{"id":12,"date":"2020-04-18T20:18:20","date_gmt":"2020-04-18T20:18:20","guid":{"rendered":"http:\/\/hindsbo.dk\/blog\/?p=12"},"modified":"2020-05-10T00:46:52","modified_gmt":"2020-05-10T00:46:52","slug":"6502-homebrev-overview","status":"publish","type":"post","link":"http:\/\/hindsbo.dk\/blog\/?p=12","title":{"rendered":"6502 Homebrev Overview"},"content":{"rendered":"\n<p>Below is the full schematic of my 6502 homebrew computer, as it stands today. I have a couple of expansions in mind, incl. RS232 serial interface, that is not yet hooked up. The main components are:<\/p>\n\n\n\n<ul><li>CPU &#8211; <a href=\"https:\/\/www.mouser.com\/ProductDetail\/Western-Design-Center-WDC\/W65C02S6TPG-14?qs=sGAEpiMZZMtVFuKNr6IGvpdkwXR9vVB1\">W65C02 <\/a>processor (IC1)<\/li><li>32K ROM &#8211; <a href=\"https:\/\/www.mouser.com\/ProductDetail\/Microchip-Technology-Atmel\/AT28C256-15PU?qs=sGAEpiMZZMuVhdAcoizlRSQWn4iDi6Wf2J%252BONJX6vDw%3D\">AT28C256 15PU<\/a> EEPROM (IC2)<\/li><li>32K RAM &#8211; <a href=\"https:\/\/www.mouser.com\/Alliance-Memory\/Semiconductors\/Memory-ICs\/SRAM\/_\/N-4bzpt?P=1yzay1oZ1yzswq7Z1z0z63x&amp;Keyword=256k+SRAM&amp;FS=True\">HM62256B <\/a>or similar (IC3)<\/li><li>Address Decoder &#8211; <a href=\"https:\/\/www.mouser.com\/ProductDetail\/Microchip-Technology-Atmel\/AT28C64B-15PU?qs=%2Fha2pyFaduiLcdmqO9imlXGpVAHe6UHfM%2F%2FKhu1ZrmA%3D\">AT28C64B <\/a>EEPROM (IC4) <\/li><li>I\/O Controller &#8211; <a href=\"https:\/\/www.mouser.com\/ProductDetail\/Western-Design-Center-WDC\/W65C22N6TPG-14?qs=sGAEpiMZZMsYdxaYtmOicSRUuPiX8JOOAWyKaG%252Be%2Fco%3D\">W65C22 <\/a>VIA (IC5)<\/li><li>SPI buffer chip &#8211; <a href=\"https:\/\/www.mouser.com\/ProductDetail\/Texas-Instruments\/SN74HC125N?qs=sGAEpiMZZMuiiWkaIwCK2WAncryyStC71zUy8BBCvLc%3D\">SN74HC125N<\/a> (IC11)<\/li><li><a href=\"https:\/\/www.mouser.com\/ProductDetail\/mikroe\/mikroe-3\/?qs=jBNCx3lXxWtKrT085MRdDA%3D%3D&amp;countrycode=US&amp;currencycode=USD\">MIKROE-3 <\/a>SD board (connected to SPI (J1))<\/li><li>LCD 20&#215;4 <a href=\"https:\/\/www.mouser.com\/ProductDetail\/gravitech\/lcd-20x4y\/?qs=Vxac6xGyzPnjZjlBU%2FMUhQ%3D%3D&amp;countrycode=US&amp;currencycode=USD\">Display <\/a>(DS1)<\/li><li><a href=\"https:\/\/www.mouser.com\/ProductDetail\/Texas-Instruments\/SN74HC245AN?qs=sGAEpiMZZMutXGli8Ay4kKXolc%252BuJcYSfuHdg2Zj99E%3D\">74HC245 <\/a>Bus Transceiver for display (IC13)  <\/li><li> <a href=\"https:\/\/www.mouser.com\/ProductDetail\/Texas-Instruments\/SN74HC574N?qs=sGAEpiMZZMvxP%252Bvr8KwMwBnwYCvkZxeQoMRe0GOGaSg%3D\">74HC574N  <\/a>Flip-Flop for connecting buttons (IC12)<\/li><li><a href=\"https:\/\/www.mouser.com\/ProductDetail\/western-design-center-wdc\/w65c51n6tpg-14\/?qs=AgbsAOSw7WDdUCKSkUixbw%3D%3D&amp;countrycode=US&amp;currencycode=USD\">W65C51 <\/a>Asynch Comms (coming)<\/li><li><a href=\"https:\/\/www.mouser.com\/ProductDetail\/texas-instruments\/max232n\/?qs=5BZzbFV4k2vm92DEZa5XUA%3D%3D&amp;countrycode=US&amp;currencycode=USD\">MAX232 <\/a>RS-232 driver (coming) <\/li><li>X MHz <a