Finally back from Sweden. There were quite a few packages waiting for me! Unfortunately, the TMS40L45 wasn’t one of them, so I couldn’t start work on the CPU board.<\/p>\n
Or so I tought…<\/p>\n
I started Leon’s test EPROM again and started testing all the outputs since I skipped over that test to find out if the memories where good. Well, I found two 3081 chips that are dead… that kind of explains why the LED on the soundboard always comes on when I attach it to the CPU board. So I’ve ordered a couple of those 3081’s and they should be here in a couple of days.<\/p>\n
I also saw that all the signals on the CN14 connector for the displays were there, so I started fooling around with the idea of writing a little program to see if the displays still work. I guess I can’t wait for the CPU board to be fixed so I can use the built in tests. And it does keep me out of other trouble \ud83d\ude09<\/p>\n
Anyway, I’m waiting for my EPROM to be erased to put the 3rd try on it. I have a good feeling this time… But then again, I had a good feeling every time.<\/p>\n
If it works, I’ll let you know and post the program and some pictures.<\/p>\n","protected":false},"excerpt":{"rendered":"
Finally back from Sweden. There were quite a few packages waiting for me! Unfortunately, the TMS40L45 wasn’t one of them, so I couldn’t start work on the CPU board. Or so I tought… I started Leon’s test EPROM again and started testing all the outputs since I skipped over that test to find out if […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3,46],"tags":[15,30,12,19,25,8,14,31,24],"class_list":["post-90","post","type-post","status-publish","format-standard","hentry","category-electronics","category-pinball-champ","tag-cpu","tag-display","tag-electronics-2","tag-eprom","tag-memory","tag-pinball-2","tag-sound","tag-test-program","tag-zaccaria"],"_links":{"self":[{"href":"https:\/\/pinball.teta.be\/index.php?rest_route=\/wp\/v2\/posts\/90","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pinball.teta.be\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/pinball.teta.be\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/pinball.teta.be\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/pinball.teta.be\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=90"}],"version-history":[{"count":4,"href":"https:\/\/pinball.teta.be\/index.php?rest_route=\/wp\/v2\/posts\/90\/revisions"}],"predecessor-version":[{"id":227,"href":"https:\/\/pinball.teta.be\/index.php?rest_route=\/wp\/v2\/posts\/90\/revisions\/227"}],"wp:attachment":[{"href":"https:\/\/pinball.teta.be\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=90"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/pinball.teta.be\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=90"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/pinball.teta.be\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=90"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}