Re: Stellation Mill 6809 card clone / FPGA

[MdntTrain <js@cimmeri.com>]

On Jan 12, 8:07 pm, steve.how...@altium.com.au wrote:
> The picture shows three key parts to assembling your own Stellation II
> card (no soldering, just plug stuff up). The carrier board, known as
> PBA01, or with memory/cache PB02 provides all the logic you would ever
> need for an Apple II card, plus the physical requirement needed to
> plug it up to any Apple II or III.
>
> The geen adaptor board on top of the PBA card is PB04. This board
> takes any DIP 40 device (CPU or ASIC, 5v or 3.3v) and connects it to
> the FPGA seamlessly (voltage translation, power pins etc) bringing
> the device (63C09) and the FPGA together.

Ok, question Steve.   If we were to use a real CPU, would we really
need
an FPGA for such a small amount of glue logic?  Seems like it would be
extreme overkill.   Why would we not want to implement the 6809 in the
FPGA
itself?


> From here, you take your schematic
> and either schematic capture the design in the traditional way into
> your FPGA tool suite, or convert its logic process to verilog or VHDL.

Do you actually scan the schematic in, or do you mean redraw (copy)
it?


> Once captured, you download the design into your FPGA via JTAG. The
> FPGA executes the logic process, connecting the Apple II Bus to the
> 63C09, and there you have your own Stellation II copy. With this
> approach, its not emulation of the card, but more a compatible copy
> of the card.

Which FPGA tools and JTAG cable do you recommend?

Thank you,
  JS