C64

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Revision as of 13:22, 21 November 2019 by H3g3m0n (talk | contribs) (→‎TODO)
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  • Black PSU - 5.1v/10.3v - 5.13v/10.40v
  • White PSU - 5.15v/10.2v - 5.19v10.43v

Dead Drive

Dead C64

TODO

  • Black Screen. Pulses monitor/pops when turned on.
  • Nothing shows up when toggling on and of rapidly.
  • Disk drive spins up when turning on.
  • Load "$",8 does nothing (not sure the disk drive is working, had to replace a capacitor).
  • Check VIC-II Vss is 5v (pin 40 is 5v)
  • you're looking for the RESET line to be grounded for half a second during powerup. Pin 3 of userport. RST line goes high after half a sec (and stays high)
  • No ram chips over heat. Only hotish chip is 6510
  • Clock in on 6510 (pin 1) *seems* to be toggling (unsure, multimeter measures it lower than 5v but not ground).
  • Clock out from 6510 seems to be stuck at 5v
  • Address lines 0-11, seem to be under 5v but not GND. Except for pin 12, 13, 14, 15 which are 5v.
  • Can I use Chroma/Luma on a composite monitor (ie for just black & white image)?

Dead Monitor(s)

Power Switch

Games

https://www.youtube.com/channel/UCnhr67lnXf3ZtcKLrr9-hSA/videos