Sorry about that, that schematic is not the production copy. Here's an updated copy.

http://www.brielcomputers.com/files/MicroKIM25.pdf

Ok, here's the bottom mess:

Thanks. What always had me with this board was the built on keyboard. It was just so cool to have a SBC with video and keyboard like that. Just the hardware geek in me :)

Yeah, the display is only 32x32 with only 25x25 being viewable. I have a real Superboard II and the only difference that I can ...

I've been working on this project for a little while now and have a working wire-wrap prototype. It is based on the WDC65C02 running at 1Mhz using a Parallax Propeller to connect to the 6502 bus for video and ROM emulation. The Propeller also generates the 1Mhz clock signal used for the 65C02. The ...

Thanks, I really am having fun with it. I didn't realize there was so much software out there for the KIM.

Vince

6532 like on Ruud's site, although his decoding was missing a little piece to make it correct. So far I've run about 8 KIM-1 programs and all of them work just fine. I need to find a good program that uses the onboard timer of the 6530 to make sure it runs the same as the 6532.

In theory, if ...

Hey Rich,

I did a clone of the KIM-1 I call the Micro-KIM. It is only 5X6 in size so it's a lot smaller than my KIM-1. Here's a picture:

http://www.brielcomputers.com/files/mk.jpg

Vince

Hey Daryl, thanks for the info. Actually, I have hi-res scans of an old OSI-300 SBC that uses this setup. I'm going to reverse engineer it from the photo's (not that easy).

Vince

While doing some research on an old SBC I noticed that it used the internal clock option on the 6502. Does anybody have any info on resistor/cap values to use for this setup? Has anybody done this?

Vince

I've mostly tried it with read cycles but I will try it with extensive writes to mem and see what the results are.

Woz put a circuit for single step/single instruction using a single 7474 into the Apple 1 manual. Here's a link to the manual.

http://www.brielcomputers.com/files/a1man.pdf

Page 12 is what you are looking for. Ignore the slow ROM circuit. It works fine with my replica 1.

Vince

If anybody is curious, I received my MM232 board for the FT232R IC and got right to work. The drivers work perfect. I just used the virtual comm port software that is free on their site. Then I wired up the device to be bus powered. Then ran Tx and Rx in a loop back to test. I opened up Hyper ...

I'm giving this bad boy a try on my next project. It will help development of the chip with through hole and it is only $18 with royalty free drivers!

http://www.ftdichip.com/Products/Evalua ... MM232R.htm

How can you go wrong.

Vince

Did anybody notice the price of the Frogpad? Compact, yes, $169, no way. Your better off just making your own interface, it's not that difficult.

Here's the IC in a board for $79

http://www.embeddedethernet.com/

I thought about building one based on their design and interfacing it to a 6502. Obviously writing the code to do things like FTP is going to be the hard part.

Cheers,

Vince