WTW101@PSUVM.BITNET (Bill Warner) (01/06/90)
Hello - I need some help about Tandy joysticks. I need to connect one to an IBM type joystick connector. I need to know how the various signals from/to the Tandy joystick correspond to the IBM signals (in the DB-15 connector.) Does anyone out there know the pinout for the Tandy 6-pin DIN connector, and how or if they correspond to the IBM pinout? The IBM connector is as follows: DB-15 pin Function ---------- ------------------------------------ 1 +5 vdc 2 button 0 3 position 0 4 ground 6 position 1 7 button 1 8 +5 vdc 9 +5 vdc 10 button 2 11 position 2 12 ground 13 position 3 14 button 3 15 +5 vdc So far, I have the ground and buttons figured out, but can't figure out how the potentiometers are connected. Any help would be greatly appreciated! Thanks in advance - Bill Warner wtw101@psuvm
leonard@bucket.UUCP (Leonard Erickson) (01/10/90)
WTW101@PSUVM.BITNET (Bill Warner) writes: >I need some help about Tandy joysticks. I need to connect one to an >IBM type joystick connector. I need to know how the various signals >from/to the Tandy joystick correspond to the IBM signals (in the DB-15 >connector.) Does anyone out there know the pinout for the Tandy 6-pin >DIN connector, and how or if they correspond to the IBM pinout? Okay, here's the scoop. I can't tell from the diagram in the manual which pot is X and which is Y. They're labeled A and B. The pots are wired so that one side is grounded, the other side is +5v and the center tap (slider) is the signal. They give a variable *voltage* which is fed to a DAC. This may be a problem if the IBM expects a varying *resistance*. DIN-6 signal 1 center tap of A pot 2 center tap of B pot 3 ground (wired to pin 3 of both pots, and to both buttons) 4 button 1 (shorts to ground when pressed) 5 +5v (wired to pin 1 of *both* pots) 6 Button 2 (shorts to ground when pressed) If you figure out how to make the hookup without rewiring the *inside* of the joysticks post the details. But I somehow doubt you'll do it. In defense of Tandy, they had a reason for doing it this way. The Joysticks for the Color Computer differ only in having 1 button and 5 pins. They wanted to avoid the hassles involved in explaining to Joe Public that he couldn't use his CoCo joystick on his Tandy PC. -- Leonard Erickson ...!tektronix!reed!percival!bucket!leonard CIS: [70465,203] "I'm all in favor of keeping dangerous weapons out of the hands of fools. Let's start with typewriters." -- Solomon Short