[Coco] Are MC68B09E's and HM63C09E's as well as various support chips still available?

[Mike Rowen]

John,

I enjoy reading your posts, but your skills are lightyears ahead of mine and I can't really contribute to the conversation. Is there an emoticon for envy?? :) Keep up the great FPGA work!

Cheers,
-Mike 

On May 25, 2012, at 6:09 AM, John Kent <jekent at optusnet.com.au> wrote:

> 
> 
> On 25/05/2012 12:08 PM, John Kent wrote:
>> 
>> 
>> On 25/05/2012 4:22 AM, jdaggett at gate.net wrote:
>>> On 23 May 2012 at 23:47, Computer Doc wrote:
>>> 
>>>> Has anyone recreated the 6809 or the 6309 in one of the FPGAs as a
>>>> separate chip for inclusion in a breadboard design?  I'm glad to have found
>>>> others that are into the Coco 3 as much I was and am again.  Have a great
>>>> day and may God Richly Bless You all.  Thank you all in advance.
>>> The 6809 as well as a complete Coco3 has been reproduced within both the XILINX and
>>> ALtera FPGAs. As to this date I am unaware of anyone that has done a 6309 in an FPGA.
>>> 
>>> james
>> Hi James & Computer Doc,
>> 
>> I am working on updating the FPGA 6809 design to include 6309 instructions.
>> I have bursts of enthusiasm from time to time and then I'm distracted by other things.
>> As I mentioned on the list before, I have a 6809 SoC on the XESS XuLA board, which is a 200K gate FPGA.
>> It includes the CPU, PS/2 keyboard interface, serial port & text VDU as well as a monitor ROM.
>> It has 1MB of RAM with Dynamic Address Translation.
>> It's a very tight fit in the FPGA. I'm not sure the 6309 design would fit.
>> 
>> I might write later. I have had a friend call in.
>> 
>> John.
>> 
> 
> I had to go visit a friend. I'm back now. When I post stuff the list it seems to go quiet, so, I'm not sure how my posts are regarded.
> 
> I've ported my 6809 system to a number of FPGA boards. I've included the peripherals in the design, because the clock is 25MHz which is way too fast for the standard Motorola peripherals. There is not much point having a fast FPGA CPU unless you have fast peripherals and memory to suit.
> 
> I have a number of the peripherals such as ACIAs, PIAs, Timers and so on written in VHDL. The design is a pattern that can be replicated or instantiated as may times as you like provided there are enough pins on the FPGA to connect to connect all the I/O and there is enough FPGA logic to implement them all.
> 
> You don't have to lay out circuit boards. You can buy development boards that have the physical interface chips and connectors already on them and many of them have external expansion buses. If you like the fun of actually laying out a PCB, and you like the idea of having the physical chips in hand, then by all means design a PCB, or design an add on on board for an existing FPGA development board to implement features it doesn't have.
> 
> Having a potted design doesn't teach you much, but you can add your own peripherals, like a better video controller, sound synthesizer or data acquisition. There is a whole heap of things you can do with FPGAs. there was a Moog synthesizer on the Google search page the other day. You can implement digitally controlled oscillators rather than voltage controlled. Have Direct Digital Synthesis with a phase accumulator with programmable increment value, connected to a wave table in memory and have the wave table value output to an audio codec or DAC.
> 
> John.
> 
> 
> -- 
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> 
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