Re: Not your father's Applicard

[alex.freed.007@gmail.com]

On Jan 12, 4:55 pm, steve.how...@altium.com.au wrote:
>
> From here, you take your schematic
>
> http://www.brouhaha.com/~eric/retrocomputing/apple/apple2/mill/mill.pdf
>

Great! This is a conclusive document sufficient to make a clone.
It is also apparent that from a hardware perspective  it's a very
straightforward design very close to the SoftCard marketed by MS.
The memory is shared with 6502 and most chips apart from the
CPU and EPROM are bus buffers, so if somebody wanted a copy
made of "hard silicon" as opposed to an FPGA implementation
it would be extremely easy to just copy the original design 100%.
All the used chips are widely available for pennies. The 6809
is also still available at Jameco for about $5.

Once Carte Blanche becomes available it should also be not
too hard to make a soft version given the open source 6809 CPU.

http://members.optushome.com.au/jekent/system09/index.html

"System09 is instruction set compatible with the 6809 and now
runs the Flex 9 operating system".

-Alex.