MacDoctorFL Posted December 29, 2017 Report Share Posted December 29, 2017 So Christmas is coming and I wanted to take a crack again at a few games like MS FilghtSim 1.0, Drol, DigDug to name a few. My AppleIIe had a 4mhz Transwarp card that wouldn't cut FlightSim. A whopping one frame a second while sitting on the runway. This just wont do. So I ordered a FastChip. Awesome card easy to setup. Love the variable speed control. First game to try LodeRunner. It loaded up but when I tried to play things went south. I went back to configure FastChip and wasn't able to access the setup routine. After many attempts I pulled all cards and powered up to the ] Prompt. Tapped letter q and got qv as output. See picture below. Suspecting a keyboard or bad encoder chip I borrowed a keyboard assembly from a spare unit hiding in the closet. Same thing, same output. So its a logicboard problem. Noting years of dust I scrubbed the board with denatured alchohol, q-tips, and a couple of discolorations with a q-tip dipped in windex. Pulled and reseated all chips. Powered it up and... Same thing still getting 2 for 1 on keyboard output. See picture below: starting with 1h, 2f, 3g... Any ideas what happened? Unit boots, loads floppy but keyboard not so much now. By no means do I blame FastChip for this problem, or even think its related to this weirdness. I checked voltages from PSU +5 = 5.1v +12v = +11.8v -5v=-4.0 -12v = -10.5v . I don't think the negative voltages could be causing issue but throwing it in for review. Quote Link to post Share on other sites
MacDoctorFL Posted January 3, 2018 Author Report Share Posted January 3, 2018 I've narrowed it down to possible keyboard decoder. Ordered one in with any luck will have it fixed in 10 days. Quote Link to post Share on other sites
MacDoctorFL Posted February 26, 2019 Author Report Share Posted February 26, 2019 New Encoder Fixed it. Quote Link to post Share on other sites
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