{"id":1267,"date":"2017-10-22T20:16:52","date_gmt":"2017-10-22T19:16:52","guid":{"rendered":"http:\/\/www.randomorbit.co.uk\/?p=1267"},"modified":"2017-10-22T20:16:52","modified_gmt":"2017-10-22T19:16:52","slug":"retrochallenge-201710-more-clues-but-what-do-they-mean","status":"publish","type":"post","link":"https:\/\/www.randomorbit.co.uk\/?p=1267","title":{"rendered":"RetroChallenge 2017\/10 \u2013 More clues but what do they mean?"},"content":{"rendered":"

So here we are, two thirds of the way through the month and the Nascom-1 is looking just as it did when I started \ud83d\ude42<\/p>\n

But now, take a look at this picture…\"\"<\/a><\/p>\n

This is the Nascom with a ROM in it that fills the screen with NULLs. I’ve just pressed reset.<\/p>\n

\n

Now look at this photo…<\/p>\n

\"\"<\/a>This is a different ROM. This\u00a0 one fills the screen with ‘*’s. Again I’ve just pressed reset.<\/p>\n

Their behaviour with these ROMs after reset is pretty consistant but not guaranteed.<\/p>\n

But what does it mean?<\/h2>\n

I don’t know, but I’m sure it means something. It could mean I’ve mucked up the ROMs. As 2708s are hard to find and program, I’m using a 2716 in a little adapter that I made myself but they look fine.<\/p>\n

With the alternative ROMs in place, we’re only using the screen RAM and the addressing logic, buffers etc.<\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

So here we are, two thirds of the way through the month and the Nascom-1 is looking just as it did when I started \ud83d\ude42 But now, take a look at this picture… This is the Nascom with a ROM in it that fills the screen with NULLs. I’ve just pressed reset. Now look at … Continue reading RetroChallenge 2017\/10 \u2013 More clues but what do they mean?<\/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":[47,33],"tags":[],"class_list":["post-1267","post","type-post","status-publish","format-standard","hentry","category-c93-blog-posts","category-c84-retro-tech"],"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\/1267","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=1267"}],"version-history":[{"count":1,"href":"https:\/\/www.randomorbit.co.uk\/index.php?rest_route=\/wp\/v2\/posts\/1267\/revisions"}],"predecessor-version":[{"id":1270,"href":"https:\/\/www.randomorbit.co.uk\/index.php?rest_route=\/wp\/v2\/posts\/1267\/revisions\/1270"}],"wp:attachment":[{"href":"https:\/\/www.randomorbit.co.uk\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1267"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.randomorbit.co.uk\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1267"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.randomorbit.co.uk\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1267"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}