osiweb.org

I'll be putting updates in the original post at the top.

I'm reluctant to make this board too complicated as I have seen too many nice simple ideas grow to the point that they get so complicated they never see the light of day. I could add the 8K EPROM and a jumper to switch between RAM and ROM in the space between $8000 and $9FFF, but I think that is as ...

Another alternative if Grant is willing to share the 610 netlist is to add your memory and decoder to the 610 FDC circuitry along with ROM , sound and 40 pin expansion. That would be very useful. Anyone ?? Grant has also hinted at colour. I wonder what that entails ? Mike Where does the FDC I/O go ...

Interested too. Ive had a ROM RAM board design kicking around for a while now. Its taken me an age to get a paddle/data separator board done with Phils help but that's now shortly to go to the PCB manufacturer ( allows standard floppy attachment 5 and 8" ). So maybe I would run with your design to ...

Interested! I wonder if this can also be adapted to the C4P. I have one of those with only 8K as well! /Jeff If the pin-out of the C4P expansion socket is the same as the C1/SB and it's memory map is open from $2000 to $9FFF, then it should work just fine. Keep in mind, pin-11 of the expansion sock...

That looks great! I'd be definitely interested. Do I see it correctly that this plugs into the expansion socket, and that the socket on top of your board can still be used for other expansions? Yes, it plugs into the 40-pin expansion socket and provides a feed-through socket on top. With this in pl...

Thanks Grant.

Update: 2015/07/16 The boards are in from manufacture!! I have built one of each and extensively tested the RAM only board. Here is what the RAM only board looks like http://www.onebytecpu.com/images/electronics/osi_sb_me/ME10.jpg Built up http://www.onebytecpu.com/images/electronics/osi_sb_me/ME12...

Thanks Dave.

Does anyone have the details for the Superboard 64 column mod?

Also, the GT mod would be appreciated.

Thanks!