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  • iz8dwf's Avatar
    August 13th, 2017, 10:34 PM
    iz8dwf replied to a thread Blank Screen - C64 in Commodore
    Hi, first check both the power supply levels. 10V I think it's the AC one, the other pair must be 5V DC or slightly more, standard commodore...
    18 replies | 423 view(s)
  • iz8dwf's Avatar
    August 7th, 2017, 12:01 AM
    Yes, variable S on the second run has already a values of 4096 (because of the first run), so you keep adding another 4096 to it.
    29 replies | 834 view(s)
  • iz8dwf's Avatar
    August 3rd, 2017, 02:39 AM
    Well, quite right. On PETs the actual RAM (Row/Col) address multiplexers are 74153 chips (4 of them). 74LS244 are used (correctly) as bidirectional...
    29 replies | 813 view(s)
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