!!!Atari CX85 Numerical Keypad
[{Image src='AtariCX85/Atari-CX85.jpg' width='400' height='307'}]

!!Source
[Wikipedia|http://en.wikipedia.org/wiki/Atari_8-bit_computer_peripherals]
!!Documentation
* [Atari CX85 Numerical Keypad-Users Guide|AtariCX85/Atari CX85 Numerical Keypad-User_s Guide.pdf] (PDF)
* [Atari CX85 Numerical Keypad-Technical Reference Notes - 2 pages|AtariCX85/Atari CX85 Numerical Keypad-Technical Reference Notes.pdf] (PDF)
* [Atari CX85 Numerical Keypad-Technical Reference Notes - 1 page|Atari_CX85_Numerical_Keypad_Technical_Reference_Notes_1_page.pdf] (PDF) ; size: 10.5 MB
* [Atari CX85 Numerical Keypad-Field Service Manual|atari_cx85_field_service_manual_screen.pdf] (PDF)
[{Image src='CX 85 Field Service Manual.jpg' width='307' height='400'}]
Atari CX85 Numerical Keypad - Field Service Manual - Thank you so much Bill Lange! :-))) We can't thank you enough to bring that ultra rare document to the light.

!!ATR-Images
* [The Atari CX85 Master Diskette CX8139.atr] ; Original master disk
* [AtariCX85/cx85.atr] ; Driver disk
* [Atari CX85 Numerical Keypad - Field Service Manual program|Atari_CX85_Numerical_Keypad-Field_Service_Manual_Program.atr] ; Basic program from the Field Service Manual to test the device
* [CX85 Reeve Key.atr] ; Copyright (C) 1986 by Alan Reeve

!!Source Codes
* [original CX85 Keyboard Handler] (original Atari Assembler Source)
* [CX85 Keyboard Handler] (reverse engineered Source)
* Atari CX85 Numerical Keypad - Field Service Manual Basic program to test the device:
{{{
0 GRAPHICS 0:DIM FUNC$(10):PRINT :PRINT 
20 POKE 755,0:IF PEEK(645)=1 THEN 20
30 POKE 77,0:STICK1=PEEK(633)
40 ALLPOT=PEEK(53768):IF ALLPOT=0 THEN 40
50 IF ALLPOT=255 AND STICK1=12 THEN STICK1=16
60 FOR X=0 TO STICK1:READ A:NEXT X:IF A>9 THEN 80
70 PRINT A;" ";:GOTO 90
80 RESTORE 200:FOR X=0 TO A-10:READ FUNC$:NEXT X:PRINT FUNC$;" ";
90 FOR T=0 TO 50:NEXT T:RESTORE :GOTO 20
100 DATA 10,4,5,6,11,7,8,9,12,1,2,3,0,13,14,15,16
200 DATA DELETE,NO,YES,.,+ ENTER,-,ESCAPE
}}}

!!Images
[{Image src='AtariCX85/CX85_1.jpg' width='435' height='418'}]
Atari CX85 Numerical Keypad - Diskette - front side\\
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[{Image src='AtariCX85/CX85_2.jpg' width='435' height='418'}]
Atari CX85 Numerical Keypad - Diskette - back side