tkc8800<\/a> I was able to make a couple of plug in adapters so I can use the bottom half of two 2716s to replace the 2708s.<\/p>\nI have now put Nassys3 in the two 2716s and tried that.<\/p>\n
Still the same… Arrgghhh!<\/p>\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
Having checked the clocks and finding things look well, it’s time to see if the ROMs are OK. The Nascom uses 2708 EPROMs. These are 1k by 8 bits and must have been one of the first EPROMs available. The problem with them is that they need three different voltage rails and most modern EPROM … Continue reading RetroChallenge 2017\/10 \u2013 More things it’s not<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_coblocks_attr":"","_coblocks_dimensions":"","_coblocks_responsive_height":"","_coblocks_accordion_ie_support":"","footnotes":""},"categories":[47,129,33,98,127],"tags":[],"class_list":["post-1255","post","type-post","status-publish","format-standard","hentry","category-c93-blog-posts","category-nascom-1","category-c84-retro-tech","category-retrochallenge","category-retrochallenge-201710"],"featured_image_src":null,"author_info":{"display_name":"andy","author_link":"https:\/\/www.randomorbit.co.uk\/?author=1"},"_links":{"self":[{"href":"https:\/\/www.randomorbit.co.uk\/index.php?rest_route=\/wp\/v2\/posts\/1255","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.randomorbit.co.uk\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.randomorbit.co.uk\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.randomorbit.co.uk\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.randomorbit.co.uk\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1255"}],"version-history":[{"count":3,"href":"https:\/\/www.randomorbit.co.uk\/index.php?rest_route=\/wp\/v2\/posts\/1255\/revisions"}],"predecessor-version":[{"id":1261,"href":"https:\/\/www.randomorbit.co.uk\/index.php?rest_route=\/wp\/v2\/posts\/1255\/revisions\/1261"}],"wp:attachment":[{"href":"https:\/\/www.randomorbit.co.uk\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1255"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.randomorbit.co.uk\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1255"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.randomorbit.co.uk\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1255"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
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<\/a>I can program 2716s however as these only need a single 5V rail and thanks to tkc8800<\/a> I was able to make a couple of plug in adapters so I can use the bottom half of two 2716s to replace the 2708s.<\/p>\n