href=\"https:\/\/www.mouser.com\/ProductDetail\/cts\/mxo45-3c-2m0000\/?qs=hbgUSdfWRJVCM8WDm293Vw%3D%3D&amp;countrycode=US&amp;currencycode=USD\">Clock Oscillator <\/a>(X1)<\/li><li><a href=\"https:\/\/www.mouser.com\/ProductDetail\/maxim-integrated\/ds1813-10+\/?qs=Jw2w9zrI6w83YXuUo6T%2F0Q%3D%3D&amp;countrycode=US&amp;currencycode=USD\">DS1813-10<\/a> Reset circuit (X2) <\/li><li><a href=\"https:\/\/www.mouser.com\/ProductDetail\/Texas-Instruments\/SN74HC00N?qs=sGAEpiMZZMtMa9lbYwD6ZOuZLcSXNpUa2xCbYHJFs%2FQ%3D\">74HC00N <\/a>NAND gates for misc glue logic (IC10)  <\/li><\/ul>\n\n\n\n<p>I will go into more detail on sub-components in future blog posts and later also on the programming\/code. <\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" width=\"1024\" height=\"715\" src=\"http:\/\/hindsbo.dk\/blog\/wp-content\/uploads\/2020\/04\/Overall-Scematic-18042020-1024x715.png\" alt=\"\" class=\"wp-image-13\" srcset=\"http:\/\/hindsbo.dk\/blog\/wp-content\/uploads\/2020\/04\/Overall-Scematic-18042020-1024x715.png 1024w, http:\/\/hindsbo.dk\/blog\/wp-content\/uploads\/2020\/04\/Overall-Scematic-18042020-300x209.png 300w, http:\/\/hindsbo.dk\/blog\/wp-content\/uploads\/2020\/04\/Overall-Scematic-18042020-768x536.png 768w, http:\/\/hindsbo.dk\/blog\/wp-content\/uploads\/2020\/04\/Overall-Scematic-18042020.png 1403w\" sizes=\"(max-width: 767px) 89vw, (max-width: 1000px) 54vw, (max-width: 1071px) 543px, 580px\" \/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Below is the full schematic of my 6502 homebrew computer, as it stands today. I have a couple of expansions in mind, incl. RS232 serial interface, that is not yet hooked up. The main components are: CPU &#8211; W65C02 processor (IC1) 32K ROM &#8211; AT28C256 15PU EEPROM (IC2) 32K RAM &#8211; HM62256B or similar (IC3) &hellip; <\/p>\n<p class=\"link-more\"><a href=\"http:\/\/hindsbo.dk\/blog\/?p=12\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;6502 Homebrev Overview&#8221;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[4],"tags":[2,3],"_links":{"self":[{"href":"http:\/\/hindsbo.dk\/blog\/index.php?rest_route=\/wp\/v2\/posts\/12"}],"collection":[{"href":"http:\/\/hindsbo.dk\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/hindsbo.dk\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/hindsbo.dk\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/hindsbo.dk\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=12"}],"version-history":[{"count":2,"href":"http:\/\/hindsbo.dk\/blog\/index.php?rest_route=\/wp\/v2\/posts\/12\/revisions"}],"predecessor-version":[{"id":15,"href":"http:\/\/hindsbo.dk\/blog\/index.php?rest_route=\/wp\/v2\/posts\/12\/revisions\/15"}],"wp:attachment":[{"href":"http:\/\/hindsbo.dk\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=12"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/hindsbo.dk\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=12"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/hindsbo.dk\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=12"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}