MrDave

I made some atari carts for the first time

I have a few sample boards in production ..uses cherry mx red switches has extra mapped keys for gaming as well

I am building a few keyboards..

Not having any luck finding a keyboard.. i am looking into designing a replacement using cherry mx mechanical keys

There is also foil tape you can use.. i will check with the people on the coco discord if there are any used coco3 keyboards for sale..

Well, you could look to buy a used keyboard.. buy a new keyboard ftom the zipsters zone.. use a ps2 keyboard adapter..or make your own....

You can get get 10 chips on ebay under 20$ cdn

Ebay is pretty good.. unless you know a good electronics house

Ok so are you looking for a rom solution or a hardware fix now ?

Will this internal ram mod conflict with the external ram ? I have seen a problem with this somewhere..

Here is my latest working revision..

My first coco was a 16k. It will be limited but still alot you can do.. and you can always program on a emulator like xroar or vcc.

I am going to try and redesign the coco joystick into something more comfortable to use..this is my very first cad design .so i have a bit to learn ..lol 20210220_183843.mp4

Speed racer ? This is a good one ..

The fujitsu jad nice graphics !

I would like to run 2x6309's in series.. 16bit bus available.. some shared ram between the 2 and 2gig addressable ram . It could run as a normal coco3 or have programs use both cpus together.

Ed sniders Gime x is a coco3 upgrade that will give you 256 vga colors up to 640 wide resolution.. turbo speed modr.. 2.6x instead of 1.78mhz.. And i find programming with the 6309 cpu gives a big speed increase in programming power. You don't need a faster car if you know a good shortcut But having a faster car.. thats good too !

Here was my solution for a coco that has no rf or 1372 circuit..very simple solution ..

Thats a pretty good video..thanks

Yes the atari only uses 2 pins of the 3 from the variable resistor. To wire it up for coco 1 side of the pot goes to ground the otherside to positive..the middle to the X (or y) the button gets on side to ground and to the button wire of the coco.. i might add a switch to choose x or y... but works great so far

I split up some atari paddles and convered one to coco the other is going to my vectrex.. It's an easy conversion...

Im still working oh this game for a spring release ! https://youtu.be/FBQJJqElqYM

Hi im trying to find a bunch of blank pcb's to make some games for my atari 800xl

Like this.. for ram

Not much soldeting to do .. just solder a little wire on j1 ( bottom left ..says 64k ) a lttlecwire soldered between those pins and pop in the chips and eprom you are good to go.