The 8032 PET uses a 100 Ohm resistor at a marginal 1/4 W rating in similar circuit (/NoROM). A 75 Ohm would dissipate 0.33 W if it was ever grounded....
It seems like the 6845 Motorola chip can do either interlace or non-interlace modes (Register 8) while the Commodore and early Rockwell 6545-1 chips...
Yes,
Mike had replaced the CRTC chip but only the Horizontal sync (20KHz) started working. We now verified that the Address and Data bus are working...
As far as problem 2, it should work, so maybe there is a mapping issue. Do you have the $9000 area properly mapped to the PET board if you are using...
After checking the address lines, check the eight data bus lines at the 6545 or at the expansion bus for obvious shorts and perhaps signals stuck at...
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