Colin Haynes<p>Commodore PET 4016 upgraded to 32k. Refurbished with fantastic help from here:</p><p><a href="https://www.vintage-radio.net/forum/showthread.php?t=218958" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">vintage-radio.net/forum/showth</span><span class="invisible">read.php?t=218958</span></a></p><p>I got help which included the creation of a 6502 zero page RAM tester that didn't exist for PETs - 45 years after the PET was made. </p><p>Several chips replaced including most of the RAM and four out of five of the 40 pin chips. And a new label applied as the old one had gone. </p><p>Thanks very much to <span class="h-card" translate="no"><a href="https://mastodon.scot/@simon_brooke" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>simon_brooke</span></a></span> for letting me have it. </p><p><a href="https://mastodon.scot/tags/commodore" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>commodore</span></a> <a href="https://mastodon.scot/tags/commodorepet" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>commodorepet</span></a> <a href="https://mastodon.scot/tags/6502coding" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>6502coding</span></a> <a href="https://mastodon.scot/tags/vintagecomputing" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>vintagecomputing</span></a></p>