[Coco] CC-Five (was Re: Pseudo CoCo4???) (LONG)

jdaggett at gate.net jdaggett at gate.net
Sat Jan 27 11:44:40 EST 2007

On 28 Jan 2007 at 0:16, Mark McDougall wrote:

> Joel Ewy wrote:
> > Have any idea about what percentage of likely FPGA
> > candidates would be consumed by something like an off-the-shelf PIC
> > core?
> No idea, sorry. But the T80 (Z80) core takes 2302 LEs in a Altera
> Cyclone II EP2C35, which is 6.9%. John's CPU09 (6809) core takes 2599
> LEs, about 7.8%.


John Kent's CPU09 takes up 1449 of 2448 slices in a Spartan3E XC3S250 (59%). 
John's complete SYS09 uses 1949 slices of 2448 or (80%).  A slice is 2 LUTs and 
some other logic. I believe four slices to a CLB. In a 208 pin PQFP the device is 
nicely priced at $15.25 in signle unit price. 

A Spartan 3 XC3S1000 would be more than enough for four 6809 CPUs  In a 256 
pin BGA, single unit cost is $48. 
The Spartan 3 XC3S250 is on the low end of a rather low cost Xilinx device. 
Probably like ALterra,Xilinx has its high end large devices but they carry a rather 
large price tag far in excess of $1000. 


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