{"title":"DesTEST Series Cartridges","description":"\u003cp\u003eHere you will find the latest things of Factor of Matt to Explore, Find the one you want to order and Play with it on your Retro Computer.  Revolutionary Test Cartridges for the Commodore 64 and Commodore 128.\u003c\/p\u003e","products":[{"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"},{"product_id":"destest-full-commodore-64-64c-c128-ram-diagnostic-cartridge","title":"DesTEST FULL 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\u003cstrong\u003e\u003cspan style=\"color: rgb(19, 79, 92);\"\u003e\u003cspan style=\"font-size: 30px;\"\u003eDesTEST FULL \u003cem\u003e\u003cspan style=\"font-size: 16px;\"\u003e(Full 64k c64 Memory Test)\u003c\/span\u003e\u003c\/em\u003e\u003c\/span\u003e\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); 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;\"\u003eMarch-B  Ram Testing Algorithm Tests All 64k\u003c\/span\u003e\u003c\/strong\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;\"\u003e\u003cbr\u003e\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 DesTest 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\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\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 DestTestFull solution can test the entire 64K of available memory in your Commodore 64 using the same March-B algorithm as the DesTestMAX 4K testing cartridge.\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);\"\u003eWhile your Commodore 64 doesn’t need to be fully working in order to run DesTestFull, the CPU, VIC-II, PLA, kernal ROM and the stack-page memory ($1F0-$1FF) must be functional. The basic ROM, character ROM, SID and CIAs are 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);\"\u003eA DesTestFull cartridge will also work in a Commodore 128. Though in addition to the working parts listed for the C64 above, a C128 will also require a working Z80 and MMU.\"\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":48898452914419,"sku":"IF_7FF178B9","price":25.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0619\/5239\/3459\/files\/destest-full.png?v=1777667646"},{"product_id":"destest-full-commodore-64-64c-c128-ram-diagnostic-cartridge-copy","title":"DesTEST Switch v2 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\n\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\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eworks with commodore 64 and commodore 128\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cspan style=\"color: rgb(19, 79, 92);\"\u003e\u003cspan style=\"font-size: 30px;\"\u003eDesTEST Switch v2 \u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2 style=\"text-align: center;\"\u003e\u003cspan\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cspan\u003eGold Plated Contacts\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cspan\u003eENIG PCB\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cspan\u003eReset Button w\/LED's\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cspan\u003eMax Mode Operation\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cspan\u003eand Full 64k Mode Operation\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cspan\u003eMarch-B  Ram Testing Algorithm\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cspan\u003eNo Dependence on the ROM's, CIA's or SID\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cspan\u003eROM checksum verification (if installed)\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cspan\u003eCIA TOD consistency verification\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan\u003e\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e\u003cbr\u003eFrom \u003cu\u003e\u003cem\u003efactorofmatt\u003c\/em\u003e\u003c\/u\u003e......\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch1 role=\"heading\" aria-level=\"1\" data-ux=\"ContentHeading\" data-aid=\"CONTENT_MEDIA_HEADLINE1_RENDERED\" data-promoted-from=\"4\" data-order=\"0\" data-typography=\"HeadingDelta\" class=\"x-el x-el-h1 c1-1 c1-2 c1-1m c1-1n c1-87 c1-31 c1-32 c1-25 c1-v c1-4x c1-78 c1-88 c1-u c1-b c1-89 c1-7c c1-3r c1-7d c1-7f c1-7g c1-7h\"\u003eDesTest MAX-Switch\u003c\/h1\u003e\n\u003cdiv data-ux=\"ContentText\" data-aid=\"CONTENT_MEDIA_DESCRIPTION1_RENDERED\" data-typography=\"BodyAlpha\" class=\"x-el c1-1 c1-2 c1-1m c1-1n c1-4d c1-25 c1-v c1-50 c1-8a c1-8b c1-8c c1-8d c1-8e c1-8f c1-8g c1-8h c1-8i c1-8j c1-8k c1-8l c1-8m c1-8n c1-8o c1-8p c1-8q c1-8r c1-8s c1-8t c1-8u c1-8v c1-8w c1-8x c1-8y c1-8z c1-90 c1-91 c1-92 c1-93 c1-94 c1-95 c1-2z c1-b c1-96 c1-c c1-3r c1-d c1-e c1-f c1-g x-rt\"\u003e\n\u003cp\u003e\u003cspan\u003eThe MAX-mode of the C64 expansion-port is truly a marvel since it allows the program on the cartridge to run right from the get-go bypassing the kernal and its assumptions about working memory.  