmin e Numeric Expression 1.
··The line feed character is appended after a carriage return (EOL).
EXAMPLE
X/O Example Program
100 GRAPHICS 5
200 COLOR 1
300 PLOT 50,20
400 DRAWTO 50 , 10
500 DRAWTO 10 , 10
600 POSITION 20, 20
700 POKE 765,1
800 XIO 18 ,# 6,O ,O,"S:"
The preceding example illustrat es the use of the XIO command
to fill an area in graphics. Th e command, 18 , specifies the
graphics
fill area action. Channel #6 is the graphics channel. The
numeric parameters are both specified as 0, and the device is the
screen
(S :).

Atari 800 Specifications

General

Processor	MOS Technology 6502
Processor Speed	1.79 MHz
ROM	10 KB
Graphics	ANTIC and GTIA chips
Release Year	1979
Display Resolution	up to 320 x 192
Colors	128 colors
Sound	4 channels
Storage	Cartridge, cassette, floppy disk
Ports	Cartridge, serial, monitor
Operating System	Atari OS