{"id":841,"date":"2015-04-01T00:21:51","date_gmt":"2015-03-31T15:21:51","guid":{"rendered":"http:\/\/nekokabu.s7.xrea.com\/blog\/?p=841"},"modified":"2020-05-11T02:02:46","modified_gmt":"2020-05-10T17:02:46","slug":"64drive%e3%81%a764dd%e3%82%92%e3%82%b5%e3%83%9d%e3%83%bc%e3%83%88","status":"publish","type":"post","link":"http:\/\/nekokabu.s7.xrea.com\/blog\/2015\/04\/20150401002151-841.html","title":{"rendered":"64drive\u306764DD\u3092\u30b5\u30dd\u30fc\u30c8"},"content":{"rendered":"\n<div class=\"twitter-share\"><a href=\"https:\/\/twitter.com\/intent\/tweet\" class=\"twitter-share-button\">\u30c4\u30a4\u30fc\u30c8<\/a><\/div>\n<p>64drive\u306e\u6b21\u671f\u30d0\u30fc\u30b8\u30e7\u30f3\u306e\u30d5\u30a1\u30fc\u30e0\u30a6\u30a7\u30a23.0\u306b\u306664DD\u3092\u30b5\u30dd\u30fc\u30c8\u3059\u308b\u3088\u3046\u3067\u3059\u3002<\/p>\n<p><!--more--><\/p>\n<p>N64\u306e\u6539\u9020\u7b49\u3067\u8457\u540d\u306aZoinkity\u6c0f\u304cYouTube\u306b\u516c\u958b\u3057\u305f\u52d5\u753b\u306b\u3088\u308b\u3068<br \/>\n64drive\u306e\u6b21\u671f\u30d0\u30fc\u30b8\u30e7\u30f3\u306e\u30d5\u30a1\u30fc\u30e0\u30a6\u30a7\u30a23.0\u306b\u306664DD\u306e\u30c7\u30a3\u30b9\u30af\u30a4\u30e1\u30fc\u30b8\u3092<br \/>\n\u30b5\u30dd\u30fc\u30c8\u3059\u308b\u3088\u3046\u3067\u3059\u3002<\/p>\n<p><iframe loading=\"lazy\" width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/xHR1y4OJ4lE\" frameborder=\"0\" allowfullscreen><\/iframe><\/p>\n<blockquote><p>This is a preview of 64drive firmware 3.00, adding 64DD support. The FPGA simulates the ASIC registers, based in large part on Happy&#8217;s work in MESS.<br \/>\nThere isn&#8217;t enough on-board memory to keep the IPL and disk image loaded at the same time, and trying to load the disk info using SD\/CF LBAs was fraught with errors. Instead, disk images are placed in cart space and the IPL is read-only, accessed much like save files, for games using the sound and font data.<\/p>\n<p>My contribution is a custom bootstrap replacing IPL 2 and 3 in the boot sequence. Just like a cart bootstrap it initializes the system, but also applies disk initialization found only in the DD bootloader. The disk is loaded directly without any IPL code executing.<\/p>\n<p>There are some kinks. Writes are not flushed back to SD\/CF but are written to cart space, so just like with the Dezaemon DD cart mod you can upload them to PC using USB. Expansion disks can&#8217;t be run with a cart base, and disk swapping isn&#8217;t really supported. You can upload a new image via USB, but the eject and disk change flags are not set by the FPGA yet. That would require active monitoring or possibly a trigger, but should be the easiest problem to solve.<\/p><\/blockquote>\n<p>64DD\u306e\u5438\u3044\u51fa\u3057\u304c\u53ef\u80fd\u306b\u306a\u3063\u3066\u304b\u3089<br \/>\n\u3059\u3054\u3044\u52e2\u3044\u3067\u3044\u308d\u3044\u308d\u306a\u3082\u306e\u306e\u958b\u767a\u304c\u9032\u3093\u3067\u3044\u307e\u3059\u3002<br \/>\n\u3061\u3087\u3063\u3068\u611f\u52d5\u3092\u899a\u3048\u307e\u3059\u306d\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>64drive\u306e\u6b21\u671f\u30d0\u30fc\u30b8\u30e7\u30f3\u306e\u30d5\u30a1\u30fc\u30e0\u30a6\u30a7\u30a23.0\u306b\u306664DD\u3092\u30b5\u30dd\u30fc\u30c8\u3059\u308b\u3088\u3046\u3067\u3059\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[46,48,42],"class_list":["post-841","post","type-post","status-publish","format-standard","hentry","category-n64","tag-64dd","tag-64drive","tag-n64"],"_links":{"self":[{"href":"http:\/\/nekokabu.s7.xrea.com\/blog\/wp-json\/wp\/v2\/posts\/841","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/nekokabu.s7.xrea.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/nekokabu.s7.xrea.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/nekokabu.s7.xrea.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/nekokabu.s7.xrea.com\/blog\/wp-json\/wp\/v2\/comments?post=841"}],"version-history":[{"count":2,"href":"http:\/\/nekokabu.s7.xrea.com\/blog\/wp-json\/wp\/v2\/posts\/841\/revisions"}],"predecessor-version":[{"id":843,"href":"http:\/\/nekokabu.s7.xrea.com\/blog\/wp-json\/wp\/v2\/posts\/841\/revisions\/843"}],"wp:attachment":[{"href":"http:\/\/nekokabu.s7.xrea.com\/blog\/wp-json\/wp\/v2\/media?parent=841"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/nekokabu.s7.xrea.com\/blog\/wp-json\/wp\/v2\/categories?post=841"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/nekokabu.s7.xrea.com\/blog\/wp-json\/wp\/v2\/tags?post=841"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}