MFM1%LEHIGH.BITNET@ibm1.cc.lehigh.edu (mark masters) (01/16/89)
Rob, I don't think I could get thru to you via normal email, I'm not sure why. But to continue, The chip with the joystick is a 74LS157 not a 74HCT157 as in the schematics, since the schematics are for the older A2000. I'm not sure what would happen if you used an HCT part, but I think cmos and TTL interfacing doesn't work well. I tried a 74157 (not low power schotky) and that had real wierd effects. Let me know how your repair job goes, or if you have any further questions. mark <mfm1@lehigh.bitnet>