{"product_id":"destest-max-commodore-64-ram-diagnostic-cartridge","title":"DesTEST MAX Commodore 64 64c c128 Ram Diagnostic Cartridge","description":"\u003cp style=\"text-align: center;\"\u003e\u003cspan style=\"font-size: 30px;\"\u003e\u003cstrong\u003eToTs\u003c\/strong\u003e \u003c\/span\u003e\u003cstrong\u003e\u003cspan style=\"font-size: 30px;\"\u003e\u003cspan style=\"color: rgb(255, 0, 0);\"\u003eRETRO\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003cspan style=\"color: rgb(153, 0, 0); font-size: 30px;\"\u003e\u003cstrong\u003eCommodore 64 64c c128 c128D Ram Diagnostic Cartridge \u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eworks with commodore 64 and commodore 128\u003c\/strong\u003e\u003c\/p\u003e\u003cp style=\"text-align: center;\"\u003e\u003c\/p\u003e\u003cp style=\"text-align: center;\"\u003e\u003cspan style=\"color: rgb(11, 83, 148);\"\u003e\u003cstrong\u003e\u003cspan style=\"font-size: 30px;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-align: center;\"\u003e\u003cspan style=\"color: rgb(11, 83, 148);\"\u003e\u003cstrong\u003e\u003cspan style=\"font-size: 30px;\"\u003eDesTEST Max\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-align: center;\"\u003e\u003cspan style=\"color: rgb(11, 83, 148);\"\u003e\u003cstrong\u003e\u003cspan style=\"font-size: 30px;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-align: center;\"\u003e\u003cspan style=\"color: rgb(11, 83, 148); font-size: 30px;\"\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cspan style=\"font-size: 24px;\"\u003eNew Stronger Case Design\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cspan style=\"font-size: 24px;\"\u003eReset Button\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cspan style=\"font-size: 24px;\"\u003eColor Coded For Easy Recognition\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cspan style=\"font-size: 24px;\"\u003eMax Mode Operation\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\u003cp style=\"text-align: center;\"\u003e\u003cspan style=\"font-size: 24px;\"\u003e\u003cspan style=\"\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cspan style=\"font-size: 24px;\"\u003eMarch-B  Ram Testing Algorithm\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\u003cp style=\"text-align: center;\"\u003e\u003cspan style=\"color: rgb(11, 83, 148);\"\u003e\u003cstrong\u003e\u003cspan style=\"font-size: 30px;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-align: center;\"\u003e\u003cspan style=\"color: rgb(11, 83, 148);\"\u003e\u003cstrong\u003e\u003cspan style=\"font-size: 30px;\"\u003e\u003cbr\u003eFrom \u003cu\u003e\u003cem\u003efactorofmatt\u003c\/em\u003e\u003c\/u\u003e......\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-align: center;\"\u003e\u003cspan style=\"color: rgb(11, 83, 148);\"\u003e\u003cstrong\u003e\u003cspan style=\"font-size: 30px;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: inherit; margin: 0px; font-family: Montserrat, arial, sans-serif; font-size: 16px; background-color: rgb(255, 255, 255);\"\u003e\"The DesTestMAX project aims to improve upon Commodore’s Dead Test cartridge by using a more comprehensive memory test strategy and provide easier to interpret diagnostic output.\u003c\/p\u003e\u003cp style=\"box-sizing: inherit; margin: 0px; font-family: Montserrat, arial, sans-serif; font-size: 16px; background-color: rgb(255, 255, 255);\"\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: inherit; margin: 0px; font-family: Montserrat, arial, sans-serif; font-size: 16px; background-color: rgb(255, 255, 255);\"\u003eDesTestMAX utilizes the MAX (or ULTIMAX) cartridge mode as it allows us to place code directly in the $E000-$FFFF block of memory that gets executed as soon as the system resets. Such a situation allows the DesTestMAX code to take complete control of the system right from the get-go. Unlike the regular Commodore 64 boot process, DesTestMAX makes very few assumptions about the state of the machine and can produce usable results even with a severely broken machine.