Altai Joystick Interface

The Altai was made in Taiwan. Essentially a copy of the PASE interface. It was grey, this was black!
Of all the Oric joystick interfaces, this is probably the most common.

ORIC/ATMOS JOYSTICK INTERFACE

This interface can be used with either Oric-1 or Oric Atmos computers to control games written in either basic or machine code. Many commercially available games are suitable for use with this kind of .interface. Connection The interface connects with any standard Atari compatible joystick, and either one or two joysticks can be used. Simply plug the joystick(s) into the appropriate socket, and plug the interface into the 20-pin port at the back of the computer. Make sure that the power is switched off when connecting the interface. Using the interface. Firstly, it is necessary to type in the program listed opposite (Lines 9980- 9996). When this program is used, it will return the values as shown every time you PEEK(#BFFE) (left joystick) or PEEK(#BFFF) (right joystick). CSAVE the program before you RUN it - It will crash if you have made any errors. Now try adding the lines
10 GOSUB9980
20 L=PEEK(#BFFE):R=PEEK(#BFFF)
30 PRINTL,R
40 G0TO 20
NOTE: Since the interface uses the same port as the sound generator, sound quality may be effected./

Pressing the FIRE button has the effect of subtracting 32 from the figure.

9980 DATA #4B,#AD,#01,#03
9981 DATA #48,#AD,#03,#03
9982 DATA #48,#A9,#C0,#8D
9983 DATA #03,#03,#A9,#80
9984 DATA #8D,#0F,#03,#A0
9985 DATA #0F,#03,#80,#FE
9986 DATA #BF,#A9,#40,#8D
9987 DATA #0F,#03,#AD,#01
9988 DATA #03,#8D,#FF,#BF
9989 DATA #68,#8D,#03,#03
9990 DATA #68,#8D,#0F,#03
9991 DATA #68,#4C,#03,#EC
9992 MEM=#996D
9993 READ DTA:POKE MEM,DTA
9994 IF DTA<>#EC THEN MEM=MEM+1:GOTO 9993
9995 DOKE#0229,#996D
9996 RETURN

ATMOS MODIFICATION:-

Change line 9991 to read:
DATA #68,#4C,#22,#EE
Change line 9994 to:
IF DTA<>#EE THEN MEM=MEM+1:GOTO9993
Change line 9995 : DOKE#2045,#996D