Atari 800 User Manual

185 User's Handbook to the Atari 400/ 800 Computers
RS-232 Serial PorI:
Output Port of a Block
32
None
0 0
Control DTR, RTS, XMI
34 None
See Table 5-5
0
Baud rate, word si ze, 36
None
See Table 5-6
~ee Table 5-6
stop bits, & ready
monitoring
Translation mode
38 Non e
See Table 5-7
ASCI I Code
Concurrent mode
40 None 0 0
Table 5-5. Numeric Expression 1 Values for XIO 34
Function*
DTR
RTS XMT
No change 0
0 0
Turn Off (XMT to 0) 128
32 2
Turn On (XMT to 1) 192
48 3
*Add value for DTR, RTS, & XMT to obtain Numeric Expression 1
Example Values DTR RTS XMT
of Numeric Expression 1
162 Off
Off
0
163 Off
Off 1
178
Off
On
0
179 Off
On
1
226
On Off
0
227
On
Off
1
242
On On
0
243 On
On 1

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