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The Superboard does not have an RS-232 interface by default. In todays world, the better interface is USB. So I went about connecting a USB - TTL device so I could transfer data from my PC to my Superboard.

Here is the USB-TTL device, available on eBay for about $7.00

Tom, were you able to get the RS-232 working or did you go with a UART to USB solution?
I picked up a couple of the UART to USBs and I'm planning on hooking one of them up to my superboard tomorrow.

/Jeff

I see you have the Rockwell CPU installed already.
/Jeff

In order to calibrate TR1 I had to short pin 9 on the OSI connector with pin 1 of IC1 (I hooked to J3). Then I adjusted TR1 for a negative pulse width of 6 microseconds. /Jeff

Bill, check out the 65C21. It's a modern replacement that should keep up.

/Jeff

I haven't ordered yet, but I'm thinking a 6502B from unicorn should do the trick. It's rated at 3mhz.
/Jeff

This book contains everything you ever wanted to know about OSI Basic In Rom. Great Memory Maps starting on page 45.

http://www.jeffferguson.ca/osi/Manuals/ ... %20Rom.PDF

/Jeff

I found this article languishing in my old Challenger documentation. I remember making this modification to my unit; My very first OVERCLOCK!

http://www.jeffferguson.ca/OSI/Hardware ... %20Mod.PDF

Enjoy!
/Jeff

I found this article languishing in my old Challenger documentation. Perhaps some people here might find it interesting.

http://www.jeffferguson.ca/OSI/Hardware ... %20C1P.PDF

Enjoy!
/Jeff

I was digging through my old Challenger Doc today and came across this wonderful little tidbit:
I put this together sometime in 1980. It just shows how long I have been trying to add memory to my C1P!

/Jeff