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Post by David Murray on Jan 1, 2005 22:04:33 GMT -5
Okay.. I hear the lines are available for both joysticks except for the up direction on port-1. I am looking at the pinouts in the commore 64 programmer's reference guide and noticed that the paddles would have seperate pins for the POT and go straight to the SID chip. Obviously the DTV has some kind of SID, but is the POT aspect implemented? Also, Pin-6 on Port 1 is classified as Button A/Light Pen. Now I know the lightpen has to be connected to the VIC chip but is this functionality available.. (Even if it required sanding off epoxy?) Which of course brings up the big question of a mouse. I believe the mouse uses the POT functions on the Commodore so is there a way to use it? Since the user-port is a no-go (not that any current commodore software supports a serial mouse) and I've heard that the PS/2 port is keyboard only and could never drive a mouse (correct me if I'm wrong) So what could we do to get a mouse working on the unit? Particularly in things like Contiki or GEOS?
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Post by NetSamurai on Jan 2, 2005 3:53:11 GMT -5
The POT and LP lines are on the CPU core, but are not routed out. That means grinding down the cob. I have already successfully ground down the side with the POT and LP pins, but haven't messed around with them any further yet, so I don't know if they are actually functional. Jeri did indicate in response to my announcement that I had successfully exposed the pins that she was happy about it because she worried that her work on the extra lines would have gone to waste. So that COULD be a hint that they are functional. It also looks like the entire cartridge port is there. There are only 8 lines (probably PB0..7) of the user port available, so I am not sure how useful that implementation would be. Though it would give an 8 bit, already decoded port for some hardware expansions.
I have been avoiding the huge job of soldering wires to those tiny pins, but if you can wait, I will get to them sometime soon and I will report whether it is worth the trouble or not. This way no-one else has to risk damaging their DTV just to find out that they don't work.
Scott McDonnell
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Post by David Murray on Jan 2, 2005 10:13:19 GMT -5
Well, the good news is.. I imagine with the light-pen, there is only 1 wire to solder.. and with the POTs there should only be 2 wires. So I guess that is better than trying to do the whole data-bus. --DavidM
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