This convenience, however, comes at a cost:  All but the bottom 4K of memory plus the kernal, BASIC and character ROMs are not available.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThat's why DesTestMAX only tests 4K!  That's all it can test.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe DesTest MAX-Switch (or just the 'Switch) solution aims to fix this limitation!\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe custom DesTest MAX-Switch cartridge adds the capability to switch (hence the name) between the MAX-mode and regular cartridge-mode under program control.  The new DesTest Software allows the following features:\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFull 64K memory test using the March-B algorithm.\u003c\/li\u003e\n\u003cli\u003eNo dependence on the ROMs, CIAs or SID: they can be removed.\u003c\/li\u003e\n\u003cli\u003eROM checksum verification (if installed).\u003c\/li\u003e\n\u003cli\u003eCIA TOD consistency verification.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eThe DesTest MAX-Switch hardware includes provisions for the following:\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePower LED.  Most of the time when diagnosing or repairing a C64, the keyboard is removed along with the Power LED.  The DesTest MAX-Switch cartridge includes a simple power LED to avoid mistakes like removing or inserting ICs with the power on.\u003c\/li\u003e\n\u003cli\u003eReset Switch and LED.  A faulty reset-circuit in a C64 can prevent it starting-up properly.  A reset-switch can temporarily bypass a faulty reset-circuit and the LED gives a visual indication if something is wrong!\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"text-align: center;\"\u003eDimensions: 58 x 49 x 11.33mm\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003eWeight: ~22.5grams\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003eColor: Black\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003eGuaranteed tested and working when Shipped to you. \u003c\/p\u003e\n\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\n\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\n\u003cp style=\"text-align: center;\"\u003eCheck out the switch in action ....\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/wfv_J3iYPNI?si=8U_z9GWmVVR1LLwn\u0026amp;start=44\" title=\"YouTube video player\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e \u003c\/p\u003e","brand":"ToTsRC\/ToTsRETRO","offers":[{"title":"Default Title","offer_id":49107241926899,"sku":"DS_Switchv2","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0619\/5239\/3459\/files\/DesTestSwitchFront.png?v=1779407586"},{"product_id":"destest-switch-v2-commodore-64-64c-c128-ram-diagnostic-cartridge-copy","title":"DesTEST Switch v2 w\/CASE 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\n\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\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eworks with commodore 64 and commodore 128\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cspan style=\"color: rgb(19, 79, 92);\"\u003e\u003cspan style=\"font-size: 30px;\"\u003eDesTEST Switch v2 w\/CASE\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2 style=\"text-align: center;\"\u003e\n\u003cspan\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/span\u003e\n\u003c\/h2\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cspan\u003eNew Design Case - Improved Durability and Long Life\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cspan\u003eGold Plated Contacts\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cspan\u003eENIG PCB\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cspan\u003eReset Button w\/LED's\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cspan\u003eMax Mode Operation\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cspan\u003eand Full 64k Mode Operation\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cspan\u003eMarch-B  Ram Testing Algorithm\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cspan\u003eNo Dependence on the ROM's, CIA's or SID\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cspan\u003eROM checksum verification (if installed)\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cspan\u003eCIA TOD consistency verification\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan\u003e\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e\u003cbr\u003eFrom \u003cu\u003e\u003cem\u003efactorofmatt\u003c\/em\u003e\u003c\/u\u003e......