OpenC64Cart V2 (8K)

Thank you so much, Sukko for making this cartridge PCB. I was successful in getting an 8K game cartridge made with it. A small problem I noticed was that sometimes the cartridge does not start on my Commodore 128 until I press the reset button. Doesn't happen every time. Could this be the use of the 104 (100nf) capacitor causing too great a delay in the startup?

Hi photoman, I think the dead test cartridge takes some time before it the black screen disappears. I think it does some low level testing. When you program the chip make sure you fill up the full 8kb memory range. You can use any area of the chip so long as it is spaced (addressed) in multiples of 8kb from the start of the chip. Someone please correct me if I am wrong, the first cartridge image should be from 0000 to 4000 hex values. Grab an online hex to Dec calculator ap to help make the 8kb steps. Follow Sukkopera's very detailed documentation. I think the dead test needs to be in Ultimax mode. Good luck😁.

Hi, I'm trying to program a system, but the cartridge doesn't start. I have a black screen. From what memory address 27c512 should I program "Dead Test"?

Very easy to build. I do have one problem, I can't get it to work with the dead test bin. It works great with the diagnostics bin.

What is that to the left of the 27c512 on the board? I didn't see it mentioned in the readme on github nor can I read it on the pictures posted here.

Here is the slight ridge in the manufactured boards that need to be sanded flat for the cartridge to be inserted . I think the only real way to tell is to rub your finger across the surface to feel for the slight bump. Initially I couldn't figure out why the cartridge wasn't inserting into the C64's cartridge slot. It is not hard to sand it down and it doesn't take very long at all. If you don't do it it basically won't slot in. I suggest forcing is not advisable due to the aging plastics on the cartridge connector of the c64.

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Hi Sukko Perra, I have built your Open C64 8kb cartridge. It works very well. Soldering was easy to do on this well laid out board. I chose to have the board made in white this time - looks very nice. The cartridge fits in snugly. There is a slight ridge created in the manufacturing process. This was easily sanded down using a nail file. It is barely perceptible, however it will not alow the cartrige to be inserted into the C64 untill it is sanded down. I suggest have PCBWAY shamfer the board edges for a better finish. This can be ordered from the pull down menu when ordering. It is a little hard to locate but it is there. I had Wendy from PCBWAY contact me and suggest I have this done. The board is sturdy and well manufactured .... All the Mini Micro Jumper cap for 2.54mm Header (shunts) are easily accessible in all forms of C64. The reset button on the cartridge is a real blessing.... no more wearing out the C64's power switch. There are clear labels on the cartridge allowing the user to confidently change any setting at will. The documentation the Sukko Perra provides on: https://github.com/SukkoPera/OpenC64Cart is very clear and helpful. There is a little jumper setting table which is very handy to print off and keep with the cartridge for setting the different ROM images. Thanks again for a nice project :-)