\u003c\/p\u003e\u003cp style=\"box-sizing: inherit; margin: 0px; font-family: Montserrat, arial, sans-serif; font-size: 16px; background-color: rgb(255, 255, 255);\"\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: inherit; margin: 0px; font-family: Montserrat, arial, sans-serif; font-size: 16px; background-color: rgb(255, 255, 255);\"\u003eThe 6510 CPU, VIC-II and PLA need to be functional, though the ROMs, CIAs and SID are not required and can be removed if socketed.\u003c\/p\u003e\u003cp style=\"box-sizing: inherit; margin: 0px; font-family: Montserrat, arial, sans-serif; font-size: 16px; background-color: rgb(255, 255, 255);\"\u003e\u003cbr style=\"box-sizing: inherit;\"\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: inherit; margin: 0px; font-family: Montserrat, arial, sans-serif; font-size: 16px; background-color: rgb(255, 255, 255);\"\u003eThe big drawback to MAX mode is that only the first 4K of system memory is available to the CPU.  DesTestMAX then can’t be a fully-comprehensive memory test, but it can be a great help when faced with a Commodore 64 that shows nothing but a black screen.\u003c\/p\u003e\u003cp style=\"box-sizing: inherit; margin: 0px; font-family: Montserrat, arial, sans-serif; font-size: 16px; background-color: rgb(255, 255, 255);\"\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: inherit; margin: 0px; font-family: Montserrat, arial, sans-serif; font-size: 16px; background-color: rgb(255, 255, 255);\"\u003eA DesTestMAX cartridge will also work in a Commodore 128. DesTestMAX will automatically run in ‘64 mode yet requires the ‘128 kernal, a working Z80 and a working MMU. The VDC is not required.\u003c\/p\u003e\u003cp style=\"box-sizing: inherit; margin: 0px; font-family: Montserrat, arial, sans-serif; font-size: 16px; background-color: rgb(255, 255, 255);\"\u003e\u003cbr style=\"box-sizing: inherit;\"\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: inherit; margin: 0px; font-family: Montserrat, arial, sans-serif; font-size: 16px; background-color: rgb(255, 255, 255);\"\u003eDesTestMAX utilizes the March-B memory test algorithm which can detect a wide range of memory errors including bad bits and page errors.  Good care has been taken to ensure that no assumptions are made about the validity of memory before it has been tested. Neither Zero Page nor the Stack are used before those two memory regions have been verified since errors in either could cause havoc with the running code.  The full 4K memory-test takes about 10 seconds and verifies all but the first 2 bytes of memory all in one go.\"\u003c\/p\u003e\u003cp style=\"text-align: center;\"\u003e\u003c\/p\u003e\u003cp style=\"text-align: center;\"\u003e\u003cspan style=\"color: rgb(11, 83, 148);\"\u003e\u003cstrong\u003e\u003cspan style=\"font-size: 28px;\"\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-align: center;\"\u003e\u003c\/p\u003e\u003cp style=\"text-align: center;\"\u003eDimensions: 68.8 x 54.1 x 21.1mm\u003c\/p\u003e\u003cp style=\"text-align: center;\"\u003eWeight: ~48.5grams\u003c\/p\u003e\u003cp style=\"text-align: center;\"\u003eColor: Teal Tool\u003c\/p\u003e\u003cp style=\"text-align: center;\"\u003eGuaranteed tested and working when Shipped to you. \u003c\/p\u003e\u003cp style=\"text-align: center;\"\u003e\u003c\/p\u003e\u003cp style=\"text-align: center;\"\u003e\u003c\/p\u003e\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cem\u003e\u003cu\u003eSold From USA, PHOENIX AZ\u003c\/u\u003e\u003c\/em\u003e\u003c\/strong\u003e\u003c\/p\u003e\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cem\u003e\u003cu\u003eAny Questions, do not hesitate to ASK. \u003c\/u\u003e\u003c\/em\u003e\u003c\/strong\u003e\u003c\/p\u003e\u003cp style=\"text-align: center;\"\u003e\u003c\/p\u003e\u003cp style=\"text-align: center;\"\u003e\u003c\/p\u003e","brand":"ToTsRC\/ToTsRETRO","offers":[{"title":"Default Title","offer_id":48898441150707,"sku":"IF_04DAF624","price":25.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0619\/5239\/3459\/files\/destest-max.png?v=1777667646","url":"https:\/\/totsrc.com\/products\/destest-max-commodore-64-ram-diagnostic-cartridge","provider":"ToTsRC\/ToTsRETRO","version":"1.0","type":"link"}