\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch1 role=\"heading\" aria-level=\"1\" data-ux=\"ContentHeading\" data-aid=\"CONTENT_MEDIA_HEADLINE1_RENDERED\" data-promoted-from=\"4\" data-order=\"0\" data-typography=\"HeadingDelta\" class=\"x-el x-el-h1 c1-1 c1-2 c1-1m c1-1n c1-87 c1-31 c1-32 c1-25 c1-v c1-4x c1-78 c1-88 c1-u c1-b c1-89 c1-7c c1-3r c1-7d c1-7f c1-7g c1-7h\"\u003eDesTest MAX-Switch\u003c\/h1\u003e\n\u003cdiv data-ux=\"ContentText\" data-aid=\"CONTENT_MEDIA_DESCRIPTION1_RENDERED\" data-typography=\"BodyAlpha\" class=\"x-el c1-1 c1-2 c1-1m c1-1n c1-4d c1-25 c1-v c1-50 c1-8a c1-8b c1-8c c1-8d c1-8e c1-8f c1-8g c1-8h c1-8i c1-8j c1-8k c1-8l c1-8m c1-8n c1-8o c1-8p c1-8q c1-8r c1-8s c1-8t c1-8u c1-8v c1-8w c1-8x c1-8y c1-8z c1-90 c1-91 c1-92 c1-93 c1-94 c1-95 c1-2z c1-b c1-96 c1-c c1-3r c1-d c1-e c1-f c1-g x-rt\"\u003e\n\u003cp\u003e\u003cspan\u003eThe MAX-mode of the C64 expansion-port is truly a marvel since it allows the program on the cartridge to run right from the get-go bypassing the kernal and its assumptions about working memory.  This convenience, however, comes at a cost:  All but the bottom 4K of memory plus the kernal, BASIC and character ROMs are not available.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThat's why DesTestMAX only tests 4K!  That's all it can test.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe DesTest MAX-Switch (or just the 'Switch) solution aims to fix this limitation!\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe custom DesTest MAX-Switch cartridge adds the capability to switch (hence the name) between the MAX-mode and regular cartridge-mode under program control.  The new DesTest Software allows the following features:\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFull 64K memory test using the March-B algorithm.\u003c\/li\u003e\n\u003cli\u003eNo dependence on the ROMs, CIAs or SID: they can be removed.\u003c\/li\u003e\n\u003cli\u003eROM checksum verification (if installed).\u003c\/li\u003e\n\u003cli\u003eCIA TOD consistency verification.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eThe DesTest MAX-Switch hardware includes provisions for the following:\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePower LED.  Most of the time when diagnosing or repairing a C64, the keyboard is removed along with the Power LED.  The DesTest MAX-Switch cartridge includes a simple power LED to avoid mistakes like removing or inserting ICs with the power on.\u003c\/li\u003e\n\u003cli\u003eReset Switch and LED.  A faulty reset-circuit in a C64 can prevent it starting-up properly.  A reset-switch can temporarily bypass a faulty reset-circuit and the LED gives a visual indication if something is wrong!\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"text-align: center;\"\u003eDimensions: 64 x 50x 18.5 mm\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003eWeight: ~51grams\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003eColor: Tool Teal\/Black\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003eGuaranteed tested and working when Shipped to you. \u003c\/p\u003e\n\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\n\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\n\u003cp style=\"text-align: center;\"\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003eCheck out the Switch in action ....\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/wfv_J3iYPNI?si=8U_z9GWmVVR1LLwn\u0026amp;start=44\" title=\"YouTube video player\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e","brand":"ToTsRC\/ToTsRETRO","offers":[{"title":"Default Title","offer_id":49107930775795,"sku":"DS_Switchv2CASE","price":44.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0619\/5239\/3459\/files\/DesTestSwitchwcase.png?v=1779407585"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0619\/5239\/3459\/collections\/Factor_of_Matt.png?v=1780930392","url":"https:\/\/totsrc.com\/collections\/factor-of-matt-destest-series\/c64u.oembed","provider":"ToTsRC\/ToTsRETRO","version":"1.0","type":"link"}